SCRH74-150 Equivalent & Substitute Parts

Part Overview

The SCRH74-150 is a 15 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.47 A continuous current with a maximum DC resistance of 81 mOhm. This component is designed for applications requiring fixed inductance in compact nonstandard packages with operating temperatures from -40°C to 125°C. The part is currently active and in production. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

SCRH74-150

Signal TransformerIn Stock: 917SCRH74-150 Datasheet

Current PartRFQ

SRR0745A-150M

Bourns Inc.In Stock: 7914SRR0745A-150M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR0745A-150M from Bourns Inc. qualifies as a substitute for the SCRH74-150 based on the following critical parameters:

• Inductance Match: Both parts specify 15 µH with ±20% tolerance at 1 kHz test frequency
• Shielding: Both are shielded inductors, maintaining electromagnetic isolation requirements
• Operating Temperature Range: Both support -40°C to 125°C operation
• Mounting and Packaging: Both are surface mount components in nonstandard packages
• RoHS and Environmental Compliance: Both are ROHS3 compliant with MSL 1 rating

The substitute part demonstrates improved electrical performance with higher current rating (1.9 A vs 1.47 A) and lower DC resistance (75 mOhm vs 81 mOhm), making it suitable for applications where the original part is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the SCRH74-150 and SRR0745A-150M meet identical inductance, tolerance, temperature, and compliance requirements. The SRR0745A-150M carries AEC-Q200 qualification, indicating automotive-grade reliability testing. Selection between these parts depends on availability, cost, and specific application requirements. The SRR0745A-150M offers superior current handling capacity and lower DC resistance, providing design margin in current-limited applications. Physical dimensions differ slightly; verify PCB layout compatibility before substitution.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-150M directly replace the SCRH74-150 in existing designs?

A: Yes, provided PCB layout accommodates the dimensional differences. The SRR0745A-150M is 0.02" smaller in length and width but 0.008" taller. Verify footprint clearance before implementation.

Q: What electrical parameters must match for substitution?

A: Inductance value (15 µH), tolerance (±20%), shielding type, and operating temperature range (-40°C to 125°C) must be identical. The substitute part must support the circuit's required current without saturation.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant with MSL 1 rating. The SRR0745A-150M includes AEC-Q200 qualification, which the SCRH74-150 does not specify.

Q: How do the current ratings affect substitution?

A: The SRR0745A-150M supports 1.9 A continuous current versus 1.47 A for the SCRH74-150. This allows the substitute to handle higher current applications without saturation, providing additional design flexibility.

Q: What is the impact of DC resistance differences?

A: The SRR0745A-150M has 75 mOhm maximum DCR compared to 81 mOhm for the SCRH74-150. Lower resistance reduces power dissipation and heat generation in the inductor.