Author Topic: Need help identifying strange looking device (cap, fuse??)  (Read 678 times)

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Offline AlfBaz

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I thought we had a sticky thread for this but apparently not, so here's another :-[

This board has 2 ohms across the dc bus just before the switching IC.
22VAC into some caps, common mode choke, rectifier and large filtering cap.
Hanging off the positive side of the cap with the other side heading off back down to the common mode choke area is this device.

Any ideas?





« Last Edit: May 11, 2018, 10:26:53 am by AlfBaz »
 

Offline aargee

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #1 on: May 11, 2018, 12:19:22 pm »
There is a thread over in General Chat. I’ve seen these before and assumed they were some sort of transient protective devices?
Not easy, not hard, just need to be incentivised.
 

Offline Jwillis

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #2 on: May 11, 2018, 09:29:53 pm »
Polyswitch Re-settable Fuse. Unable to find match sorry.
 

Offline AlfBaz

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #3 on: May 11, 2018, 11:50:17 pm »
Thanks guys. I'll start searching under those terms :-+
 

Offline PTR_1275

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #4 on: May 12, 2018, 12:07:21 am »
Search Bourns PPTC and you’ll find the series



Edit
Looks like a MF-SM030

http://www.farnell.com/datasheets/2038620.pdf
« Last Edit: May 12, 2018, 12:10:45 am by PTR_1275 »
 

Offline AlfBaz

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #5 on: May 12, 2018, 12:14:57 am »
That was quick.
It's a Bourns MF-SM Series PTC resettable 0.3A Fuse (030 = 0.3) B is the Bourns logo and H5 is the date code
http://au.element14.com/bourns/sm100-2/multifuse-smd-1-1a/dp/9350225?st=resetable%20fuse

Thanks again

edit - PTR_1275, you beat me to it :)
 

Offline AlfBaz

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Re: Need help identifying strange looking device (cap, fuse??)
« Reply #6 on: May 12, 2018, 12:22:33 am »
It is a sticky thread over in General Chat What's this please?
 


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