· Mason Everett · Reviews · 8 min read
10 Best Microwave High Voltage Diode 2026 Guide
Finding the right Best Microwave High Voltage Diode can be a daunting task for many homeowners who are facing a broken appliance.
When your microwave suddenly stops heating while the tray still spins, this small but critical component is often the primary culprit.
We evaluated dozens of repair parts based on quality, durability, value, and electrical performance to find the top solutions available today.
Modern diodes must prioritize safety and offer broad compatibility with major kitchen appliance brands like GE, Whirlpool, and Samsung.
This comprehensive guide will help you navigate technical specifications so you can make an informed decision and restore your microwave efficiently.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
BOJACK CL04-12 High Voltage Diode
A premium two-pack solution that offers 12KV protection and excellent compatibility with GE and Whirlpool models.
Comimark 5-Piece Rectifier Set
An incredibly cost-effective five-piece pack that ensures you have multiple backups for various repair projects.
GE Authentic OEM WB27X35382
The gold standard in reliability, this genuine manufacturer part ensures perfect fit and factory-grade safety standards.
10 Best Microwave High Voltage Diode
Restoring your microwave is often a simple matter of swapping out a failed diode, saving you hundreds on a new appliance. These high-voltage rectifiers are the unsung heroes of your kitchen, and choosing the right one ensures your magnetron receives the correct power for years to come.
BOJACK CL04-12 Dual Pack
Best in class for heavy-duty repair projects
The BOJACK CL04-12 is a high-quality repair component designed to handle the rigorous electrical demands of modern microwaves.
With a 12KV withstand voltage and a 0.5A rated current, it provides the stability needed for consistent heating.
This diode is not just for home kitchens; its versatile design makes it suitable for medical X-ray machines and air purifiers as well.
The metal and plastic construction is robust, ensuring it can survive the high temperatures inside an appliance cabinet.
It is a direct replacement for parts like WB27X10597 and W10492276, making it a favorite for DIYers looking for a reliable fix.
Product Specs
| Voltage | 12KV |
| Current | 0.5A |
| Quantity | 2 Pieces |
| Material | Metal/Plastic |
Features
- 12KV Withstand Voltage for safety
- 0.5A Rated Current for stability
- Metal and Plastic durable materials
- Broad compatibility with top brands
- Multipurpose use in air purifiers
- Direct replacement for T4512 models
What We Like
- Excellent value with two units
- High voltage tolerance
- Versatile application range
What We Don't Like
- Basic packaging
- Requires proper terminal crimping
Why We Selected This Product
We chose this BOJACK model because of its impressive thermal management and dual-pack value.
During our analysis, it showed consistent performance across multiple industrial applications, not just microwaves.
The 0.5A rating offers a slightly higher threshold than standard budget options, providing a safety margin that enthusiasts appreciate.
User Experience
Users consistently report that these diodes fixed their non-heating microwaves in under twenty minutes.
Many appreciate the inclusion of two pieces, as it provides a safety net if one is damaged during installation.
The leads are flexible enough for easy positioning but strong enough to maintain a secure connection.
Comimark 5-Piece Rectifier
Best in class for bulk value and technicians
For those who find themselves repairing multiple appliances or simply want the best price per unit, the Comimark 5-piece set is unmatched.
These CL04-12 rectifiers are rated at 12KV and 0.45A, providing the necessary one-way electrical flow for most residential microwaves.
They are designed to replace common part numbers like W10245187 and W10492278.
The construction is standard for the industry, offering a balance of affordability and functional reliability.
This pack is particularly useful for community repair shops or households with multiple older microwaves that may need maintenance over the coming years.
Product Specs
| Voltage | 12KV |
| Current | 0.45A |
| Quantity | 5 Pieces |
| Type | One-way Rectifier |
Features
- Value pack containing 5 diodes
- 12KV peak reverse voltage
- 0.45A average forward current
- One-way rectifier functionality
- Compatible with W10245187
- Easy to integrate into circuits
What We Like
- Best price per unit
- Bulk quantity for repairs
- Standard universal sizing
What We Don't Like
- Slightly lower current than premium models
- Plastic casing feels thin
Why We Selected This Product
Selection was based on the sheer value and positive feedback from the repair community.
While some budget options can be hit or miss, Comimark has maintained a steady reputation for functional components that meet the basic requirements of high-voltage appliance circuits without unnecessary frills.
User Experience
Repair professionals often stock these because they are reliable enough for everyday fixes.
Homeowners like the fact that having five pieces means they can experiment with the repair without fear of wasting their only part.
The fit is generally described as standard for most Whirlpool-manufactured ovens.
GE Authentic OEM WB27X35382
Best in class for guaranteed compatibility
When it comes to high-voltage electronics, many people prefer the peace of mind that comes with an Original Equipment Manufacturer part.
The GE WB27X35382 is a genuine component that undergoes rigorous quality testing to meet strict safety standards.
It replaces several older part numbers, including WB18X10449 and WB27X10892.
Because it is an authentic GE part, it is guaranteed to fit perfectly in GE and Hotpoint microwaves without any modifications.
This is a functional equivalent to several prior iterations, ensuring that even older models can be kept running with modern, safe electronics.
Product Specs
| Brand | General Electric |
| Part Number | WB27X35382 |
| Compatibility | GE/Hotpoint |
| Condition | New OEM |
Features
- Genuine OEM General Electric part
- Quality tested to GE standards
- Fits GE and Hotpoint models
- Replaces WB27X10930 and others
- Authorized brand new component
- Ensures electrical current control
What We Like
- Guaranteed brand fit
- Higher safety manufacturing standards
- Brand new, not refurbished
What We Don't Like
- Higher price point
- Only includes one diode
Why We Selected This Product
We selected this part for its unmatched safety profile and OEM status.
For high-voltage applications, using a part specifically validated by the appliance manufacturer reduces the risk of secondary failures or compatibility issues.
It is the safest choice for those who are not comfortable with aftermarket alternatives.
User Experience
Users mention that while this part is more expensive than generics, the installation is seamless.
The terminal connectors are exactly where they should be, and the wire length is perfectly matched to GE models.
It eliminates the guesswork often associated with universal repair parts.
Piumeif W11256462 Rectifier
Best in class for high surge protection
The Piumeif W11256462 is a robust diode known as the EXPHV13, designed specifically for Whirlpool and Kenmore appliances.
It stands out due to its isolated case and impressive surge overload rating of 50 amperes peak.
This makes it exceptionally resilient against the sudden power spikes that can occur when a microwave magnetron kicks in.
With a 12KV rating and 350mA capacity, it offers a low forward voltage drop, which translates to efficient power conversion and less heat buildup.
It serves as a comprehensive replacement for a massive list of part numbers, making it one of the most versatile aftermarket options available.
Product Specs
| Peak Surge | 50 Amperes |
| Voltage | 12KV |
| Brand Compatibility | Whirlpool/Kenmore |
| Design | Isolated Case |
Features
- EXPHV13 high voltage rectifier
- 50A peak surge overload rating
- Isolated case for extra safety
- Low forward voltage drop design
- Replaces W10492278 and AP6784287
- 12kV 350mA electrical rating
What We Like
- Incredible surge resistance
- Wide replacement compatibility
- Cooler operating temperature
What We Don't Like
- 350mA is lower than some others
- Single pack only
Why We Selected This Product
This product was chosen for its superior surge protection capabilities.
In electrical systems where power stability is an issue, a diode that can handle a 50A peak is far less likely to fail prematurely.
The low forward voltage drop is a technical advantage that ensures the component stays cooler during operation.
User Experience
Users often comment on the high-quality feel of the isolated case.
It is frequently cited as the go-to part for Kenmore Elite repairs.
Many homeowners found that this specific model lasted longer than the original factory diode that came with their microwave.
BOJACK CL01-12 Dual Pack
Best in class for LG and Samsung repairs
Another excellent offering from BOJACK, the CL01-12 is tailored for models that require a 350mA current rating, common in many LG and Samsung microwaves.
Like its sibling, it handles up to 12KV and is built from high-grade metal and plastic.
This model is a direct replacement for parts like DE91-70063D and HVM12.
It is engineered to perform reliably in both consumer electronics and industrial settings, such as laser power supplies and metal detectors.
The pack of two ensures that you have a spare on hand, which is vital given how critical this part is to the daily use of a microwave.
Product Specs
| Current | 350mA |
| Voltage | 12KV |
| Quantity | 2 Pieces |
| Replacement | DE91-70063D |
Features
- CL01-12 specialized repair part
- 350mA rated current capacity
- 12KV withstand voltage rating
- Compatible with LG 6851W1A002E
- Includes two diodes per pack
- Industrial grade material build
What We Like
- Perfect for LG/Samsung specs
- High quality lead wires
- Cost-effective dual pack
What We Don't Like
- Not for high-current 0.5A needs
- Basic aesthetics
Why We Selected This Product
We selected the CL01-12 for its specialization in the 350mA category.
While some people try to use 500mA diodes everywhere, sticking closer to the original spec can sometimes offer better protection for other sensitive components.
BOJACK is a trusted name in replacement electronics, and this dual pack continues that trend.
User Experience
Customers find that these diodes are easy to install and fit perfectly in LG over-the-range microwaves.
The lead wires are pre-tinned, making them easy to solder if your specific model doesn't use screw terminals.
Most report that their heating issues were solved immediately.
HUAREW CL04-12 Repair Part
Best in class for multi-brand compatibility
HUAREW offers a versatile 2-piece set of CL04-12 diodes that are compatible with a massive array of brands including Amana, Electrolux, Maytag, and Whirlpool.
These are standard 12KV, 0.5A rectifiers that provide dependable power management.
They are frequently used in diverse fields beyond cooking, such as electrostatic precipitators and radio transmitters.
The design focuses on ease of replacement, allowing a skilled technician or a well-trained homeowner to swap the part and restore microwave function quickly.
This versatility makes it an excellent addition to any general home repair kit.
Product Specs
| Brands | Whirlpool/LG/GE/Maytag |
| Current | 0.5A |
| Voltage | 12KV |
| Quantity | 2 Pieces |
Features
- Model CL04-12 high voltage diode
- 0.5A and 12KV standard rating
- Compatible with GE and Electrolux
- Suitable for high-voltage generators
- Comes in a convenient pack of 2
- Durable metal and plastic build
What We Like
- Widest brand compatibility
- Accurate technical specs
- Good thermal performance
What We Don't Like
- Requires technical installation knowledge
- Terminals may need slight adjustment
Why We Selected This Product
HUAREW was chosen for its excellent track record in the appliance repair space.
These diodes are known for being true to their specifications, ensuring that the 12KV protection is actually there.
The wide brand compatibility list makes it a safe bet when you are unsure of the exact OEM part number.
User Experience
Reviewers mention that the HUAREW diodes are robust and show no signs of overheating even after months of heavy microwave use.
The packaging is often noted as being secure, protecting the delicate components during shipping.
It is a straightforward, no-nonsense fix for a common problem.
Piumeif HV03-12T01 Diode
Best in class for Frigidaire and Sharp
The Piumeif HV03-12T01 is specifically engineered to replace Frigidaire part number 5304467670.
It includes an upgraded heat shrink tubing on the female terminal, which provides an extra layer of safety and durability against electrical arcing.
With a 12KV withstand voltage and standard sizing (0.17in O-terminal, 1/4in female terminal), it is a precise fit for many Frigidaire, Electrolux, and Sharp microwaves.
This model is often cited for its high-quality connectors that don't wiggle loose over time, ensuring a constant and safe connection within the high-voltage circuit of your appliance.
Product Specs
| Replacement | 5304467670 |
| Female Terminal | 1/4 inch |
| Voltage | 12KV |
| Insulation | Heat Shrink Tubing |
Features
- Direct replace for Frigidaire 5304467670
- Upgraded heat shrink on female terminal
- 12KV withstand voltage rating
- Standard 1/4 inch female terminal
- Fits Sharp and Electrolux models
- Precise O-terminal diameter
What We Like
- Enhanced insulation for safety
- Perfect fit for Frigidaire Gallery
- High quality terminal connectors
What We Don't Like
- Priced slightly higher for one unit
- Very specific model focus
Why We Selected This Product
This part stands out because of the upgraded heat shrink tubing.
In the high-voltage environment of a microwave, any exposed metal can be a point of failure or dangerous arcing.
The added insulation on the female connector shows a commitment to safety that we highly value for home repair products.
User Experience
Users who own Frigidaire Gallery models specifically recommend this part.
They note that the terminals are high-quality and the heat shrink is a nice touch that makes the part feel superior to the one they removed.
It fits into the existing screw mounts without any drilling or modification.
Piumeif HVR-1X4 Universal
Best in class for pointer multimeter testing
The HVR-1X4 is a universal high-voltage rectifier that fits an incredible variety of brands including Whirlpool, Kenmore, and GE.
It replaces a long list of parts such as T3509 and HVM12.
One unique aspect of this product is the helpful advice provided by the manufacturer regarding testing; they remind users to use a pointer multimeter rather than a digital one for accurate resistance readings.
This level of detail shows they understand the practicalities of appliance repair.
The diode itself is built to handle the rigorous duty cycles of a household microwave, acting as a reliable gatekeeper for electrical current.
Product Specs
| Type | HVR-1X4 |
| O-Terminal | 0.12 inch |
| Compatibility | Universal |
| Replacement | T3512 / HVM12 |
Features
- Universal HVR-1X4 rectifier design
- Standard 0.12in O-terminal size
- Replaces T3509 and 6021W3B001U
- Fits most major microwave brands
- High durability for long-term use
- Clear technical testing instructions
What We Like
- Very helpful technical guidance
- Highly universal fitment
- Rugged construction
What We Don't Like
- Requires specific multimeter for testing
- Standard leads only
Why We Selected This Product
We selected this product because of the manufacturer’s transparency and helpful technical tips.
Many DIYers fail to test diodes correctly using digital meters, so providing this guidance adds value to the purchase.
The HVR-1X4 design is a tried-and-true standard for universal microwave repair.
User Experience
Homeowners appreciate the clear instructions on how to verify if the part is working.
Many users bought this after their microwave magnetron started making a loud humming sound, and this diode solved the issue immediately.
The universal sizing makes it easy to install in almost any brand.
XPARTCO EXPHV10 Wide Match
Best in class for legacy microwave models
The XPARTCO EXPHV10 is a heavy-duty diode that boasts one of the most extensive replacement lists in the industry.
It covers hundreds of part numbers from brands like Frigidaire, GE, LG, and Amana.
This makes it an essential part for anyone trying to fix a legacy microwave where the original parts might be discontinued.
It handles the high voltage required by magnetrons with ease, acting as a direct electrical equivalent to OEM-6079160 and many others.
Its design is focused on long-term stability, ensuring that once you fix your microwave, you won't have to open it up again for the same issue any time soon.
Product Specs
| Model | EXPHV10 |
| Voltage | High Voltage Rated |
| Brand | XPARTCO |
| Fit | Universal/Legacy |
Features
- EXPHV10 wide-ranging replacement part
- Replaces AP2026385 and WB27X1160
- Standard high-voltage rectifier specs
- Durable housing for heat resistance
- Compatible with DE91-70063D
- Trusted by professional repair techs
What We Like
- Unrivaled compatibility list
- Solid electrical performance
- Reliable for older models
What We Don't Like
- Single unit per package
- Standard lead insulation
Why We Selected This Product
The EXPHV10 was selected for its impressive compatibility range.
When you are dealing with a 10 or 15-year-old appliance, finding a part that explicitly lists those old numbers is incredibly helpful.
XPARTCO has done the homework to ensure this diode covers the widest possible range of microwave electronics.
User Experience
Technicians who work on varied brands love this part because it reduces the number of different items they need to carry in their van.
For the average consumer, it provides the confidence that the part will work with their specific model, no matter how obscure the brand might be.
Piumeif W10687786 Upgrade
Best in class for safe electrical connections
Closing our list is the Piumeif W10687786, a specialized diode that fits Whirlpool, GE, and Frigidaire models perfectly.
This model includes an upgraded heat shrink tubing on the female side to ensure a permanent and safe connection.
It is rated for 12KV and acts as a direct replacement for parts like WB27x10037 and 5304509479.
The insulation is a key feature here, as it prevents the diode from coming into contact with other internal metal parts, which is a common cause of secondary shorts.
It is a robust, well-engineered solution for the most common heating failures in modern household microwaves.
Product Specs
| Rating | 12KV |
| Safety | Heat Shrink Protected |
| Compatible | Whirlpool/GE/Frigidaire |
| Part ID | W10687786 |
Features
- W10687786 dedicated repair diode
- Upgrade heat shrink tubing on female side
- 12KV rating for maximum safety
- Replaces 5304509479 and WB27X1160
- Fits Whirlpool and GE models
- Prevents arcing and secondary shorts
What We Like
- Superior safety features
- Easy to install terminal
- Reliable high-voltage gate
What We Don't Like
- Specific to common US brands
- Only one per pack
Why We Selected This Product
We included this as our final pick because it combines the best of all worlds: high-voltage capacity, safety upgrades like heat shrink tubing, and a very competitive price.
It addresses the main failure points of standard diodes while providing the extra insulation that professional technicians often add manually.
User Experience
Users find that this diode feels more 'complete' than cheaper, bare-wire versions.
The heat shrink is already applied, which saves a step during installation.
Many report that it solved the classic problem of the microwave making a buzzing sound but not getting the food hot.
What to Look for Before Buying the Best Microwave High Voltage Diode
Find Your Need - Compatibility and use case considerations
The most important step is checking your microwave’s model number or the part number on the existing diode. While many diodes are universal, some have different terminal sizes (e.g., a screw-on O-ring versus a slide-on female spade). Always verify the physical connectors before purchasing to avoid a frustrating installation process.
Budget - Setting realistic price expectations ($X-$Y ranges)
Microwave diodes are generally very affordable. Single units typically range from $6 to $12, while bulk packs (2 to 5 pieces) offer better value at $10 to $18. Unless you are buying a genuine OEM part from the manufacturer, there is rarely a reason to spend more than $20 on this component.
Key Features - Most important technical specifications
Look for a withstand voltage of at least 12KV. Most modern microwaves operate in this range. The current rating usually falls between 350mA and 500mA (0.5A). While a 500mA diode can usually replace a 350mA one, always check if your specific high-performance microwave requires a specific surge rating.
Quality & Durability - What to look for in construction
High-quality diodes often feature extra insulation, such as heat shrink tubing over the terminals. This prevents electrical arcing, which can damage other internal components. Ensure the metal leads are flexible enough to be bent into position but thick enough to handle the thermal load without melting.
Brand Reputation - Importance of established manufacturers
While generic parts often work well, brands like BOJACK, HUAREW, and GE (OEM) have a history of meeting safety standards. For something as dangerous as a high-voltage microwave circuit, sticking with a reputable brand or an authentic OEM part provides an extra layer of peace of mind and fire safety.
Portability/Size - Considerations for space and storage
Diodes are small components, but the wire lead length matters. Some microwaves have the capacitor mounted far from the grounding point. Check the length of the leads on the product photos to ensure it will reach across the components in your specific microwave model.
Is it A Wise Decision to Buy microwave high voltage diode?
Buying a high voltage diode is one of the smartest repair decisions a homeowner can make. When a microwave stops heating, the common reaction is to throw it away and buy a new one for $150 to $400. However, the diode failure is responsible for a huge percentage of these issues and can be fixed for less than $10. By choosing to repair instead of replace, you are not only saving significant money but also preventing heavy electronic waste from entering landfills.
Compared to other appliance repairs, replacing a diode is relatively low-risk if you follow safety procedures like discharging the capacitor. The long-term benefit is a fully functional microwave that can last several more years. Even if you have to hire a technician, providing the part yourself can often lower the repair cost significantly. Given the low cost of the component versus the high replacement cost of the appliance, it is an extremely cost-effective investment.
What Is the Best Way to Choose microwave high voltage diode?
The best way to choose the correct diode is to follow a systematic identification process. Start by unplugging your microwave and letting it sit for at least 24 hours to allow the capacitor to naturally discharge, or manually discharge it using insulated tools if you are trained. Remove the old diode and look for a part number printed on the side, such as CL04-12 or HVM12.
Once you have the part number, search for a replacement that specifically lists that number. Look for a model that has the same terminal configuration. For example, if your old diode had a ring terminal on one end and a spade on the other, make sure the new one does too. Avoid “hacking” the connection with electrical tape; use the correct connectors. If you are a beginner, opting for a 2-pack is wise, as it gives you a spare in case the first one is damaged during the crimping or mounting process. Always prioritize diodes with UL or other safety certifications.
FAQ
What is the best microwave high voltage diode for beginners? For beginners, a universal model like the HVR-1X4 or a dual-pack from BOJACK is ideal. These models are widely compatible and usually come with the most common terminal types. Beginners should also look for products that include clear instructions or diagrams, as understanding the polarity (the side that connects to the ground vs the capacitor) is crucial for a successful repair.
How much should I spend on microwave high voltage diode? You should expect to spend between $7 and $15. If you find a single diode for under $5, it may be of lower quality with thin leads. Conversely, paying over $25 is usually unnecessary unless you are purchasing a specialized OEM part for a high-end commercial microwave. Most high-quality aftermarket diodes fall right in the $10 range for a pack of two.
What features are most important in microwave high voltage diode? The most critical features are the 12KV voltage rating and the terminal compatibility. Without the correct voltage rating, the diode will fail almost instantly. Secondary features like heat shrink insulation are also highly recommended to prevent arcing. A high surge current rating (like 50A peak) is also a great feature for ensuring the diode survives the initial power-on spike.
How do I maintain my microwave high voltage diode? Diodes are solid-state components and do not require active maintenance. However, keeping your microwave’s cooling vents clean and free of dust will prevent the internal compartment from overheating. Excess heat is a primary cause of diode failure. If you notice a loud humming sound or a burning smell, you should stop using the microwave immediately to prevent the failing diode from damaging the expensive magnetron.
Are expensive microwave high voltage diode worth it? Expensive OEM (Original Equipment Manufacturer) diodes are worth it if you are uncomfortable with technical specifications and want a guaranteed fit. For brands like GE or LG, the OEM part ensures that the safety testing was conducted specifically for your microwave’s power output. However, for most standard repairs, a high-quality aftermarket brand like BOJACK offers identical performance for a fraction of the price.
What brands make the best microwave high voltage diode? GE (General Electric) is the top choice for OEM reliability. For aftermarket solutions, BOJACK, Piumeif, and HUAREW are the industry leaders. These brands have consistent quality control and provide the necessary technical specs to ensure their components meet the high-voltage demands of modern kitchen appliances.
How long do microwave high voltage diode typically last? A well-made high voltage diode should last as long as the microwave itself, often 5 to 10 years. However, power surges, heavy usage, or poor ventilation can shorten this lifespan. If you have replaced your diode once and it fails again quickly, you may have a failing magnetron or capacitor that is putting too much stress on the diode.
Can I find good microwave high voltage diode on a budget? Yes, budget options are plentiful. The Comimark 5-piece set is the best budget-friendly way to get reliable components. When buying on a budget, just ensure you aren’t sacrificing the 12KV rating. Most “budget” diodes are actually the same components sold individually at higher prices, so buying in multi-packs is the best way to save.
Final Verdict
After evaluating the top options on the market, the BOJACK CL04-12 stands out as the best overall choice due to its high voltage tolerance and excellent dual-pack value.
For those looking for the ultimate safety and a guaranteed fit, the GE Authentic OEM WB27X35382 is the premium choice that eliminates all guesswork.
Budget-conscious users or repair enthusiasts should look toward the Comimark 5-piece set for the best price-to-performance ratio.
Repairing your microwave with a high-quality diode is a safe, sustainable, and cost-effective way to keep your kitchen running smoothly.
Product recommendation: BOJACK CL04-12 Microwave Diodes
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