LSMCA201208T330RG Ferrite Bead Equivalent & Substitute Parts

Part Overview

The LSMCA201208T330RG is a 33 Ohm power line ferrite bead manufactured by Taiyo Yuden in the 0805 (2012 Metric) surface mount package. This component is designed for electromagnetic interference (EMI) suppression in power distribution circuits, operating at 100 MHz impedance with a maximum current rating of 4A and 8mOhm DC resistance. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design specifications allow for functionally identical components from different manufacturers that meet the same electrical and mechanical parameters.

Key Parameters

Parameter	Value
Impedance @ Frequency	33 Ohms @ 100 MHz
Current Rating (Max)	4A
DC Resistance (DCR) (Max)	8mOhm
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Filter Type	Power Line
Number of Lines	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LSMCA201208T330RG is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Impedance value: 33 Ohms @ 100 MHz
Current rating: 4A maximum
DC resistance: 8mOhm maximum

Mechanical Parameters:

Package type: 0805 (2012 Metric)
Mounting type: Surface Mount
Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
Maximum height: 0.041" (1.05mm)

Compliance Parameters:

RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)
REACH unaffected status

Parts meeting all these parameters are classified as parametric equivalents. Variations in product status, packaging format (Tape & Reel versus Cut Tape), or filter type classification (Power Line versus Signal Line) do not affect functional substitutability when all electrical and mechanical parameters remain identical.

Parameter Comparison

Parameter	LSMCA201208T330RG (Taiyo Yuden)	FBMJ2125HM330-T (Taiyo Yuden)	742792012 (Würth Elektronik)	Z0805C330BPWST (KEMET)
Impedance @ Frequency	33 Ohms @ 100 MHz	33 Ohms @ 100 MHz	33 Ohms @ 100 MHz	33 Ohms @ 100 MHz
Current Rating (Max)	4A	4A	4A	4A
DC Resistance (DCR) (Max)	8mOhm	8mOhm	8mOhm	8mOhm
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.047" W (2.00mm x 1.20mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)
Height (Max)	0.041" (1.05mm)	0.041" (1.05mm)	0.043" (1.10mm)	0.041" (1.05mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Not For New Designs	Active	Obsolete

Engineering Selection Recommendations

FBMJ2125HM330-T (Taiyo Yuden): This part is a parametric equivalent with identical electrical and mechanical specifications to the LSMCA201208T330RG. However, the product status is listed as "Not For New Designs," indicating that Taiyo Yuden does not recommend this part for new circuit designs. Selection of this part is appropriate only for replacement or maintenance applications where the original part number is unavailable and design changes are not feasible.

742792012 (Würth Elektronik): This part meets all critical electrical parameters and maintains RoHS3 compliance. The operating temperature range extends to -55°C, providing a wider lower temperature specification than the primary part. The maximum height is 0.043" (1.10mm) compared to 0.041" (1.05mm) for the primary part, representing a 0.05mm increase. The product status is Active, making this part suitable for new designs. The filter type classification differs (Signal Line versus Power Line), but this distinction does not affect functional substitutability given identical impedance and current specifications.

Z0805C330BPWST (KEMET): This part is electrically and mechanically equivalent to the LSMCA201208T330RG with matching impedance, current rating, DC resistance, and physical dimensions. The product status is listed as Obsolete, indicating this part is no longer in production. Selection of this part is not recommended for new designs or long-term supply chain planning.

For new designs, 742792012 is the recommended substitute, as it maintains Active product status and provides extended temperature range capability. For replacement applications where design changes are not permitted, FBMJ2125HM330-T provides identical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can FBMJ2125HM330-T be used as a direct replacement for LSMCA201208T330RG?

A: Yes, FBMJ2125HM330-T is a parametric equivalent with identical impedance (33 Ohms @ 100 MHz), current rating (4A), DC resistance (8mOhm), package type (0805), and operating temperature range (-40°C ~ 125°C). The primary difference is product status; FBMJ2125HM330-T is marked "Not For New Designs." Direct substitution is functionally valid for replacement applications.

Q: What is the difference between the Power Line and Signal Line filter type classifications?

A: Filter type classification indicates the intended application circuit topology. Power Line ferrite beads are designed for power distribution circuits, while Signal Line beads are designed for signal integrity applications. However, when electrical parameters (impedance, current rating, DC resistance) are identical, both types perform the same filtering function. The 742792012 (Signal Line) is functionally equivalent to the LSMCA201208T330RG (Power Line) for substitution purposes.

Q: Why does 742792012 have a maximum height of 0.043" instead of 0.041"?

A: The 0.002" (0.05mm) height difference is within typical manufacturing tolerances for 0805 package ferrite beads. This minor variation does not affect PCB layout compatibility or component placement in standard surface mount assembly processes. Both parts conform to the 0805 (2012 Metric) package specification.

Q: Is Z0805C330BPWST still available for purchase?

A: Z0805C330BPWST is listed with Obsolete product status, indicating it is no longer in active production. While inventory may exist in distribution channels, this part is not recommended for new designs or applications requiring long-term supply chain availability.

Q: What is the significance of the operating temperature range difference in 742792012?

A: The 742792012 operates from -55°C to 125°C, compared to -40°C to 125°C for the LSMCA201208T330RG. This extended lower temperature specification provides additional margin for applications operating in cold environments. The upper temperature limit remains identical at 125°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (FBMJ2125HM330-T, 742792012, and Z0805C330BPWST) are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH unaffected status, matching the compliance profile of the primary part LSMCA201208T330RG.

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

A: The LSMCA201208T330RG is supplied in Tape & Reel (TR) format. Substitute parts are available in Cut Tape (CT) and Digi-Reel® formats. Packaging format does not affect component performance; selection depends on assembly process requirements and quantity needs.

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