SCRH127-471 Equivalent & Substitute Parts

Part Overview

The SCRH127-471 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 designed for applications requiring fixed inductance in compact form factors with electromagnetic shielding. The part maintains Active product status and is RoHS3 compliant, suitable for industrial and commercial electronic assemblies operating across the -40°C to 125°C temperature range. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified parameter tolerances.

Substiute Parts

SCRH127-471

Signal TransformerIn Stock: 977SCRH127-471 Datasheet

Current PartRFQ

SPD127R-474M

API Delevan Inc.In Stock: 1640SPD127R-474M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Inductance value must match at 470 µH within the specified ±20% tolerance band. DC resistance must not exceed 980 mOhm maximum to maintain circuit performance and thermal characteristics. Current rating must support the application's continuous current requirements; parts with lower current ratings represent potential substitutes only when circuit design permits reduced current capacity. Shielding must be present to maintain electromagnetic isolation equivalent to the original design. Operating temperature range must encompass or exceed the -40°C to 125°C specification. Surface mount packaging and nonstandard case dimensions must be compatible with existing PCB layouts. RoHS3 compliance and regulatory certifications (REACH, EAR99) must be maintained.

The SPD127R-474M qualifies as a substitute based on matching inductance (470 µH), identical DC resistance maximum (980 mOhm), shielded construction, surface mount configuration, and equivalent regulatory compliance. Differences in current rating and saturation current are noted for engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

Both the SCRH127-471 and SPD127R-474M maintain Active product status and satisfy RoHS3, REACH, and EAR99 regulatory requirements. The SPD127R-474M offers an extended lower operating temperature limit (-55°C versus -40°C), providing broader thermal coverage for applications requiring cold environment operation.

The primary distinction is current rating capacity. The SCRH127-471 supports 920 mA continuous current, while the SPD127R-474M is rated for 800 mA. Selection between these parts depends on circuit current requirements. Applications operating at or below 800 mA continuous current can utilize the SPD127R-474M without derating. Applications requiring current capacity between 800 mA and 920 mA must use the SCRH127-471.

Physical dimensions differ slightly: the SPD127R-474M footprint is 12.00mm x 12.00mm compared to 12.50mm x 12.50mm for the SCRH127-471. Both maintain identical 8.00mm seated height. PCB layout compatibility must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can the SPD127R-474M replace the SCRH127-471 in all applications?

A: Substitution is valid only when circuit current requirements do not exceed 800 mA continuous. Applications designed for the full 920 mA rating of the SCRH127-471 require the original part or an equivalent with matching current capacity.

Q: What is the impact of the 120 mA current rating difference?

A: The SPD127R-474M's 800 mA rating represents a 13% reduction from the SCRH127-471's 920 mA specification. This difference is significant only in circuits operating near maximum current capacity. Circuits with design margin below 800 mA are unaffected.

Q: Are the physical dimensions compatible on existing PCBs?

A: The SPD127R-474M footprint (12.00mm x 12.00mm) is slightly smaller than the SCRH127-471 (12.50mm x 12.50mm). Both parts fit within the same mounting area, but PCB pad layout must accommodate the smaller component body. Height specifications are identical at 8.00mm maximum.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCRH127-471 and SPD127R-474M are RoHS3 compliant, REACH unaffected, and classified as EAR99. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both parts.

Q: What is the significance of the extended temperature range on the SPD127R-474M?

A: The SPD127R-474M operates from -55°C to 125°C, compared to -40°C to 125°C for the SCRH127-471. The additional -15°C lower limit provides operational capability in colder environments. Both parts support the full upper temperature specification of 125°C.

Q: Are DC resistance specifications identical?

A: Yes. Both parts specify a maximum DC resistance of 980 mOhm, ensuring equivalent power dissipation and thermal performance at rated current levels.