0805 SMD question

MaineFix · 01-15-2023, 11:03 PM

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.
This community is awesome!

MaineFix · 01-15-2023, 11:18 PM

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?

UNITRAX · 01-15-2023, 11:27 PM

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

**stj** · 01-16-2023, 09:47 AM

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

01-15-2023, 11:03 PM	#1
MaineFix New Member Join Date: Jan 2023 City & State: Bucksport Maine My Country: United States I'm a: Knowledge Seeker Posts: 16	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. This community is awesome!

01-15-2023, 11:18 PM	#2
MaineFix New Member Join Date: Jan 2023 City & State: Bucksport Maine My Country: United States I'm a: Knowledge Seeker Posts: 16	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?

01-15-2023, 11:27 PM	#3
UNITRAX Member Join Date: Jan 2023 City & State: WARSAW My Country: POLAND Line Voltage: 240VAC 50Hz I'm a: Hobbyist Tech Posts: 61	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

01-16-2023, 09:47 AM	#4
stj Great Sage 齊天大聖 Join Date: Dec 2009 City & State: Europe My Country: some shithole run by Israeli agents I'm a: Professional Tech Posts: 29,107	Re: 0805 SMD question it's an inductor and should have a very low resistance

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