This is the popular RS-485 module found in the market, how can I identify the polyfuse/heat recovery fuse in it? Also its manufacturer or electrical ratings?

photo of RS-485 module

  • 1
    \$\begingroup\$ Might be Bourns \$\endgroup\$
    – Andy aka
    Oct 29, 2020 at 10:25

1 Answer 1


Could be Bourns MF-MSMF Series, specifically MF-MSMF010

Mouser link

60V DC Max
100mA Hold
300mA Trip

Part Marking

MF-MSMF Series Datasheet


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.