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Old 01-15-2023, 11:03 PM   #1
MaineFix
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Question 0805 SMD question

Please correct me if I am wrong.

I have what I believe is a capacitor. 0805 size.
I have a full book of 0805 SMD so I'm pretty sure I have the one I need.

I'm trying to identify what this is:

HCB2012KF-121T50_0805
5A 1 20m 25% 120@100MHz 0805 Ferrite Beads ROHS

Could someone explain to me how to read this?

Thank you in advanced.
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Old 01-15-2023, 11:18 PM   #2
MaineFix
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Default Re: 0805 SMD question

Okay, so I believe this is a ferrite bead which is just a component that reduces interference. So if I test both sides of this component should it be open as if it is a wire straight through?
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Old 01-15-2023, 11:27 PM   #3
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Default Re: 0805 SMD question

Maybe this will help:

https://www.schukat.com/schukat/schu...1SN1D&wg=D5419

A ferrite bead is also commonly called a ferrite clamp. It's a passive device that improves your PCB's power quality, designed to suppress high-frequency signals on a power-supply line. They're typically placed around a power supply / ground line pair that's incoming to a specific device.
Their principle use is as an EMI filter on power inputs, often on the input to a common-mode EMI filter circuit.

BLM21AG121SN1D

https://www.schukat.com/schukat/schukat_cms_en.nsf/index/CMSDF15D356B046D53BC1256D550038A9E0?OpenDocument&w g=D5419
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Old 01-16-2023, 09:47 AM   #4
stj
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Default Re: 0805 SMD question

it's an inductor and should have a very low resistance
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