SRP2012TMA-2R2M Equivalent & Substitute Parts

Part Overview

The SRP2012TMA-2R2M is a 2.2 µH shielded metal powder core inductor manufactured by Bourns Inc., rated for 2.5 A continuous current with a maximum DC resistance of 126 mOhm. This surface mount component is packaged in the 0806 (2016 Metric) form factor and is designed for applications requiring compact, high-current inductive filtering and energy storage in power conversion circuits. The part maintains Active product status and carries AEC-Q200 automotive qualification. Substitute components are identified when equivalent electrical performance cannot be sourced from the primary manufacturer due to inventory constraints, lead time requirements, or design flexibility needs while maintaining functional compatibility within specified electrical and thermal parameters.

Key Parameters

Parameter	Value	Unit	Criticality
Inductance	2.2	µH	Critical
Inductance Tolerance	±20%	%	Critical
Current Rating	2.5	A	Critical
DC Resistance (DCR)	126	mOhm Max	Critical
Package / Case	0806 (2016 Metric)	-	Critical
Shielding	Shielded	-	Critical
Operating Temperature Range	-55°C ~ 150°C	°C	Important
RoHS Status	ROHS3 Compliant	-	Important
AEC-Q200 Rating	Yes	-	Important
Mounting Type	Surface Mount	-	Critical

Substitute Part Grouping Explanation

Substitute components for the SRP2012TMA-2R2M are qualified based on the following electrical and mechanical parameters:

Matching Parameters (Required for Substitution):

Inductance value: 2.2 µH
Inductance tolerance: ±20%
Package / Case: 0806 (2016 Metric)
Physical dimensions: 0.079" L x 0.063" W (2.00mm x 1.60mm), Height 0.047" (1.20mm) maximum
Shielding: Shielded construction
Mounting type: Surface Mount
RoHS3 compliance
AEC-Q200 qualification
Moisture Sensitivity Level: 1 (Unlimited)

Parameters Allowing Variation:

Current rating (substitute parts rated at 1.2 A and 1.4 A are acceptable for applications not requiring the full 2.5 A rating)
DC resistance (substitute parts with higher DCR values are acceptable for applications with relaxed loss requirements)
Operating temperature range (substitute parts with -40°C minimum are acceptable for applications not requiring -55°C operation)
Core material type (metal powder versus drum core wirewound both provide shielded inductive performance)

The identified substitute parts maintain electrical equivalence at the 2.2 µH inductance specification and are mechanically compatible with the original package footprint and mounting requirements.

Parameter Comparison

Parameter	SRP2012TMA-2R2M (Bourns)	DFE2MCAH2R2MJ0L (Murata)	DFE201612PD-2R2M=P2 (Murata)
Manufacturer	Bourns Inc.	Murata Electronics	Murata Electronics
Inductance	2.2 µH	2.2 µH	2.2 µH
Inductance Tolerance	±20%	±20%	±20%
Current Rating	2.5 A	1.4 A	1.2 A
Current - Saturation (Isat)	2.7 A	1.7 A	1.7 A
DC Resistance (DCR)	126 mOhm Max	169 mOhm Max	172 mOhm Max
Package / Case	0806 (2016 Metric)	0806 (2016 Metric)	0806 (2016 Metric)
Size / Dimension	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)	0.079" L x 0.063" W (2.00mm x 1.60mm)
Height - Seated (Max)	0.047" (1.20mm)	0.047" (1.20mm)	0.047" (1.20mm)
Shielding	Shielded	Shielded	Shielded
Operating Temperature	-55°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q200 Rating	Yes	Yes	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

Primary Selection: SRP2012TMA-2R2M

The SRP2012TMA-2R2M remains the preferred component for applications requiring the full 2.5 A current rating and lowest DC resistance (126 mOhm maximum). This part provides the widest operating temperature range (-55°C to 150°C) and is suitable for automotive and industrial environments with extended cold-start requirements. All three components carry identical AEC-Q200 qualification and ROHS3 compliance status.

Secondary Selection: DFE2MCAH2R2MJ0L (Murata)

The DFE2MCAH2R2MJ0L is suitable for applications with current requirements up to 1.4 A. This substitute maintains the full -55°C to 150°C operating temperature range of the primary part, making it compatible with automotive thermal specifications. The higher DC resistance (169 mOhm maximum) results in increased power dissipation and should be evaluated for thermal impact in the application circuit.

Tertiary Selection: DFE201612PD-2R2M=P2 (Murata)

The DFE201612PD-2R2M=P2 is suitable for applications with current requirements up to 1.2 A and operating temperatures down to -40°C. The reduced operating temperature minimum and highest DC resistance (172 mOhm maximum) limit this component to applications with relaxed thermal and low-temperature performance requirements. This part is appropriate for commercial-grade applications not requiring automotive-level temperature performance.

All three components are Active products with current inventory availability and are suitable for direct PCB footprint compatibility in 0806 (2016 Metric) surface mount designs.

Frequently Asked Questions (FAQ)

Q: Can the DFE2MCAH2R2MJ0L or DFE201612PD-2R2M=P2 be used as direct replacements for the SRP2012TMA-2R2M?

A: Direct substitution is possible only when the application current requirement does not exceed the substitute part's rating. The DFE2MCAH2R2MJ0L is rated for 1.4 A maximum and the DFE201612PD-2R2M=P2 is rated for 1.2 A maximum, compared to the SRP2012TMA-2R2M's 2.5 A rating. Applications drawing more than 1.4 A require the primary part. Both substitute parts maintain the same 0806 (2016 Metric) footprint and height, allowing PCB-level compatibility without layout modification.

Q: What is the impact of higher DC resistance in the substitute parts?

A: The substitute parts exhibit higher DC resistance values (169 mOhm and 172 mOhm maximum) compared to the primary part (126 mOhm maximum). This results in increased resistive power loss according to P = I²R. For a 1 A load, the DFE2MCAH2R2MJ0L dissipates approximately 169 mW compared to 126 mW for the SRP2012TMA-2R2M. Thermal analysis of the application circuit is required to confirm acceptable temperature rise at the substitute component location.

Q: Are there temperature range limitations with the substitute parts?

A: The DFE2MCAH2R2MJ0L maintains the same -55°C to 150°C operating range as the primary part and is suitable for automotive applications. The DFE201612PD-2R2M=P2 has a minimum operating temperature of -40°C, which is acceptable for commercial and industrial applications but not suitable for automotive cold-start environments requiring -55°C operation.

Q: Do all three parts carry the same compliance certifications?

A: Yes. All three components are ROHS3 compliant, carry AEC-Q200 automotive qualification, have Moisture Sensitivity Level 1 (Unlimited), and are classified as REACH Unaffected. Compliance documentation is equivalent across all three parts.

Q: What is the difference between the core materials used in these inductors?

A: The SRP2012TMA-2R2M uses a metal powder core construction with flat wire, while both Murata substitute parts use drum core wirewound construction. Both core types provide shielded inductive performance suitable for the same applications. The different construction methods result in the varying DC resistance and current rating characteristics noted in the parameter comparison table.

Q: Can these parts be used interchangeably in the same circuit without design changes?

A: Mechanical and electrical interchangeability is confirmed for the 0806 (2016 Metric) package footprint. However, circuit-level compatibility depends on the application's current and thermal requirements. Applications designed for the full 2.5 A rating of the SRP2012TMA-2R2M cannot use the lower-rated substitute parts without circuit redesign or current limiting. Thermal analysis is required when substituting parts with higher DC resistance values.

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