ACML-0402-310-T Ferrite Bead Equivalent & Substitute Parts

Part Overview

The ACML-0402-310-T is a 31 Ohm ferrite bead manufactured by Abracon LLC in 0402 (1005 Metric) surface mount package. This component provides electromagnetic interference (EMI) suppression for single-line applications with a maximum current rating of 300mA and DC resistance of 200mOhm. The part is Active status and ROHS3 compliant.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative sourcing improves supply chain resilience, or when design requirements allow for parametric equivalents that meet or exceed the original specifications.

Key Parameters

Parameter	Value
Impedance @ Frequency	31 Ohms @ 100 MHz
Current Rating (Max)	300mA
DC Resistance (DCR) (Max)	200mOhm
Package / Case	0402 (1005 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute ferrite beads for the ACML-0402-310-T are qualified based on the following criteria:

Impedance within 30-31 Ohms @ 100 MHz (±3% tolerance acceptable for EMI suppression applications)
Current rating of 300mA or higher
DC resistance of 200mOhm or lower
0402 (1005 Metric) package footprint
Operating temperature range of -55°C to 125°C or wider
Surface mount configuration
ROHS3 compliance or equivalent environmental certification

All substitute parts listed meet these electrical and mechanical parameters and are suitable for direct replacement in applications where the original part is unavailable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Product Status	RoHS Status
ACML-0402-310-T	Abracon LLC	31 Ohms	300mA	200mOhm	0402 (1005 Metric)	Active	ROHS3 Compliant
7427927130	Würth Elektronik	30 Ohms	300mA	150mOhm	0402 (1005 Metric)	Obsolete	ROHS3 Compliant
BBSY00100505300Y00	Pulse Electronics	30 Ohms	500mA	200mOhm	0402 (1005 Metric)	Active	ROHS3 Compliant
BMC1EY0030AN	TE Connectivity Passive Product	30 Ohms	300mA	200mOhm	0402 (1005 Metric)	Active	ROHS3 Compliant
FB100505T-300Y-S	Cal-Chip Electronics, Inc.	30 Ohms	300mA	200mOhm	0402 (1005 Metric)	Active	RoHS Compliant
GZ1005U300TF	Shenzhen Sunlord Electronics Co., Ltd.	30 Ohms	300mA	200mOhm	0402 (1005 Metric)	Active	ROHS3 Compliant
MU1005-300Y	Bourns Inc.	30 Ohms	300mA	200mOhm	0402 (1005 Metric)	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical requirements for direct replacement of the ACML-0402-310-T. Selection should prioritize parts with Active product status for long-term availability assurance.

The Würth Elektronik 7427927130 carries Obsolete status and should be avoided for new designs despite superior DC resistance characteristics (150mOhm vs. 200mOhm).

BBSY00100505300Y00 from Pulse Electronics offers higher current rating (500mA) while maintaining equivalent impedance and DC resistance, providing additional design margin for applications with variable current demands.

BMC1EY0030AN, FB100505T-300Y-S, GZ1005U300TF, and MU1005-300Y all provide equivalent performance with Active status and full compliance certifications. These parts are suitable for immediate substitution.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 30 Ohm ferrite bead for the original 31 Ohm specification?

A: Yes. The 1 Ohm difference represents approximately 3% impedance variation, which is within acceptable tolerance for EMI suppression applications where ferrite beads operate. Both impedance values provide equivalent filtering performance at 100 MHz.

Q: What is the significance of DC resistance (DCR) differences between parts?

A: DC resistance affects signal insertion loss and heat dissipation. Lower DCR values (150mOhm vs. 200mOhm) reduce power loss and heat generation. Parts with equal or lower DCR than the original specification are suitable substitutes.

Q: Are all substitute parts pin-compatible with the original ACML-0402-310-T?

A: Yes. All listed substitutes use the identical 0402 (1005 Metric) surface mount package with the same footprint, pad spacing, and mounting configuration. No PCB layout modifications are required.

Q: Why should I avoid the Würth Elektronik 7427927130 despite its lower DC resistance?

A: The 7427927130 carries Obsolete product status, indicating discontinued manufacturing and limited future availability. For new designs and long-term production, Active status parts ensure supply chain continuity.

Q: Does higher current rating (500mA) in the BBSY00100505300Y00 affect compatibility?

A: No. Higher current rating indicates the part can safely handle greater current without exceeding thermal or electrical limits. This provides additional design margin and is fully compatible with applications designed for 300mA operation.

Q: Are all substitute parts ROHS3 compliant?

A: Six of seven substitute parts are ROHS3 compliant. The FB100505T-300Y-S carries RoHS Compliant certification, which meets environmental requirements. All parts are suitable for applications requiring RoHS compliance.

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