SCRH74B-180 Equivalent & Substitute Parts

Part Overview

The SCRH74B-180 is a 18 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.31 A continuous current with a maximum DC resistance of 110mOhm. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Substiute Parts

SCRH74B-180

Signal TransformerIn Stock: 746SCRH74B-180 Datasheet

Current PartRFQ

SRR0745A-180M

Bourns Inc.In Stock: 6650SRR0745A-180M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR0745A-180M from Bourns Inc. qualifies as a substitute for the SCRH74B-180 based on the following critical parameters:

• Inductance value matches at 18 µH with identical ±20% tolerance
• Current rating of 1.8 A exceeds the minimum requirement of 1.31 A
• DC resistance of 90mOhm is lower than the 110mOhm maximum specification, providing improved performance
• Saturation current of 1.95 A exceeds the 1.31 A requirement
• Shielded construction matches the original specification
• Operating temperature range of -40°C to 125°C is identical
• Surface mount packaging and nonstandard case format are compatible
• ROHS3 compliance maintained

Parameter Comparison

Engineering Selection Recommendations

The SRR0745A-180M is qualified as a direct substitute for the SCRH74B-180 based on electrical and mechanical parameter equivalence. The substitute part demonstrates superior electrical characteristics with higher current ratings and lower DC resistance, while maintaining identical inductance values and operating temperature specifications. Both components are ROHS3 compliant and carry Active product status. The SRR0745A-180M includes AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring this standard.

Frequently Asked Questions (FAQ)

Q: Can the SRR0745A-180M replace the SCRH74B-180 in existing designs?

A: Yes. Both components share identical inductance values (18 µH), tolerance specifications (±20%), shielding characteristics, operating temperature ranges (-40°C to 125°C), and surface mount nonstandard packaging. The substitute part meets or exceeds all electrical requirements of the original component.

Q: What are the physical dimension differences between these parts?

A: The SCRH74B-180 measures 0.307" L x 0.307" W x 0.177" H (7.80mm x 7.80mm x 4.50mm). The SRR0745A-180M measures 0.287" L x 0.287" W x 0.185" H (7.30mm x 7.30mm x 4.70mm). Slight dimensional variations exist; verify PCB layout compatibility before implementation.

Q: How do the DC resistance specifications compare?

A: The SCRH74B-180 specifies a maximum DC resistance of 110mOhm, while the SRR0745A-180M specifies 90mOhm maximum. The substitute part provides lower resistance, resulting in reduced power dissipation and improved efficiency in the application circuit.

Q: Are both components RoHS compliant?

A: Yes. Both the SCRH74B-180 and SRR0745A-180M are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for electronic component manufacturing and use.

Q: What is the difference in current handling capability?

A: The SCRH74B-180 is rated for 1.31 A continuous current with 1.31 A saturation current. The SRR0745A-180M is rated for 1.8 A continuous current with 1.95 A saturation current. The substitute part provides higher current capacity for the same inductance value.