Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

50 Ohm NTC will degrade over the years?

Flyback

Well-Known Member
Hi,
Our customer is using the 50Ohm B57236S0500M000
NTC in many of his offline SMPS. Eg in the attached
24v, 1A, 90-265VAC flyback.

Do you agree that this NTC can handle up to 1.9A rms?
I wondered if there is some temperature ambient to which that corresponds?
You would think NTCs would degrade over the years as they always run hot?

B57236S0500M000 NTC

The datasheet shows at 65degc it has a res of some 14R. The Arms is 0.524A in the above flyback case. That would mean 3.84W...which would heat it up more, and reduce its res, but then its also running hotter...
 

Attachments

  • Flyback _CCM _NTC 50R.asc
    7.4 KB · Views: 75
Last edited:

Latest threads

New Articles From Microcontroller Tips

Back
Top