SCPH73-220 Equivalent & Substitute Parts

Part Overview

The SCPH73-220 is a 22 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 1.38 A continuous current with a maximum DC resistance of 170mOhm and operates across the industrial temperature range of -40°C to 125°C. The part maintains 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 category.

Substiute Parts

SCPH73-220

Signal TransformerIn Stock: 1085SCPH73-220 Datasheet

Current PartRFQ

SRR0735A-220M

Bourns Inc.In Stock: 7173SRR0735A-220M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCPH73-220 is determined by the following critical parameters:

Inductance value must match at 22 µH within the specified ±20% tolerance band. Current rating of the substitute must meet or exceed the 1.38 A requirement to ensure safe operation under load conditions. DC resistance must not exceed 170mOhm to maintain equivalent power dissipation characteristics. Shielding configuration must remain shielded to preserve electromagnetic isolation properties. Operating temperature range must encompass or match the -40°C to 125°C specification. Surface mount packaging and nonstandard form factor must be compatible with the original application footprint. RoHS3 compliance and MSL rating of 1 (Unlimited) must be maintained.

The SRR0735A-220M from Bourns Inc. qualifies as a substitute based on matching inductance (22 µH), compatible current rating (1.2 A), superior DC resistance specification (160mOhm Max), maintained shielding, identical operating temperature range, surface mount configuration, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SCPH73-220 and SRR0735A-220M maintain Active product status and full ROHS3 compliance. The SRR0735A-220M offers improved DC resistance performance at 160mOhm maximum compared to the 170mOhm specification of the SCPH73-220, resulting in lower power dissipation. The SRR0735A-220M includes AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring this standard. Physical dimensions differ slightly (7.30mm vs 7.50mm length/width; 3.70mm vs 3.60mm height), requiring footprint verification before substitution. Current rating of the SRR0735A-220M at 1.2 A is lower than the SCPH73-220 at 1.38 A; applications operating above 1.2 A continuous current must retain the original part. Both components share identical inductance tolerance, temperature range, and moisture sensitivity specifications.

Frequently Asked Questions (FAQ)

Q: Can the SRR0735A-220M replace the SCPH73-220 in all applications?

A: Substitution is valid only when application current requirements do not exceed 1.2 A continuous operation. The SRR0735A-220M saturation current of 1.28 A must also be considered for transient conditions. Physical footprint differences (7.30mm vs 7.50mm body dimensions) require PCB layout verification.

Q: What is the significance of the DC resistance difference between these parts?

A: The SRR0735A-220M exhibits 160mOhm maximum DC resistance versus 170mOhm for the SCPH73-220. This 10mOhm reduction decreases resistive losses and heat generation, providing a performance advantage in power-sensitive applications.

Q: Are both parts suitable for automotive applications?

A: The SRR0735A-220M carries AEC-Q200 qualification, meeting automotive reliability standards. The SCPH73-220 does not list this certification. Application requirements determine whether automotive qualification is mandatory.

Q: How do the physical dimensions affect substitution?

A: The SCPH73-220 measures 7.50mm × 7.50mm × 3.60mm (L × W × H), while the SRR0735A-220M measures 7.30mm × 7.30mm × 3.70mm. These differences require PCB footprint and clearance verification to ensure mechanical compatibility within the assembly.

Q: Do both parts meet the same compliance standards?

A: Both components are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (Unlimited). Both are classified under ECCN EAR99 for export purposes.