Is this a fuse? If so, what kind? if not, what is it?

ezekielmudd, 6 months ago (edited 6 months ago)

If anyone is wondering, that glass diode package is called a MELF. I don’t know why.

They suck because they roll off the PCB during the pick and place process due to low surface area contacting with the solder paste.

I’ve had to replace so many of them.

cmnybo, 6 months ago

MELF stands for Metal Electrode Leadless Face although anyone who has had the pleasure of working with them will tell you it stands for Most End up Lying on the Floor.

ezekielmudd, 6 months ago

Hahaha!!! You are soooo very right!!!

cmnybo, 6 months ago

No, there’s no fuse here. From top to bottom, there is an electrolytic capacitor, zener diode, and a 4MHz resonator.

SpikesOtherDog, 6 months ago

Ding ding ding

For op, ZD means zener diode.

reric88, 6 months ago

Thank you for your answer. I will continue looking for the fault