SCRH125-471 Equivalent & Substitute Parts

Part Overview

The SCRH125-471 is a 470 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 830 mA continuous current with a maximum DC resistance of 770 mOhm. This component is classified as Active and is available in Tape & Reel packaging with a nonstandard 12.50mm × 12.50mm footprint.

Substitute parts become necessary when the primary component reaches end-of-life status, experiences supply constraints, or when design requirements mandate alternative manufacturers for redundancy and supply chain resilience.

Substiute Parts

SCRH125-471

Signal TransformerIn Stock: 1144SCRH125-471 Datasheet

Current PartRFQ

SLF12565T-471MR70-H

TDK CorporationIn Stock: 1831SLF12565T-471MR70-H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH125-471 is determined by strict equivalence across the following electrical and mechanical parameters:

• Inductance value: 470 µH ±20%
• Inductance tolerance: ±20%
• Current rating: minimum 830 mA continuous
• Saturation current: minimum 580 mA
• DC resistance: maximum 770 mOhm
• Shielding: Shielded construction required
• Mounting: Surface mount only
• Footprint: 12.50mm × 12.50mm
• Operating temperature: -40°C to 125°C minimum
• Environmental compliance: ROHS3 Compliant

The substitute part SLF12565T-471MR70-H meets the core inductance and temperature specifications but exhibits higher DC resistance (924 mOhm) and lower current rating (750 mA), requiring circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SCRH125-471 remains the primary selection for new designs due to its Active product status and superior electrical performance characteristics, specifically the lower DC resistance (770 mOhm vs. 924 mOhm) and higher current rating (830 mA vs. 750 mA).

The SLF12565T-471MR70-H substitute from TDK Corporation is classified as Not For New Designs and carries AEC-Q200 automotive qualification. This part is suitable only for legacy design support or supply chain contingency when the primary part is unavailable. The increased DC resistance and reduced current rating must be evaluated against circuit thermal and current distribution requirements before implementation.

Both parts maintain ROHS3 compliance and identical operating temperature ranges, ensuring environmental regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can SLF12565T-471MR70-H be used as a direct replacement for SCRH125-471?

A: Direct substitution requires circuit-level analysis. The SLF12565T-471MR70-H exhibits 154 mOhm higher DC resistance and 80 mA lower continuous current rating. Applications operating near the 830 mA specification or with tight thermal budgets may experience performance degradation.

Q: Are the physical footprints identical?

A: Both parts share the same 12.50mm × 12.50mm footprint. However, the SLF12565T-471MR70-H has a maximum seated height of 6.85mm compared to 6.00mm for the SCRH125-471. PCB clearance and component stacking must be verified.

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

A: This designation indicates the manufacturer is discontinuing the product line. The SLF12565T-471MR70-H is available for existing production support only and should not be selected for new product development.

Q: Are both parts RoHS compliant?

A: Yes. Both SCRH125-471 and SLF12565T-471MR70-H are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), meeting current environmental regulations.

Q: What is the significance of the higher saturation current in the substitute?

A: The SLF12565T-471MR70-H exhibits 700 mA saturation current versus 580 mA for the SCRH125-471. This indicates different core material or construction. The substitute maintains saturation margin above its 750 mA continuous rating, but the lower continuous rating remains the limiting factor for circuit design.