SCRH104-3R3 Equivalent & Substitute Parts

Part Overview

The SCRH104-3R3 is a 3.3 µH shielded inductor manufactured by Signal Transformer, rated for 4.68 A continuous current with a maximum DC resistance of 29mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant.

Substiute Parts

SCRH104-3R3

Signal TransformerIn Stock: 880SCRH104-3R3 Datasheet

Current PartRFQ

7447713033

Würth ElektronikIn Stock: 11547447713033 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH104-3R3 is determined by strict equivalence across the following electrical and mechanical parameters:

Inductance value must match at 3.3 µH with ±30% tolerance. Current rating must support minimum 4.68 A continuous operation. DC resistance must not exceed 29 mOhm to maintain thermal and efficiency characteristics. Saturation current must be at least 7 A. Shielding configuration must remain shielded to preserve electromagnetic isolation. Operating temperature range must encompass -40°C to 125°C. Mounting type must be surface mount. Physical dimensions and height must be compatible with the original nonstandard package footprint. RoHS3 compliance and MSL 1 rating are mandatory for regulatory and environmental requirements.

The substitute part 7447713033 (Würth Elektronik WE-PD Performance series) meets all these criteria and is classified as active product status, providing long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 7447713033 is the qualified substitute for the obsolete SCRH104-3R3. This recommendation is based on:

Active product status ensures long-term availability and supply chain continuity, eliminating the procurement risk associated with the obsolete Signal Transformer part. Both components maintain ROHS3 compliance and MSL 1 rating, satisfying regulatory and environmental requirements without modification. The substitute part demonstrates equivalent or superior electrical performance: DC resistance is 5 mOhm lower (24 mOhm vs. 29 mOhm), saturation current is 0.2 A higher (7.2 A vs. 7 A), and current rating is within 0.08 A of the original specification. The substitute's lower profile (3.00 mm vs. 5.00 mm seated height) provides additional design flexibility for space-constrained applications. AEC-Q200 qualification of the substitute part provides automotive-grade reliability assurance.

Frequently Asked Questions (FAQ)

Q: Can the 7447713033 be used as a direct replacement for the SCRH104-3R3?

A: Yes. Both parts meet the same electrical specifications for inductance (3.3 µH ±30%), current rating (4.6 A minimum vs. 4.68 A required), saturation current (7.2 A vs. 7 A minimum), and DC resistance (24 mOhm vs. 29 mOhm maximum). Operating temperature ranges and shielding configurations are identical. Physical dimensions are compatible within nonstandard package tolerances.

Q: What are the key differences between these parts?

A: The primary differences are product status and physical profile. The SCRH104-3R3 is obsolete; the 7447713033 is active. The substitute has a lower seated height (3.00 mm vs. 5.00 mm) and slightly lower DC resistance (24 mOhm vs. 29 mOhm). The substitute includes AEC-Q200 qualification, which the original part does not specify.

Q: Are there any thermal or performance trade-offs with substitution?

A: No. The substitute's lower DC resistance (24 mOhm vs. 29 mOhm) results in reduced resistive losses and improved thermal performance. Saturation current is higher (7.2 A vs. 7 A), providing additional margin. All other electrical parameters are equivalent or superior.

Q: Does the lower profile of the substitute affect compatibility?

A: The lower seated height (3.00 mm vs. 5.00 mm) is compatible with the original design. This reduction provides additional clearance in space-constrained layouts and does not compromise electrical performance or mechanical stability.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the SCRH104-3R3 and 7447713033 are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (unlimited) for both parts, requiring no special handling or storage conditions.