When a capacitor on a PCBA explodes, does it turn black or just break into powder?

zimiaoxinghan

When a capacitor on a PCBA explodes, does it turn black or just break into powder? [Copy link]

I would like to ask all the experts, when a capacitor explodes, does it turn into white powder or turn black and burn? ?

What kind of state is it as shown in the picture?

qwqwqw2088

After the capacitor explodes, if white powder and black appear, it is probably because the fault time is too long.

The initial phenomenon is that the electrolyte will expand when heated, preventing the mouth from cracking.

qwqwqw2088

Normal capacitors, poor quality or faulty capacitors usually explode and leak.

If the positive and negative poles are installed in reverse, the consequence of powering on is large leakage current, heat, bursting, and rolls of paper pulp, because there is a double layer of capacitor paper and double layer of aluminum foil wrapped inside.

zimiaoxinghan

qwqwqw2088 posted on 2020-5-3 11:33 Normal capacitors, poor quality or faulty capacitors generally burst and leak. If the positive and negative poles are installed in reverse, the consequence of powering on is large leakage current and heat...

Moderator, looking at the picture, is it blown up and turned into powder?

zimiaoxinghan

zimiaoxinghan posted on 2020-5-3 18:00 Moderator, does the picture show that it was blown up and turned into powder?

The capacitor that turns into powder is an ordinary SMD capacitor

maychang

zimiaoxinghan posted on 2020-5-3 18:02 The capacitor that turned into powder is an ordinary SMD capacitor

There are also many types of chip capacitors.

"Turn into powder", probably a ceramic capacitor.

zimiaoxinghan

maychang posted on 2020-5-4 10:05 There are many kinds of chip capacitors. "Turned into powder", it may be a ceramic capacitor.

Thank you moderator THANKS