SCRH127/LD-471 Equivalent & Substitute Parts

Part Overview

The SCRH127/LD-471 is a 470 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 930 mA continuous current with a maximum DC resistance of 741 mOhm. This component is designed for applications requiring fixed inductance in compact form factors with electromagnetic shielding. The part is currently active in production. Substitute parts become necessary when the original manufacturer discontinues supply, when alternative sourcing improves lead times or cost efficiency, or when design requirements allow for compatible alternatives meeting the same electrical and mechanical specifications.

Substiute Parts

SCRH127/LD-471

Signal TransformerIn Stock: 799SCRH127/LD-471 Datasheet

Current PartRFQ

SLF12575T-471MR80-H

TDK CorporationIn Stock: 2231SLF12575T-471MR80-H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH127/LD-471 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Inductance value: 470 µH with ±20% tolerance
• Current rating: minimum 930 mA continuous
• DC resistance: maximum 741 mOhm
• Shielding: must be shielded construction
• Inductance test frequency: 1 kHz

Mechanical Compatibility Requirements:

• Mounting type: Surface Mount only
• Package footprint: 12.50mm x 12.50mm
• Height: must not exceed 8.00mm seated height
• Operating temperature range: -40°C to 125°C minimum

Compliance Requirements:

• RoHS3 compliance mandatory
• Moisture Sensitivity Level 1 acceptable

The substitute part SLF12575T-471MR80-H meets all electrical and mechanical compatibility criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The SLF12575T-471MR80-H qualifies as a functional substitute based on matching inductance, tolerance, shielding, package footprint, and thermal operating range. Both parts maintain ROHS3 compliance and MSL Level 1 rating.

The substitute part exhibits a lower continuous current rating (800 mA versus 930 mA) and lower saturation current (800 mA versus 1 A). These differences require circuit-level evaluation to confirm suitability for the intended application. The substitute part carries AEC-Q200 automotive qualification, whereas the main part does not specify this rating. The substitute part is designated "Not For New Designs" by the manufacturer, indicating it may have limited future availability.

Selection between these parts depends on application current requirements and design lifecycle considerations. Both parts satisfy the core electrical and mechanical substitution criteria within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can SLF12575T-471MR80-H replace SCRH127/LD-471 in all applications?

A: Substitution is valid only when circuit current requirements do not exceed 800 mA continuous and 800 mA saturation current. The main part supports 930 mA continuous and 1 A saturation current. Applications operating above 800 mA require the original part or alternative sources.

Q: Are the package dimensions identical?

A: Both parts share the same footprint of 12.50mm x 12.50mm. The substitute part has a slightly lower seated height of 7.85mm compared to 8.00mm maximum for the main part, making it compatible with the same PCB layout and assembly process.

Q: What does "Not For New Designs" mean for the substitute part?

A: This designation indicates the manufacturer recommends against using this part in new product designs. It may have limited production runs and uncertain long-term availability. For new designs, the main part SCRH127/LD-471 or other active-status alternatives are preferred.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant and carry MSL Level 1 rating. The substitute part includes AEC-Q200 automotive qualification, which the main part does not specify. Both are suitable for industrial temperature range applications from -40°C to 125°C.

Q: What is the significance of DC resistance differences?

A: The substitute part has 720 mOhm maximum DCR compared to 741 mOhm for the main part. This 21 mOhm difference is within typical manufacturing tolerance and does not create substitution barriers for most applications. Both values fall within acceptable ranges for 470 µH inductors in this package class.