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Author Topic: What blew up?  (Read 1376 times)

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Offline iocowboyTopic starter

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What blew up?
« on: March 11, 2018, 09:36:27 pm »
A friend posted a picture on FB earlier asking what component broke on his DC power supply. The symbol has me thinking resistor but the leads look too long and have me confused. Thought I would bring it to you all and see what you thought.

Aditional shots...

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Offline jheatac

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Re: What blew up?
« Reply #1 on: March 11, 2018, 09:38:49 pm »
Quote from: iocowboy on March 11, 2018, 09:36:27 pm
A friend posted a picture on FB earlier asking what component broke on his DC power supply. The symbol has me thinking resistor but the leads look too long and have me confused. Thought I would bring it to you all and see what you thought.

Aditional shots...


Varister?

Sent from my SM-G920V using Tapatalk

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Offline madires

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Re: What blew up?
« Reply #2 on: March 11, 2018, 09:47:01 pm »
Possibly an NTC to limit the inrush current. It would be in series with the fuse. A varistor (MOV) would be between L and N to absorb over voltage peaks.
« Last Edit: March 12, 2018, 09:49:28 am by madires »
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Offline ArthurDent

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Re: What blew up?
« Reply #3 on: March 11, 2018, 10:00:34 pm »
As mentioned, a non-linear resistor to limit inrush current. If you are replacing a NTC make sure you check the other parts around it to make sure you don't blow the new part as well.
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Offline Fraser

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Re: What blew up?
« Reply #4 on: March 11, 2018, 10:26:04 pm »
The clue s was n the labelling...... RT1 ....... "Resistor Thermal 1"

As others have stated it is likely an NTC varistor.

Such parts often fail for a good reason.

Fraser
« Last Edit: March 11, 2018, 10:29:19 pm by Fraser »
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