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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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15th Jan 2021, 7:42 am | #1 |
Triode
Join Date: Sep 2010
Location: Dubai, United Arab Emirates
Posts: 40
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Inrush Protection PTC?
Greetings
Confounded modern component....from a small SMPS. It's additional to a fusible link . Am I correct that its for Inrush Current Protection? Otherwise please enlighten me...having another senior moment. Best Wishes....Phil |
15th Jan 2021, 9:10 pm | #2 | |
Heptode
Join Date: Jan 2009
Location: West Lothian, UK.
Posts: 760
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Re: Inrush Protection PTC?
Looks like it
Quote:
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16th Jan 2021, 4:08 am | #3 |
Triode
Join Date: Sep 2010
Location: Dubai, United Arab Emirates
Posts: 40
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Re: Inrush Protection PTC?
Great.Many thanks George - useful reference too.
Mods: thread can be closed with thanks. Best Wishes,Phil |
16th Jan 2021, 6:37 am | #4 |
Heptode
Join Date: Oct 2009
Location: Melbourne Australia
Posts: 898
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Re: Inrush Protection PTC?
I don't see any confirmation on that website that the resistor element is a PTC. There is the reference to in-rush prevention, but also a reference to wire-wound resistor. The spec relates to the resistance tolerance (presumably of the part number related resistance value), and the the functioning temperature (presumably of the thermal fuse element). The in-rush descriptor could just be related to the ability of the fixed resistance to survive an in-rush.
A supporting tech sheet I just located: http://www.bayside.com.hk/catalog/im...ducts/F1K2.pdf |
16th Jan 2021, 10:03 am | #5 |
Nonode
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 2,085
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Re: Inrush Protection PTC?
Does the measured resistance change with temperature? Soldering iron or freezer spray?
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