ACML-0805-501-T Ferrite Bead 500 Ohm 0805 Equivalent & Substitute Parts

Part Overview

The ACML-0805-501-T is a single-line ferrite bead manufactured by Abracon LLC in the 0805 (2012 Metric) surface mount package. This component provides 500 Ohms of impedance at 100 MHz with a maximum current rating of 500mA and 300mOhm DC resistance. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters, package dimensions, and thermal operating range to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Impedance @ 100 MHz	500 Ohms
Current Rating (Max)	500mA
DC Resistance (Max)	300mOhm
Package / Case	0805 (2012 Metric)
Operating Temperature Range	-55°C to 125°C
Mounting Type	Surface Mount
Number of Lines	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ACML-0805-501-T are grouped based on impedance value at 100 MHz. The primary substitution criteria are:

Exact Impedance Match (500 Ohms @ 100 MHz): No direct 500 Ohm equivalents are available in the provided substitute list.

Near-Impedance Substitutes (470-600 Ohms @ 100 MHz): Parts with impedance values of 470 Ohms or 600 Ohms at 100 MHz are functionally equivalent when circuit design permits impedance tolerance. All substitute parts maintain the same 0805 package, single-line configuration, operating temperature range (-55°C to 125°C), and ROHS3 compliance. Current rating and DC resistance values vary by manufacturer and series, with some substitutes offering improved performance characteristics (lower DCR, higher current capacity).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DC Resistance (Max)	Product Status	Packaging
ACML-0805-501-T	Abracon LLC	500 Ohms	500mA	300mOhm	Active	Tape & Reel (TR)
7427920415	Würth Elektronik	600 Ohms	500mA	300mOhm	Active	Cut Tape (CT) & Digi-Reel®
BBGK00201209601Y00	Pulse Electronics	600 Ohms	500mA	250mOhm	Active	Tape & Reel (TR)
BK2125HM471-T	Taiyo Yuden	470 Ohms	500mA	250mOhm	Obsolete	Cut Tape (CT)
BLM21AG471SN1D	Murata Electronics	470 Ohms	700mA	190mOhm	Active	Cut Tape (CT) & Digi-Reel®
BLM21AG601SN1D	Murata Electronics	600 Ohms	600mA	210mOhm	Active	Cut Tape (CT) & Digi-Reel®
FB201209T-471Y-S	Cal-Chip Electronics, Inc.	470 Ohms	700mA	180mOhm	Active	Tape & Reel (TR)
FB201209T-601Y-S-1	Cal-Chip Electronics, Inc.	600 Ohms	500mA	300mOhm	Active	Tape & Reel (TR)
MMZ2012R601AT000	TDK Corporation	600 Ohms	500mA	200mOhm	Last Time Buy	Cut Tape (CT)
MMZ2012S601AT000	TDK Corporation	600 Ohms	500mA	300mOhm	Last Time Buy	Cut Tape (CT)
MMZ2012Y601BT000	TDK Corporation	600 Ohms	500mA	200mOhm	Last Time Buy	Cut Tape (CT)

Engineering Selection Recommendations

Active Production Parts: For new designs and ongoing production, select from parts with Active product status: 7427920415 (Würth Elektronik), BBGK00201209601Y00 (Pulse Electronics), BLM21AG471SN1D (Murata Electronics), BLM21AG601SN1D (Murata Electronics), FB201209T-471Y-S (Cal-Chip Electronics), and FB201209T-601Y-S-1 (Cal-Chip Electronics). These parts ensure long-term supply availability and manufacturer support.

Last Time Buy Parts: MMZ2012R601AT000, MMZ2012S601AT000, and MMZ2012Y601BT000 from TDK Corporation are designated Last Time Buy. These parts remain available but with limited future production. Use only when existing inventory is sufficient or when design constraints require specific TDK characteristics.

Obsolete Parts: BK2125HM471-T from Taiyo Yuden is obsolete. Avoid for new designs unless existing stock is available and supply chain risk is acceptable.

Compliance: All listed parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the original ACML-0805-501-T specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 600 Ohm ferrite bead instead of the 500 Ohm ACML-0805-501-T?

A: Yes, if circuit design permits. The 600 Ohm impedance value is 20% higher than the 500 Ohm specification. Substitution is valid when the application tolerates this impedance variation. Verify with circuit simulation or testing that EMI filtering performance remains acceptable.

Q: Can I use a 470 Ohm ferrite bead instead of the 500 Ohm ACML-0805-501-T?

A: Yes, if circuit design permits. The 470 Ohm impedance value is 6% lower than the 500 Ohm specification. Substitution is valid when the application tolerates this impedance variation. Verify with circuit simulation or testing that EMI filtering performance remains acceptable.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Both packaging formats contain the same component in the same 0805 package. Cut Tape (CT) is supplied in strips for manual handling or small-volume assembly. Tape & Reel (TR) is supplied on continuous reels for automated pick-and-place assembly equipment. Select based on assembly process requirements.

Q: Are Murata BLM21AG series parts direct replacements?

A: BLM21AG471SN1D (470 Ohms) and BLM21AG601SN1D (600 Ohms) are functionally equivalent in the 0805 package with identical operating temperature range. The BLM21AG series offers improved DC resistance characteristics (190mOhm and 210mOhm respectively) compared to the original 300mOhm specification, and higher current ratings (700mA and 600mA respectively). These improvements make them suitable substitutes when impedance tolerance is acceptable.

Q: Why are some substitute parts marked Last Time Buy?

A: Last Time Buy designation indicates the manufacturer has announced end-of-life production. These parts remain available from existing inventory but future production is limited or discontinued. For long-term supply security, prioritize Active status parts.

Q: Do all substitute parts have the same physical dimensions?

A: All listed parts use the 0805 (2012 Metric) package with identical length (0.079" / 2.00mm) and width (0.047" to 0.049" / 1.20mm to 1.25mm). Height varies slightly (0.041" to 0.043" / 1.05mm to 1.10mm) but remains within standard 0805 package tolerances. PCB footprints are compatible across all parts.

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