SCRH8D28-4R7 Equivalent & Substitute Parts

Part Overview

The SCRH8D28-4R7 is a 4.7 µH shielded inductor manufactured by Signal Transformer, rated for 3.4 A continuous current with a maximum DC resistance of 24.7mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is specified at 100 kHz inductance frequency. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring compact, shielded inductive filtering or energy storage in power conversion circuits. Equivalent parts are identified when alternative manufacturers offer inductors meeting the same electrical specifications and mechanical compatibility requirements.

Substiute Parts

SCRH8D28-4R7

Signal TransformerIn Stock: 1056SCRH8D28-4R7 Datasheet

Current PartRFQ

SD8350-4R7-R

Eaton - Electronics DivisionIn Stock: 1631SD8350-4R7-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH8D28-4R7 is determined by the following critical parameters:

Electrical Compatibility: Inductance value (4.7 µH ±30%), current rating (minimum 3.4 A), and DC resistance (24.7mOhm maximum) must be maintained or improved. The substitute must not exceed the specified DC resistance to prevent thermal performance degradation.

Mechanical Compatibility: Surface mount package with footprint dimensions of 8.30mm x 8.30mm. Height variation is acceptable provided the seated height does not exceed typical PCB assembly clearances.

Environmental & Compliance: Operating temperature range -40°C to 125°C, RoHS compliance status, and MSL rating of 1 (Unlimited) moisture sensitivity.

Shielding Requirement: The substitute must maintain shielded construction to preserve electromagnetic isolation properties.

The SD8350-4R7-R from Eaton - Electronics Division meets all substitution criteria with equivalent electrical performance and improved current saturation rating.

Parameter Comparison

Engineering Selection Recommendations

The SD8350-4R7-R is a direct functional equivalent to the SCRH8D28-4R7. Both parts are Active status products with full RoHS compliance and unlimited moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.

The SD8350-4R7-R offers improved electrical performance with higher current rating (4.1 A vs. 3.4 A) and superior saturation current (5.5 A vs. 3.4 A), while maintaining lower DC resistance (22mOhm vs. 24.7mOhm). These characteristics provide enhanced thermal efficiency and current handling capacity.

Mechanical differences exist in footprint dimensions: the SD8350-4R7-R is 1.20mm longer (9.50mm vs. 8.30mm) and 1.30mm taller (4.50mm vs. 3.20mm). PCB layout verification is required to confirm clearance compatibility with the substitute part's larger profile.

Frequently Asked Questions (FAQ)

Q: Can the SD8350-4R7-R replace the SCRH8D28-4R7 in all applications?

A: Electrical substitution is valid for applications requiring 4.7 µH inductance at 3.4 A or lower current levels. Mechanical verification is mandatory due to increased footprint dimensions (9.50mm x 8.30mm vs. 8.30mm x 8.30mm) and seated height (4.50mm vs. 3.20mm). PCB layout and assembly clearances must be confirmed before implementation.

Q: What are the key differences in electrical performance?

A: The SD8350-4R7-R provides superior current handling with 4.1 A continuous rating and 5.5 A saturation current compared to 3.4 A for both parameters on the SCRH8D28-4R7. DC resistance is lower on the substitute (22mOhm vs. 24.7mOhm), resulting in reduced power dissipation and improved thermal performance.

Q: Are both parts RoHS compliant?

A: Yes. The SCRH8D28-4R7 is ROHS3 compliant, and the SD8350-4R7-R is RoHS compliant. Both meet environmental and regulatory requirements for modern electronics manufacturing.

Q: What is the impact of the height difference on PCB assembly?

A: The SD8350-4R7-R has a maximum seated height of 4.50mm compared to 3.20mm for the SCRH8D28-4R7. This 1.30mm increase may affect PCB stackup, component clearance to adjacent parts, and conformal coating processes. Layout review is required.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the SCRH8D28-4R7 and SD8350-4R7-R carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processes.