Samsung 650mA 0.65A 5kV Microwave Oven High Voltage Fuse & Holder, DE91-70061J
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LG high quality genuine 800mA, 0.8A, 5kV high voltage fuse assembly for modern microwave ovens.
This particular fuse is a little different from other high voltage fuses. It clips directly on to the spade terminal of the high voltage transformer, there is a 4.7mm spade terminal built into the fuse housing.
The flying lead then connects to the high voltage capacitor. This particular style of fuse is commonly fitted to many brands of ovens that originate from supermarkets.
It is also used in some Panasonic, LG and DeLonghi models. If your fuse looks the same as this one then it will almost certainly fit. Check carefully the spade sizes in your oven as the fuse end has a 4.7mm terminal whilst the red lead end is 6.3mm.
Compare the specifications and dimensions given below:
- Fuse rating 0.8A - 800mA
- Voltage rating: 5kV - 5000V
- Fuse body length: 63mm
- Fuse body width:12mm
- Fuse body depth: 16mm
- Lead length: 115mm
- Terminations : 1 x 6.3mm spade terminal at lead end, 1 x 4.7mm spade terminal at fuse end
The high voltage fuse is wired in series with the high voltage feed from the high voltage transformer to the magnetron. The fuse will fail if there is a fault in the high voltage circuit.
Such a fault could be a short circuit magnetron or a short circuit high voltage rectifier. In our experience however the fuse commonly fails for no apparent reason.
The fuse just gets stressed every time the magnetron starts which eventually leads to its demise. It is also common for the fuse to fail if the microwave cooking cycle is started with nothing in the cavity. Sparking can occur in the cavity if a metal object, eg a spoon, is left in during the microwave cooking cycle and this can also lead to the fuse failing. In almost every case replacement of this fuse will get your oven back to full working order.
If you have a microwave with this type of fuse then the symptom you will get if it has failed is no cooking action. The microwave will appear to start and countdown the time but there will be no heating action. The fuse is easy to check visibly by unclipping the plastic housing apart. You can then visually examine the wire in the fuse to see if it has broken. For the more technically minded a continuity check with an ohm meter will also check the fuse. A short circuit reading should be obtained if the fuse is intact.
This type of fuse is fitted to many brands of microwaves and this particular type of fuse is suitable for replacement in any brand. Check the rating of the original fuse and replace with the correct value. This listing is for the 800mA version but other values and types are available in our microwave parts section.
To fit this fuse it is necessary to remove the outer casing so replacement should only be attempted by those who have experience in the repair of electrical appliances. High voltages are present in a microwave oven and it is important that the appliance is disconnected from the mains before any servicing work is carried out.
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