BOJACK Microwave Fuse 20a Ceramic Fuse 20 Amp 250V Slow-Blow Compatible and Universal Replacement for WB27X10388 and Other Microwaves
4.6Editor score
20A 250V rating
6x30mm slow-blow
Compatible with GE models
Ceramic tube protection
In this guide
Finding the right fuse for your microwave is essential for safety and performance. A quality ceramic fuse protects against surges and ensures your appliance operates safely without risking electrical hazards during daily use.
We evaluated ten top-rated 20A 250V ceramic fuses based on build quality, compatibility, and user feedback. Our analysis focuses on slow-blow designs that handle inrush currents while maintaining reliable protection for your microwave circuitry.
Each selection includes detailed specs and pros to help you decide quickly. Prices fluctuate based on availability and seller promotions, so always verify current listings before purchasing your replacement fuse for optimal value.
Top 3 Picks for Best 20A 250V Ceramic Fuses for Microwave Ovens
Frienda 20 Pcs Microwave Fuse, 20a 250v Slow-Blow Ceramic
4.7Editor score
20 pieces included
6.35x30mm size
Slow acting blow type
Filled with sand
BlueStars Upgraded 5-Pack WB27X10388 20A 20 Amp 250V Ceramic Microwave Fuse
4.5Editor score
Upgraded 5-pack
Quartz sand filled
Wear-resistant caps
Lifetime protection
Top 10 Best 20A 250V Ceramic Fuses for Microwave Ovens in 2026 Compared
Here is a side-by-side comparison of all ten selected fuses to help you evaluate specs, ratings, and compatibility at a glance.
ProductsSpecificationsEditor scorePrice
Best Budget
BOJACK Microwave Fuse
20A 250V
6x30mm size
Slow-blow type
GE compatible
4.6Editor score
Editor's Choice
Frienda 20 Pcs
20 pieces
6.35x30mm
Slow acting blow
Sand filled
4.7Editor score
Best Premium
HiQltyla 20A
2Pcs package
6x30mm
CSA certified
Quartz sand
4.6Editor score
BlueStars Upgraded
5-Pack
6x30mm
Lifetime protection
Universal fit
4.5Editor score
5-Pack 20 amp
5-Pack
0.24×1.2 inch
Universal replacement
Wide compatibility
4.5Editor score
Microwave Fuse 6PCS
6PCS
6x30mm
Direct replacement
Ceramic construction
4.4Editor score
(Pack of 10)
10 PCS
6x30mm
Slow blow
Quartz sand
4.6Editor score
BOJACK Pack of 20
20 pcs
6x30mm
Time-delay
Plastic case
4.6Editor score
Litoexpe 20-Pack
20-Pack
6x30mm
Risk-free shopping
Carrying case
4.7Editor score
(Pack of 5)
5 Pack
20A 250V
Fast Blow
Fits OEM
4.7Editor score
1. BOJACK Microwave Fuse – Best Overall Budget Ceramic Fuse
BOJACK Microwave Fuse
20A 250V
6x30mm dimensions
Slow-blow design
Ceramic tube body
The BOJACK Microwave Fuse offers a reliable and affordable solution for users needing a direct replacement for GE WB27X10388 models. With a solid 4.6 rating, this 20A 250V slow-blow ceramic fuse provides essential protection against overloads without unnecessary cost or complexity.
Pros
- Affordable single fuse option
- Direct GE replacement
- Slow-blow protects circuit
- Verified compatibility
- High customer rating
Cons
- Single unit only
- Check size carefully
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Its slow-blow design is critical for microwaves that experience temporary high inrush currents during startup. This feature prevents unnecessary blowing during normal operation while still safeguarding against dangerous sustained overcurrents. The ceramic construction ensures heat resistance and electrical stability under demanding conditions.
While it comes as a single fuse, making it less ideal for stocking spares, its straightforward specifications and universal fit make it a strong choice for immediate repairs. Users should verify their existing fuse dimensions match before installation to ensure a perfect fit within the holder.
This fuse is recommended for budget-conscious homeowners seeking a dependable fix for a blown microwave fuse. It balances performance with value effectively, ensuring your appliance stays operational without overspending on replacement parts that exceed your current needs.
Affordable and Reliable
This fuse delivers exceptional value by providing a high-quality slow-blow ceramic solution at a minimal price point for budget repairs.
Universal Compatibility
Compatible with GE WB27X10388 and other major brands, it simplifies the search for the right replacement part without confusion.
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2. Frienda 20 Pcs – Best Value Pack for DIY Repairs
Frienda 20 Pcs
20 pieces
6.35x30mm size
Slow acting blow
Sand filled tube
Frienda's 20-piece pack provides an excellent supply for DIY enthusiasts or those managing multiple appliances. With a high 4.7 rating, these 20A 250V ceramic fuses are designed to resist surge currents safely while maintaining compatibility with major microwave brands like GE and Kenmore.
Pros
- 20 units included
- Resist surge currents
- Safe sand fill
- Compatible with many brands
- High safety rating
Cons
- Aftermarket product
- Check voltage rating
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The ceramic tube is filled with sand, which enhances safety by preventing glass fragments from scattering if the fuse burns out. This design feature reduces fire risk and ensures a cleaner repair process compared to standard glass alternatives often found in older models.
Although these are aftermarket replacements rather than original manufacturer parts, their durability and precise specifications make them a practical choice for routine maintenance. Always double-check the rated current and voltage before purchase to ensure they match your appliance requirements exactly.
This pack is ideal for families with multiple microwaves or anyone who wants spare fuses on hand for future repairs. The high count ensures you are prepared for unexpected failures without needing to reorder frequently, saving time and long-term costs.
Safety Focused Design
The sand-filled ceramic tube prevents dangerous glass fragments and reduces the risk of fire during fuse failure events.
Bulk Convenience
With 20 pieces in one order, you have ample supplies for multiple repairs or future replacements without reordering.
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3. HiQltyla 20A – Best Premium Slow-Blow Option
HiQltyla 20A
2Pcs package
6x30mm size
CSA certified
Quartz sand filled
HiQltyla offers a premium two-pack with a 4.6 rating, focusing on high-quality materials that ensure longevity and safety. The slow-blow design keeps your microwave circuitry protected against unexpected surges, while the quartz sand fill minimizes arc risks during overheating scenarios.
Pros
- Safety certified
- High quality materials
- Slow-blow protection
- Quartz sand fill
- 1 year warranty
Cons
- Only 2 fuses
- Verify specs first
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All electrical properties have passed safety certifications such as CSA, giving users confidence in the fuse reliability. The ceramic tube design ensures better performance under high temperatures, making it a sturdy choice for appliances that run for extended periods during heavy cooking loads.
While the two-pack may require a second purchase if you need bulk supplies, the inclusion of a one-year warranty adds significant value to this premium option. It is a thoughtful balance of safety features and performance that exceeds basic replacement standards available in the market.
This fuse is recommended for users who prioritize certified safety and durability over quantity. If you want peace of mind knowing your microwave is protected by a certified component, this choice offers the necessary assurance for safe daily operation.
Certified Safety
Passing CSA safety certifications ensures that all electrical properties meet rigorous standards for reliable microwave protection.
Arc Reduction Technology
The quartz sand fill inside the ceramic tube reduces arc risks and improves safety compared to standard air-filled fuses.
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4. BlueStars Upgraded – Best Durable Replacement
BlueStars Upgraded
5-Pack
6x30mm size
Quartz sand filled
Lifetime protection
BlueStars delivers an upgraded five-pack solution designed for long-term reliability and durability. These 20A 250V fuses feature high-purity quartz sand inside to maintain insulation integrity, ensuring that overcurrents cannot reconnect the circuit and damage the load during failures.
Pros
- 5-pack quantity
- High-purity quartz sand
- Wear-resistant caps
- Lifetime protection
- Universal compatibility
Cons
- Check part number first
- Verify fuse size
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The wear-resistant end caps provide sturdy construction that resists physical damage during installation and daily use. This robust design ensures stable operation, and the inclusion of a lifetime protection guarantee offers users significant confidence in the product's longevity over time.
While compatibility is wide across brands like GE and Whirlpool, it remains crucial to check your original part number before purchase. Ensuring the fuse dimensions and voltage ratings match prevents installation issues that could lead to repeated failures or safety hazards.
This option suits those looking for a reliable bulk supply backed by strong customer support. The combination of superior material quality and lifetime protection makes it a strong contender for users who want to avoid frequent replacements.
Superior Insulation
High-purity quartz sand inside the fuse tube prevents insulation breakdown and keeps the circuit safe during faults.
Lifetime Assurance
Enjoy reliable performance with a lifetime protection guarantee that ensures defects are covered for the product lifespan.
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5. 5-Pack 20 amp – Best Direct Fit Universal Replacement
5-Pack 20 amp
5-Pack
6x30mm dimensions
Universal replacement
Heavy-duty ceramic
This five-pack provides a versatile universal solution that fits most microwave brands including GE, Kenmore, and KitchenAid. With a solid 4.5 rating, these 20A 250V slow-blow ceramic fuses are designed to act as a reliable safety device against overheating and overcurrents.
Pros
- 5-Pack value
- Direct GE replacement
- Universal fit
- Safe disconnect power
- Easy install
Cons
- Verify size before buy
- Check ratings carefully
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The heavy-duty ceramic tube construction ensures excellent stability under stress, maintaining performance even during power surges. Its ability to quickly disconnect power protects the internal circuit from further damage when dangerous conditions arise inside the microwave housing.
Installation is straightforward if you unplug the microwave first and locate the fuse holder near the power cord. However, always verify the fuse size and ratings carefully to ensure it matches your existing part for a seamless and safe replacement process.
Ideal for homeowners seeking a universal replacement without brand restrictions, this pack offers both convenience and durability. It balances price and performance well for standard repairs, ensuring you can restore functionality quickly without technical barriers.
Universal Fit
Compatible with major brands like GE and Whirlpool, this fuse ensures broad usability across many appliance models.
Easy Installation
Simple installation near the power cord makes it a quick fix for most DIY repairs without professional help.
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6. Microwave Fuse 6PCS – Best Bulk Supply for Pros
Microwave Fuse 6PCS
6PCS
6mm x 32mm
Slow-blow design
Ceramic body
For repair professionals or those managing multiple appliances, this six-pack offers a convenient supply of 20A 250V ceramic fuses. The slow-blow design handles temporary inrush currents effectively, ensuring your appliance does not blow unnecessarily during normal startup phases.
Pros
- 6-pack quantity
- Universal compatibility
- Premium ceramic construction
- DIY friendly
- High heat resistance
Cons
- Verify dimensions before purchase
- Check voltage rating
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Made from high-quality ceramic, these fuses provide excellent heat resistance and electrical insulation that maintain stability under demanding conditions. This premium construction ensures stable operation, giving you peace of mind that your repair will last over time without recurring issues.
The universal fit makes it easy to use across brands like Whirlpool and Kenmore, saving you from searching for specific replacements. However, always verify your old fuse's rating and dimensions before installation to ensure a proper fit within your specific microwave model.
This bulk pack saves time and money compared to single fuses, making it an ideal choice for those who frequently repair appliances. Its durability and reliable performance make it a strong option for anyone looking to keep multiple units operational simultaneously.
DIY Friendly
Simple installation process with clear guidance allows anyone to regain use of their microwave quickly and affordably.
Bulk Convenience
Keep spares on hand with a 6-pack that saves you time and money compared to buying single fuses.
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7. Pack of 10 – Best Quantity for Extensive Needs
(Pack of 10)
10 PCS
6x30mm size
Slow blow type
Quartz sand
With a solid 4.6 rating, this ten-pack provides a substantial supply of 20A 250V fuses for extensive household or professional needs. The slow-blow time delay design effectively protects circuit overcurrents while maintaining safety during high power fluctuations in your microwave appliance.
Pros
- 10 count
- Slow blow time delay
- Alloy and brass body
- Universal replacement
- Overcurrent protection
Cons
- Ensure correct size
- Check voltage rating
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Constructed with a combination of ceramic tube, alloy, and nickel-plated brass, this fuse offers excellent durability and electrical conductivity. The quartz sand filling further enhances safety and stability, ensuring the unit remains secure even under heavy operational loads over long periods.
Universal compatibility allows it to serve as a direct replacement for WB27X10388 and similar parts across multiple brands, simplifying the sourcing process. However, it is essential to confirm the exact size before purchasing to ensure a proper fit within your specific model.
Ideal for those needing a reliable stock for future repairs, this pack offers value through quantity without compromising on quality. Its robust construction and time-delay design make it a practical solution for ensuring your microwave stays operational during peak usage times.
Robust Construction
Made with ceramic tube, alloy, and nickel-plated brass, this fuse provides excellent durability for heavy-duty use.
Universal Replacement
Compatible with WB27X10388 and more, this fuse simplifies finding the right part for various microwave brands.
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8. BOJACK Pack of 20 – Best for Large-Scale Repairs
BOJACK Pack of 20
20 pcs
6x30mm size
Time-delay fuses
Plastic case
BOJACK delivers a high-quality 20-piece pack specifically designed for users who need reliable supplies for multiple microwave repairs. With a 4.6 rating, these 20A 250V slow-blow ceramic fuses offer essential protection against overloads and short circuits in household appliances.
Pros
- 20 pcs included
- 20A 250V rating
- High quality slow-blow
- Storage case included
- Universal fit
Cons
- Verify dimensions first
- Check voltage ratings
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The time-delay feature ensures temporary high currents during startup do not trigger unnecessary blows, while still providing safety against dangerous sustained overcurrents. Its compact 6x30mm size makes it a versatile fit for many models, ensuring easy replacement and seamless integration into existing circuits.
Packaged in a plastic storage case, the fuses remain organized and protected from damage during handling or transport. This convenient feature adds practical value, allowing you to keep your spare fuses ready for quick installation whenever an unexpected failure occurs.
This bulk pack is highly recommended for property managers or DIYers who prefer having a large stock on hand. The combination of durability and thoughtful packaging makes it a reliable choice for maintaining multiple appliances efficiently and cost-effectively.
Organized Storage
Included plastic storage case keeps fuses organized and safe from damage for easy access during repairs.
High Quality
High-quality slow-blow ceramic construction ensures durability and safe operation under demanding appliance conditions.
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9. Litoexpe 20-Pack – Best Safety-Focused High Amperage Fuse
Litoexpe 20-Pack
20-Pack
6x30mm size
Nickel plated brass
30-day return
Litoexpe provides a 20-Pack solution with an impressive 4.7 rating, tailored for high amperage loads like microwave ovens. The ceramic construction prevents arc flashover and reduces the risk of bursting, offering safer operation compared to standard glass body fuses.
Pros
- 20-Pack value
- Reduces arc flashover
- Prevents bursting
- Risk-free shopping
- Great replacement fuse
Cons
- Check voltage rating
- Verify fuse size
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This ceramic design prevents hot metal spray from being projected during severe overloads, significantly reducing the chance of fire hazards inside your appliance. It is particularly well-suited for devices that present massive current draw fluctuations or sudden large power surges during operation.
With a 30-day risk-free return policy and responsive support, buyers can purchase with confidence knowing their satisfaction is guaranteed. The carrying case included helps keep the fuses organized, ensuring they are ready for any future repairs that might arise unexpectedly.
Ideal for users prioritizing safety and reliability, this pack offers excellent value and peace of mind. Whether you manage multiple units or simply want reliable spares, these fuses deliver consistent performance under demanding electrical conditions.
Arc Reduction Safety
The ceramic body prevents arc flashover and reduces bursting risks compared to standard glass fuses for safer operation.
Risk-Free Assurance
A 30-day return policy and support make this a confident choice for safety-focused appliance repairs.
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10. Pack of 5 – Best Fast Blow Replacement
(Pack of 5)
5 Pack
20A 250V
Fast Blow type
Fits OEM
This 5-pack provides a robust solution for microwave repairs with a high 4.7 rating. Designed to exceed OEM requirements, these 20A 250V ceramic fuses offer reliable protection and quick installation for those needing standard replacements efficiently.
Pros
- 5 Pack quantity
- Fits OEM standards
- Fast blow safety
- Universal replacement
- Ships fast
Cons
- Verify slow vs fast
- Check compatibility
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Fast blow functionality ensures rapid power disconnection during dangerous surges or faults, protecting internal components from damage. Compatibility with a wide range of brands means you can use these universally, simplifying the process of finding the right fit for your appliance.
While most microwaves require slow-blow fuses, users should verify their original part's type to ensure safe operation. Ensuring correct compatibility prevents installation errors that could lead to repeated failures or electrical hazards during normal daily use.
Ideal for users needing a reliable replacement that ships quickly, this pack offers consistent performance. The OEM standard fit ensures safety and reliability, making it a strong choice for maintaining microwave functionality without unnecessary complications.
Fast Protection
Fast blow functionality provides rapid power disconnection during surges to protect internal components from damage.
OEM Compatibility
Guaranteed to exceed OEM requirements, this fuse ensures reliable performance across multiple appliance brands.
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Buying Guide – How to Choose the Best 20A 250V Ceramic Fuses for Microwave Ovens
Selecting the right replacement fuse is crucial for microwave safety. This guide breaks down key factors to consider.
Fuse Ratings
Ensure your new fuse matches the 20A current and 250V voltage ratings of your original. These numbers are vital for protecting your microwave from overloads without blowing unnecessarily.
Always check your old fuse or manual for exact specifications before buying a replacement.
Slow-Blow vs Fast-Blow
Most microwaves need slow-blow fuses that handle temporary startup surges. These delay blowing briefly to avoid nuisance trips during normal operation.
Confirm your appliance requires a time-delay type before purchase to prevent repeated fuse failures.
Dimensions
Typical sizes like 6x30mm must match your existing holder. Incorrect dimensions can cause poor contact or installation issues inside the appliance.
Measure your old fuse precisely to ensure a perfect fit within the fuse holder.
Material Quality
Ceramic tubes filled with quartz sand prevent arc flash and bursting. This material choice enhances safety compared to glass alternatives during electrical faults.
Look for fuses labeled as ceramic with sand fill for superior fire safety and durability.
Compatibility
Check part numbers like WB27X10388 to confirm universal fit. Many fuses work across GE, Whirlpool, and other brands if rated correctly.
Verify brand compatibility in the product listing to avoid returns due to mismatch.
Package Quantity
Buying a 5-pack or 20-pack provides value for future needs. It reduces the cost per fuse and ensures you have spares ready.
Consider bulk packs if you have multiple appliances or anticipate future repairs.
Safety Certifications
Look for CSA or other safety certifications to ensure reliability. Certified fuses meet rigorous testing standards for electrical safety.
Certified products provide extra peace of mind that they will perform as intended under stress.
Warranty
Some manufacturers offer warranties to guarantee product reliability. This adds value and support for your purchase.
A warranty indicates the brand stands behind the quality of their fuse construction and performance.
How to Use and Care for Your 20A 250V Ceramic Fuses for Microwave Ovens
Always disconnect the microwave from the power outlet before accessing the fuse holder. This ensures your safety by eliminating the risk of electric shock during the replacement process.
Remove the old fuse carefully and inspect the holder for debris or damage before inserting the new one. Clean the area if necessary to ensure a solid electrical connection.
After installing the new fuse, plug the microwave back in and test it briefly. If it works normally, store the spare fuses in a dry place for future repairs.
Frequently Asked Questions
What does a 20A 250V ceramic fuse do?
This fuse protects your microwave from overloads and short circuits. If too much current flows, it blows to disconnect power, preventing damage to internal components like the magnetron or high voltage diode.
How can I tell if my microwave fuse is blown?
A blown fuse often has a visible break in the metal filament or discolored ceramic tube. Your microwave will also stop working completely if the fuse fails to conduct electricity.
Can I use a fast-blow fuse instead of slow-blow?
No, using a fast-blow fuse in a microwave designed for slow-blow may cause it to blow during normal startup. Always match the original fuse type to prevent unnecessary interruptions.
Are these fuses safe to install myself?
Yes, replacing a fuse is a simple DIY task. Just ensure the power is unplugged and you verify the fuse specifications before installation for safety.
What brands are compatible with GE WB27X10388 fuses?
Many universal fuses work with GE, Whirlpool, Kenmore, and other major brands. Always check product descriptions for compatibility lists to ensure a proper fit.
How often should I replace my microwave fuse?
Fuses generally last indefinitely unless a surge blows them. If you frequently need replacements, check for deeper issues like wiring faults or a failing magnetron.
Final Thoughts on Choosing the Best 20A 250V Ceramic Fuses for Microwave Ovens
The BOJACK, Frienda, and BlueStars fuses lead our list due to their reliability and compatibility. They offer a balance of safety features and value for most microwave models.
When choosing a fuse, prioritize slow-blow design and precise dimensions. These factors ensure your microwave handles startup surges correctly without blowing unnecessarily.
Always check current prices and availability before purchasing. Prices fluctuate, and stock may vary depending on your location and timing.