SCPH73B-101 Equivalent & Substitute Parts

Part Overview

The SCPH73B-101 is a 100 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring moderate current handling and low DC resistance. This component is classified as Active product status with full RoHS3 compliance. 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

SCPH73B-101

Signal TransformerIn Stock: 771SCPH73B-101 Datasheet

Current PartRFQ

SRR0735A-101M

Bourns Inc.In Stock: 5678SRR0735A-101M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCPH73B-101 is determined by the following criteria:

Inductance value must be 100 µH with ±20% tolerance to maintain circuit performance within design specifications. Current rating must support minimum 540 mA operation to ensure the substitute can handle the application load. DC resistance must not exceed 700 mOhm to preserve power efficiency characteristics. Shielding must be present to maintain electromagnetic compatibility in the target application. Operating temperature range must encompass -40°C to 125°C. Surface mount packaging and nonstandard case dimensions must be compatible with the PCB layout. RoHS3 compliance is required for regulatory alignment.

The SRR0735A-101M from Bourns Inc. meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The SRR0735A-101M qualifies as a direct substitute for the SCPH73B-101 based on matching inductance, tolerance, shielding, temperature range, and compliance certifications. Both components are Active product status with ROHS3 compliance and AEC-Q200 rating for the substitute, indicating automotive-grade reliability. The substitute exhibits lower DC resistance (630 mOhm vs. 700 mOhm), which reduces power dissipation. The current rating differential (540 mA vs. 680 mA) requires verification that the application does not demand sustained operation above 540 mA. Physical dimensions are compatible with existing PCB layouts, with the substitute occupying slightly less board space.

Frequently Asked Questions (FAQ)

Q: Can the SRR0735A-101M replace the SCPH73B-101 in all applications?

A: Substitution is valid when the application current requirement does not exceed 540 mA continuous operation. The inductance value, tolerance, shielding, and temperature range are equivalent. Verify the specific circuit current profile before implementation.

Q: What is the impact of the 70 mOhm DCR difference?

A: The SRR0735A-101M has lower DC resistance (630 mOhm vs. 700 mOhm), resulting in reduced power loss and heat generation. This is a favorable characteristic for thermal performance.

Q: Are the physical dimensions compatible with existing PCB designs?

A: Yes. The substitute dimensions (7.30mm x 7.30mm x 3.70mm) are smaller than the original (7.50mm x 7.50mm x 3.80mm) and fit within the same footprint allocation. No PCB layout modifications are required.

Q: Do both parts meet the same compliance standards?

A: Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The substitute carries AEC-Q200 automotive qualification, providing additional reliability assurance.

Q: What is the saturation current difference, and does it matter?

A: The SRR0735A-101M has higher saturation current (600 mA vs. 460 mA), indicating greater core stability under peak transient conditions. This is a favorable characteristic for circuit robustness.