Microwave Oven High Voltage Fuse Tube - 700mA
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Product Information
Full details
The TheOneStopSatShop 700mA High Voltage Fuse Tube is designed for professional technicians and experienced DIYers performing microwave oven repairs. This essential safety component protects the microwave's high-voltage circuit, offering a critical safeguard against electrical surges. Please note that microwave ovens contain capacitors that hold a lethal electrical charge even when unplugged; this product should only be handled and installed by competent personnel with appropriate electrical training.
All features
| Model Part Number | 700mA |
|---|---|
| Brand | TheOneStopSatShop |
Extended Product Information
FAQs
Can I use a 10A fuse instead of a 700mA fuse?
No. You must use the exact 700mA (0.7A) rating specified by the manufacturer. Using a higher amperage fuse will fail to protect the circuit and poses a severe fire risk.
Is this fuse compatible with all microwave brands?
It is compatible with most microwaves requiring a 38mm x 7mm 700mA/5kV fuse, but you should always verify the requirements in your specific microwave's service manual.
Why did my fuse blow?
A blown fuse is usually a symptom of another failing component, such as a faulty magnetron or a shorted high-voltage diode.
Can I touch the fuse with my bare hands?
While touching the glass is not inherently dangerous if the unit is unpowered, you should always handle electrical components with clean, dry hands or tools to prevent contamination.
Is it safe to replace this fuse myself?
Only if you are a competent technician trained in microwave repair. The high-voltage capacitor can retain a lethal charge long after the unit is unplugged.
Troubleshooting
Fuse blows immediately upon startup
Indicates an existing short circuit in the magnetron, high-voltage diode, or capacitor. Inspect these components before installing another fuse.
Fuse looks intact but microwave doesn't heat
Use a multimeter to test for continuity. Internal failure may not always be visible through the glass tube.
Pros and Cons
Pros
- Meets industry-standard specifications for microwave HV circuits
- Compact and standardized 38mm x 7mm form factor
- High 5kV voltage rating provides necessary electrical headroom
- Essential for restoring microwave functionality after a blown fuse
Cons
- High-voltage internal components present a severe electrical shock hazard
- Improper installation can lead to component damage or fire risk
- Not intended for non-qualified individuals or hobbyists without electrical safety expertise
Setup, Compatibility & Care
Before attempting any installation, ensure the microwave is disconnected from the main power supply. Crucially, the high-voltage capacitor must be manually discharged using an insulated tool designed for that purpose. Compatibility is determined by checking the physical dimensions (38mm x 7mm) and the electrical ratings (700mA/5kV) against the original manufacturer's service manual. During installation, ensure the fuse holder clips are clean and make firm contact with the fuse caps to prevent arcing due to loose connections. Keep the fuse clean and free of oils or moisture that could affect its conductivity or safety properties.