SCPH73B-220 Equivalent & Substitute Parts

Part Overview

The SCPH73B-220 is a 22 µH shielded inductor manufactured by Signal Transformer, rated for 1.38 A continuous current with a maximum DC resistance of 170mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 871 pieces available in inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters align within the specified tolerances and ratings for this inductance value and current class, ensuring functional interchangeability in circuit applications.

Substiute Parts

SCPH73B-220

Signal TransformerIn Stock: 950SCPH73B-220 Datasheet

Current PartRFQ

SRR0735A-220M

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR0735A-220M qualifies as a substitute for the SCPH73B-220 based on the following alignment of critical parameters:

• Inductance Match: Both parts specify 22 µH at 1 kHz test frequency with ±20% tolerance
• Current Rating Compatibility: The substitute's 1.2 A rating operates within the application envelope of the main part's 1.38 A rating
• DC Resistance: The substitute's 160mOhm maximum DCR is lower than the main part's 170mOhm maximum, providing equivalent or improved performance
• Shielding Configuration: Both parts are shielded inductors, maintaining electromagnetic isolation requirements
• Temperature Range: Identical operating range of -40°C to 125°C
• Surface Mount Compatibility: Both use surface mount technology with nonstandard package dimensions
• Compliance Status: Both are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity

Parameter Comparison

Engineering Selection Recommendations

Both the SCPH73B-220 and SRR0735A-220M maintain active product status with full ROHS3 compliance and REACH unaffected designation. The SRR0735A-220M carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components. The substitute part's lower DC resistance and higher saturation current provide operational margin within the specified inductance and current class. Physical dimensions are comparable with the substitute slightly more compact, suitable for space-constrained layouts. Selection between these parts should be based on availability, supply chain requirements, and any application-specific qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRR0735A-220M directly replace the SCPH73B-220 in existing designs?

A: Yes, the SRR0735A-220M qualifies as a functional substitute. Both parts share identical inductance values, tolerance specifications, operating temperature ranges, and shielding configurations. The substitute's lower current rating (1.2 A vs. 1.38 A) requires verification that circuit operating current does not exceed 1.2 A continuous. Physical dimensions are comparable, with the substitute being slightly smaller.

Q: What are the key differences between these two inductors?

A: The primary differences are manufacturer origin, current rating, and DC resistance. The SCPH73B-220 offers higher continuous current capacity (1.38 A), while the SRR0735A-220M provides lower DC resistance (160mOhm vs. 170mOhm) and carries AEC-Q200 automotive qualification. Both maintain identical inductance, tolerance, temperature range, and compliance status.

Q: Are there any package compatibility concerns?

A: Both parts use nonstandard surface mount packages with comparable dimensions. The SRR0735A-220M is slightly smaller (7.30mm x 7.30mm vs. 7.50mm x 7.50mm) and lower profile (3.70mm vs. 3.80mm). These dimensional differences are minor and should not present PCB layout issues in most applications.

Q: What compliance certifications apply to both parts?

A: Both the SCPH73B-220 and SRR0735A-220M are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. The SRR0735A-220M additionally holds AEC-Q200 automotive qualification.

Q: How do the saturation current specifications compare?

A: The SCPH73B-220 specifies 1 A saturation current, while the SRR0735A-220M specifies 1.28 A. The substitute provides higher saturation margin, which may benefit applications with transient current conditions.