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Topic: Identify the resistor type (Read 176 times) previous topic - next topic

Shandy

Can anyone tell me a little about these resistors such as type and characteristics.

Regards, Chris.

MrMark

#1
May 10, 2019, 07:12 pm Last Edit: May 10, 2019, 08:22 pm by MrMark
OP's photo:


I believe those (R1-R8) are Metal-Oxide Varistors (MOV) intended to suppress large voltage transients coming in on the serial interface lines.

https://www.littelfuse.com/~/media/electronics/.../littelfuse_varistor_catalog.pdf.pdf

MarkT

Given the big chip is a quad UART with FIFO, this is likely a modem board and they are almost certainly MOVs to protect from lightning and other voltage spikes as MrMark suggests.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Paul__B

Which indicates this is not your average consumer-grade interface card by any stretch of the imagination.

Shandy

You would be correct this is from a particle size analyser interface controller used in the labs I wanted to bin the electronics inside because the enclosures are stainless steel.

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