ampere of pico fuse

Thread Starter

minh

Joined Nov 24, 2010
24
Dear all..
By accident (short circuit) the pico fuse(dimension like as resistor 1 watt) of my wattmeter is blown . Could you help me to know value of ampere (ie: 250v 1/4 amp...) this pico fuse. the color code in photo please. In the time waiting your help can I used glass fuse for replace .Thank you so much
 

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Thread Starter

minh

Joined Nov 24, 2010
24
First Thank you to all for the time help me
Yes I am not sure it is pico fuse. But when cut ( cross-sectional) I seen outside paint + code color next metal???
and inside is white ceramic ̣??? ̣don't seen nothing magnet wire.
I tried replace with 100 ohm 1 watt but quickly too hot.
Next I replace with fuse glass 1/4 ampere is working (but not sure is alright.
 

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bertus

Joined Apr 5, 2008
20,335
Hello,

Do you have a schematic where this device is used?
The value can be 6.8 or even 0.68 Ohms.
We do not know the original color of the black ring.

Bertus
 

Markd77

Joined Sep 7, 2009
2,806
How hot is too hot?
Often 1W resistors will get very warm but still be working as intended. The reason is that the designer thought a 1/4 W would be destroyed. Even with 1/2 W dissipated by a 1W resistor it will be too hot to touch.
 
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