ACML-0201-121-T Ferrite Bead 120 Ohm 0201 Equivalent & Substitute Parts

Part Overview

The ACML-0201-121-T is a ferrite bead manufactured by Abracon LLC, designed for electromagnetic interference (EMI) suppression in 0201 (0603 metric) surface mount applications. This component provides 120 Ohms impedance at 100 MHz with a maximum current rating of 200mA and 800mOhm DC resistance. The part is Active status and ROHS3 compliant, suitable for power and signal line filtering in compact circuit designs. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the 0201 package form factor.

Key Parameters

Parameter	Value
Manufacturer Part Number	ACML-0201-121-T
Manufacturer	Abracon LLC
Impedance @ Frequency	120 Ohms @ 100 MHz
Current Rating (Max)	200mA
DC Resistance (Max)	800mOhm
Package / Case	0201 (0603 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the ACML-0201-121-T are qualified based on the following critical parameters:

Primary Matching Criteria:

Impedance value: 120 Ohms @ 100 MHz (exact match required)
Package form factor: 0201 (0603 Metric) (exact match required)
Current rating: 200mA minimum
Operating temperature range: -55°C ~ 125°C (minimum)
Mounting type: Surface Mount
RoHS compliance: ROHS3 Compliant

Secondary Consideration:

DC resistance values between 440mOhm and 800mOhm are acceptable within the electrical performance envelope for this impedance class and frequency specification.

Parts meeting all primary criteria are classified as direct parametric equivalents. Parts with 100 Ohm impedance at 100 MHz are listed as related alternatives for applications where lower impedance filtering is acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Package	Height (Max)	RoHS Status	Product Status
ACML-0201-121-T	Abracon LLC	120 Ohms	200mA	800mOhm	0201 (0603 Metric)	0.014" (0.35mm)	ROHS3 Compliant	Active
742692003	Würth Elektronik	120 Ohms	200mA	450mOhm	0201 (0603 Metric)	0.013" (0.33mm)	ROHS3 Compliant	Active
BLM03AG121SN1D	Murata Electronics	120 Ohms	200mA	500mOhm	0201 (0603 Metric)	0.013" (0.33mm)	ROHS3 Compliant	Active
BLM03BD121SN1D	Murata Electronics	120 Ohms	250mA	500mOhm	0201 (0603 Metric)	0.013" (0.33mm)	ROHS3 Compliant	Active
BMC1HY0120AN	TE Connectivity Passive Product	120 Ohms	200mA	450mOhm	0201 (0603 Metric)	0.013" (0.33mm)	Not specified	Active
FB060303T-121Y-S	Cal-Chip Electronics, Inc.	120 Ohms	200mA	450mOhm	0201 (0603 Metric)	0.013" (0.33mm)	RoHS Compliant	Active
GZ0603D121TF	Shenzhen Sunlord Electronics Co., Ltd.	120 Ohms	200mA	800mOhm	0201 (0603 Metric)	0.014" (0.35mm)	ROHS3 Compliant	Active
MMZ0603A121ET000	TDK Corporation	120 Ohms	250mA	440mOhm	0201 (0603 Metric)	0.013" (0.33mm)	ROHS3 Compliant	Active
MMZ0603S121CT000	TDK Corporation	120 Ohms	200mA	450mOhm	0201 (0603 Metric)	0.013" (0.33mm)	ROHS3 Compliant	Active
BMC1HY0100AN	TE Connectivity Passive Product	100 Ohms	200mA	400mOhm	0201 (0603 Metric)	0.013" (0.33mm)	Not specified	Active
FB060303T-101Y-S	Cal-Chip Electronics, Inc.	100 Ohms	200mA	400mOhm	0201 (0603 Metric)	0.013" (0.33mm)	RoHS Compliant	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (120 Ohms @ 100 MHz, 200mA minimum):

Parts 742692003, BLM03AG121SN1D, BMC1HY0120AN, FB060303T-121Y-S, and MMZ0603S121CT000 provide direct electrical equivalence to the ACML-0201-121-T with matching impedance, current rating, and package specifications. All listed parts maintain Active product status. Parts with ROHS3 compliance certification (742692003, BLM03AG121SN1D, FB060303T-121Y-S, MMZ0603S121CT000, GZ0603D121TF, MMZ0603A121ET000) meet current regulatory requirements. GZ0603D121TF and MMZ0603A121ET000 offer higher current ratings (250mA) while maintaining 120 Ohm impedance, providing additional design margin in current-sensitive applications.

Related Alternatives (100 Ohms @ 100 MHz):

BMC1HY0100AN and FB060303T-101Y-S provide 100 Ohm impedance at 100 MHz in the same 0201 package. These parts are suitable for applications where lower impedance filtering is acceptable and where the 20 Ohm reduction in impedance does not compromise circuit performance.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 100 Ohm ferrite bead for the 120 Ohm ACML-0201-121-T?

A: Substitution depends on circuit requirements. The 100 Ohm parts (BMC1HY0100AN, FB060303T-101Y-S) provide lower impedance filtering. If the circuit design specifies 120 Ohm impedance for specific frequency response or EMI suppression characteristics, a 100 Ohm substitute may alter circuit performance. Verify circuit specifications before substitution.

Q: What is the significance of DC resistance (DCR) variation among substitute parts?

A: DC resistance values range from 440mOhm to 800mOhm across the listed parts. Lower DCR reduces power dissipation and voltage drop across the ferrite bead at rated current. Parts with 440mOhm to 500mOhm DCR (742692003, BLM03AG121SN1D, BMC1HY0120AN, FB060303T-121Y-S, MMZ0603A121ET000, MMZ0603S121CT000) dissipate less heat than the original 800mOhm specification. Selection should consider thermal budget and signal integrity requirements.

Q: Are all substitute parts available in the same packaging format?

A: All listed 120 Ohm equivalents are available in 0201 (0603 Metric) surface mount packages. Packaging options vary by manufacturer: Abracon LLC and Würth Elektronik supply Tape & Reel (TR), Murata Electronics offers both Cut Tape (CT) and Tape & Reel formats, TE Connectivity provides Cut Tape (CT), Cal-Chip Electronics and TDK Corporation supply Tape & Reel (TR). Verify packaging availability with your supplier for production requirements.

Q: What is the height difference between substitute parts?

A: The ACML-0201-121-T has a maximum height of 0.014" (0.35mm). Most substitute parts measure 0.013" (0.33mm) maximum height, providing 0.001" (0.02mm) lower profile. GZ0603D121TF matches the original 0.014" (0.35mm) height. Height differences are negligible for most PCB assembly applications but should be verified for space-constrained designs.

Q: Which substitute parts have the highest current rating?

A: BLM03BD121SN1D and MMZ0603A121ET000 both support 250mA maximum current, compared to the original 200mA specification. These parts provide 25% additional current capacity while maintaining 120 Ohm impedance and 0201 package form factor.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for 742692003, BLM03AG121SN1D, BLM03BD121SN1D, GZ0603D121TF, MMZ0603A121ET000, and MMZ0603S121CT000. BMC1HY0120AN and BMC1HY0100AN do not specify RoHS status in provided data. FB060303T-121Y-S and FB060303T-101Y-S are listed as RoHS Compliant without specific ROHS3 designation. Verify compliance documentation with manufacturers for regulated applications.

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