Looking for a thermistor replacement

Automation and Control Sensors Transducers
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1

Hi

I am trying to find an NTC thermistor replacement. The original is from a Polk Audio PSW1000 subwoofer.

The schematic description is:

SL154R00A 3W 15% KS0021

The package is a 25mm green disc marked DSP 056

I think it is a current-limiting thermistor

Any ideas?

Cheers

Al

IMG_1987
IMG_19871125×1980 232 KB

2

Hello @al12,

Thank you for your post.

I found a few places online that mentioned the parameters, but I do not see that we carry that exact part number.

We do have one that is really close in multiple ratings.

I would suggest taking a look at our number 4316-5D2-18LC-ND.

3

Thanks, Brent!

I ordered one. It should work fine.

Cheers

Al

4

If that is true, then the part is more likely PTC.

PTC lowers current (higher R) with temperature rise, NTC raises current (lower R) with temperature rise.

5

It seems likely that the use case here is for inrush limiting, rather than overcurrent protection. In which case, the NTC action does indeed fit the bill.