LLMGA201208T121RG Equivalent & Substitute Parts

Part Overview

The LLMGA201208T121RG is a 120 Ohm ferrite bead manufactured by Taiyo Yuden, designed for power line filtering applications in 0805 (2012 Metric) surface mount packages. This component operates at 100 MHz impedance with a maximum current rating of 2.5A and DC resistance of 32 mOhm. The part is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical characteristics, package dimensions, and operational parameters. Alternative components may be required due to inventory availability, supply chain considerations, or design optimization for specific application requirements.

Key Parameters

Parameter	Value
Impedance @ Frequency	120 Ohms @ 100 MHz
Current Rating (Max)	2.5A
DC Resistance (DCR) (Max)	32 mOhm
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Number of Lines	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters that must align with the main part LLMGA201208T121RG:

Primary Matching Criteria:

Impedance @ Frequency: 120 Ohms @ 100 MHz
Package / Case: 0805 (2012 Metric)
Mounting Type: Surface Mount
Number of Lines: 1

Secondary Compatibility Factors:

Current Rating (Max): Equal to or greater than 2.5A
DC Resistance (DCR) (Max): Equal to or less than 32 mOhm
Operating Temperature Range: Must encompass -40°C ~ 125°C minimum
RoHS Status: ROHS3 Compliant

Parts are grouped into two categories:

Category A - Direct Parametric Equivalents: Parts matching all primary criteria with identical or superior electrical performance (current rating and DCR).

Category B - Compatible Alternatives: Parts matching primary criteria with variations in secondary parameters that remain within acceptable substitution boundaries for the 0805 ferrite bead classification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Impedance @ 100 MHz	Current Rating (Max)	DCR (Max)	Package	Operating Temp	Product Status	RoHS Status
LLMGA201208T121RG	Taiyo Yuden	120 Ohms	2.5A	32 mOhm	0805 (2012 Metric)	-40°C ~ 125°C	Active	ROHS3
FBMH2012HM121-T	Taiyo Yuden	120 Ohms	2.5A	32 mOhm	0805 (2012 Metric)	-40°C ~ 125°C	Not For New Designs	ROHS3
LSMGA201208T121RG	Taiyo Yuden	120 Ohms	2.5A	32 mOhm	0805 (2012 Metric)	-40°C ~ 125°C	Active	ROHS3
742792023	Würth Elektronik	120 Ohms	3A	30 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3
BBUP00201209121Y00	Pulse Electronics	120 Ohms	5A	20 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3
BLM21PG121SN1D	Murata Electronics	120 Ohms	3A	30 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3
FBU201209T-121Y-S-H	Cal-Chip Electronics, Inc.	120 Ohms	5A	15 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	RoHS Compliant
HI0805O121R-10	Laird-Signal Integrity Products	120 Ohms	3.5A	20 mOhm	0805 (2012 Metric)	-40°C ~ 125°C	Active	ROHS3
ILHB0805ER121V	Vishay Dale	120 Ohms	5A	20 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3
BBUP00201209101Y00	Pulse Electronics	100 Ohms	5A	20 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3
MPZ2012S101AT000	TDK Corporation	100 Ohms	4A	20 mOhm	0805 (2012 Metric)	-55°C ~ 125°C	Active	ROHS3

Engineering Selection Recommendations

Category A - Direct Parametric Equivalents (Recommended for Replacement):

LSMGA201208T121RG (Taiyo Yuden) is the primary recommended substitute. This part maintains identical electrical specifications (120 Ohms @ 100 MHz, 2.5A, 32 mOhm DCR) and package dimensions. Product status is Active, ensuring continued availability and support. ROHS3 compliance and MSL rating match the original specification.

Category B - Compatible Alternatives (Acceptable with Design Verification):

The following parts meet the 120 Ohm @ 100 MHz impedance requirement in 0805 package with enhanced electrical performance:

742792023 (Würth Elektronik WE-CBF series) provides 3A current rating and 30 mOhm DCR with extended temperature range (-55°C ~ 125°C). Active product status ensures supply continuity.

BBUP00201209121Y00 (Pulse Electronics BBUP series) offers 5A current rating and 20 mOhm DCR with extended temperature range. Active status and ROHS3 compliance confirmed.

BLM21PG121SN1D (Murata Electronics EMIFIL BLM21 series) delivers 3A current rating and 30 mOhm DCR with extended temperature range. Active product status and ROHS3 compliance verified.

FBU201209T-121Y-S-H (Cal-Chip Electronics FBU series) provides 5A current rating and 15 mOhm DCR with extended temperature range. Active status confirmed with RoHS compliance.

HI0805O121R-10 (Laird-Signal Integrity Products) offers 3.5A current rating and 20 mOhm DCR. Operating temperature range matches original specification (-40°C ~ 125°C). Active status and ROHS3 compliance confirmed.

ILHB0805ER121V (Vishay Dale ILHB series) provides 5A current rating and 20 mOhm DCR with extended temperature range. Active product status and ROHS3 compliance verified.

Parts Not Recommended for Direct Substitution:

FBMH2012HM121-T (Taiyo Yuden FB series) matches all electrical parameters but carries "Not For New Designs" product status, indicating obsolescence trajectory.

BBUP00201209101Y00 (Pulse Electronics) and MPZ2012S101AT000 (TDK Corporation) feature 100 Ohm impedance, which deviates from the 120 Ohm specification of the main part and is not suitable for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can LSMGA201208T121RG be used as a direct replacement for LLMGA201208T121RG?

A: Yes. LSMGA201208T121RG is a direct parametric equivalent manufactured by Taiyo Yuden with identical impedance (120 Ohms @ 100 MHz), current rating (2.5A), DC resistance (32 mOhm), package dimensions (0805), and operating temperature range (-40°C ~ 125°C). Both parts are Active product status with ROHS3 compliance.

Q: What is the difference between the main part and FBMH2012HM121-T?

A: FBMH2012HM121-T is electrically identical to LLMGA201208T121RG in all parameters. The primary distinction is product status: FBMH2012HM121-T is classified as "Not For New Designs," indicating the manufacturer is transitioning away from this part number. For new designs, LSMGA201208T121RG or other Active status alternatives are preferred.

Q: Can parts with higher current ratings substitute for the LLMGA201208T121RG?

A: Yes. Parts with current ratings exceeding 2.5A (such as BBUP00201209121Y00 at 5A or FBU201209T-121Y-S-H at 5A) are compatible substitutes provided all other parameters match: 120 Ohms @ 100 MHz impedance, 0805 package, and surface mount configuration. Higher current ratings provide design margin without compromising performance.

Q: Are there differences in DC resistance among the substitute parts?

A: Yes. The main part LLMGA201208T121RG specifies 32 mOhm maximum DCR. Several substitutes feature lower DCR values: BBUP00201209121Y00, FBU201209T-121Y-S-H, HI0805O121R-10, and ILHB0805ER121V all specify 20 mOhm maximum DCR. Lower DCR values reduce power dissipation and heat generation, representing improved performance.

Q: What is the significance of the operating temperature range differences?

A: The main part operates from -40°C to 125°C. Several substitutes extend the lower temperature limit to -55°C, providing broader environmental compatibility. If the application requires operation only within -40°C to 125°C, both the original and extended-range alternatives are suitable. Extended-range parts offer additional design flexibility without penalty.

Q: Why are BBUP00201209101Y00 and MPZ2012S101AT000 listed but not recommended?

A: These parts feature 100 Ohm impedance at 100 MHz, whereas the main part specifies 120 Ohms. This 20 Ohm difference represents a 16.7% deviation in filtering characteristics and is not suitable for direct replacement in applications requiring 120 Ohm impedance. These parts are listed in the provided data but do not meet the primary substitution criterion.

Q: What packaging formats are available for these ferrite beads?

A: All listed parts are available in 0805 (2012 Metric) surface mount package. Packaging options vary by manufacturer: Taiyo Yuden parts are supplied in Tape & Reel (TR), Würth Elektronik and Murata Electronics offer Cut Tape (CT) & Digi-Reel®, while Vishay Dale provides Cut Tape (CT) & Digi-Reel® format. Tape & Reel format is standard for high-volume production applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification except FBU201209T-121Y-S-H, which is specified as "RoHS Compliant" without the specific ROHS3 designation. For applications requiring ROHS3 certification, verify FBU201209T-121Y-S-H compliance with the specific regulatory requirement or select from the ROHS3-certified alternatives.

Q: What is the moisture sensitivity level (MSL) for these ferrite beads?

A: The main part LLMGA201208T121RG specifies MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. All Taiyo Yuden, Würth Elektronik, Pulse Electronics, Murata Electronics, and Vishay Dale substitutes also specify MSL 1 (Unlimited). HI0805O121R-10 (Laird-Signal Integrity Products) specifies MSL as "Not Applicable," indicating no moisture sensitivity concern. All parts are suitable for standard PCB assembly processes without special moisture control requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message