SCRH127B-471 Equivalent & Substitute Parts

Part Overview

The SCRH127B-471 is a 470 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 920 mA continuous current with a maximum DC resistance of 980 mOhm. This component is classified as 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 value and package class.

Substiute Parts

SCRH127B-471

Signal TransformerIn Stock: 798SCRH127B-471 Datasheet

Current PartRFQ

DRA125-471-R

Eaton - Electronics DivisionIn Stock: 1309DRA125-471-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH127B-471 is determined by the following criteria:

• Inductance Value: Must be 470 µH with ±20% tolerance
• Current Rating: Must support minimum 920 mA continuous current
• DC Resistance: Must not exceed 980 mOhm maximum
• Saturation Current: Must meet or exceed 790 mA
• Package Compatibility: Must be surface mount with 12.50 × 12.50 mm footprint
• Shielding: Must be shielded construction
• Compliance: Must maintain ROHS3 compliance and Moisture Sensitivity Level 1

The DRA125-471-R from Eaton - Electronics Division meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The DRA125-471-R qualifies as a direct substitute for the SCRH127B-471 based on matching inductance, tolerance, package footprint, shielding, and compliance requirements. Both parts maintain ROHS3 compliance and MSL Level 1 rating. The DRA125-471-R offers improved DC resistance (790 mOhm vs. 980 mOhm) and higher saturation current (1.006 A vs. 790 mA), providing performance advantages in thermal and saturation margin characteristics. The substitute part carries AEC-Q200 automotive qualification, extending its applicability to automotive-grade applications. The operating temperature range of the DRA125-471-R extends to 165°C compared to 125°C for the original part, providing additional thermal headroom in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the DRA125-471-R be used as a direct replacement for SCRH127B-471 in existing designs?

A: The DRA125-471-R is mechanically and electrically compatible for substitution. Both parts share identical inductance values, tolerances, package dimensions (12.50 × 12.50 mm), and shielding characteristics. Footprint compatibility is confirmed for surface mount assembly.

Q: What is the significance of the lower current rating in the DRA125-471-R?

A: The DRA125-471-R has a continuous current rating of 826 mA compared to 920 mA for the SCRH127B-471. Circuit designs operating at or above 826 mA must be evaluated to ensure the substitute part remains within acceptable thermal and saturation margins for the intended application.

Q: How does DC resistance affect component selection?

A: The DRA125-471-R exhibits lower DC resistance (790 mOhm) than the SCRH127B-471 (980 mOhm maximum). Lower DC resistance reduces resistive losses and heat generation, improving efficiency in current-carrying applications.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant with MSL Level 1 rating. The DRA125-471-R additionally carries AEC-Q200 automotive qualification, making it suitable for automotive applications where the original part may not be specified.

Q: What is the impact of the extended operating temperature range?

A: The DRA125-471-R operates from -40°C to 165°C, compared to -40°C to 125°C for the SCRH127B-471. This extended range provides additional thermal margin in high-temperature environments and may eliminate the need for thermal derating in certain applications.