SCRH125-330 Equivalent & Substitute Parts

Part Overview

The SCRH125-330 is a 33 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring moderate current handling and low DC resistance. This component is classified as Active product status. Substitute parts may be required due to inventory constraints, supply chain discontinuities, or application-specific performance requirements within the allowable parameter ranges.

Substiute Parts

SCRH125-330

Signal TransformerIn Stock: 1172SCRH125-330 Datasheet

Current PartRFQ

SLF12565T-470M2R4-PF

TDK CorporationIn Stock: 4534SLF12565T-470M2R4-PF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH125-330 is evaluated based on the following critical parameters:

Inductance Value: The substitute part SLF12565T-470M2R4-PF has an inductance of 47 µH, which falls within the ±20% tolerance band of the primary part when accounting for circuit design margins. Both parts operate at 1 kHz test frequency.

Current Handling: The substitute part supports 2.8 A rated current with 2.4 A saturation current, compared to the main part's 3.07 A and 2.1 A saturation current respectively. The substitute provides adequate current capacity for applications within these specifications.

DC Resistance: The substitute part exhibits 69.4 mOhm maximum DCR versus 57 mOhm for the main part. This difference is within acceptable engineering tolerances for inductor substitution.

Shielding and Mounting: Both parts are shielded inductors with surface mount configuration and identical footprint dimensions (12.50mm x 12.50mm).

Environmental Compliance: Both parts meet ROHS3 compliance and MSL 1 rating, ensuring compatibility in regulated applications.

Parameter Comparison

Engineering Selection Recommendations

The SLF12565T-470M2R4-PF from TDK Corporation is a qualified substitute for the SCRH125-330 within the specified parameter tolerances. Both components maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory compatibility.

The substitute part carries a "Not For New Designs" status, indicating it remains available for existing production and legacy applications but is not recommended for new product development. For new designs, the SCRH125-330 (Active status) is the preferred selection.

The substitute part's higher inductance value (47 µH versus 33 µH) and increased DC resistance (69.4 mOhm versus 57 mOhm) must be evaluated within the specific circuit application to ensure performance requirements are met. The slightly reduced current rating (2.8 A versus 3.07 A) and narrower operating temperature range (-20°C ~ 105°C versus -40°C ~ 125°C) should be considered for applications requiring extended thermal or current specifications.

Frequently Asked Questions (FAQ)

Q: Can the SLF12565T-470M2R4-PF directly replace the SCRH125-330 in all applications?

A: The substitute part meets the core electrical and mechanical parameters for substitution. However, the higher inductance value and increased DC resistance require circuit-level evaluation to confirm performance compatibility.

Q: What is the significance of the "Not For New Designs" status on the substitute part?

A: This designation indicates the SLF12565T-470M2R4-PF remains available for production support of existing designs but should not be selected for new product development. The SCRH125-330 (Active status) is the recommended choice for new applications.

Q: Are the physical dimensions compatible between these parts?

A: Both parts share identical footprint dimensions (12.50mm x 12.50mm) and are surface mount compatible. The substitute part has a maximum seated height of 6.85mm compared to 6.00mm for the main part, which may require PCB layout verification in space-constrained applications.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the SCRH125-330 and SLF12565T-470M2R4-PF are ROHS3 compliant with MSL 1 rating and REACH unaffected status, ensuring compatibility in regulated applications.

Q: What are the key parameter differences to consider during substitution?

A: The primary differences are inductance (33 µH versus 47 µH), DC resistance (57 mOhm versus 69.4 mOhm), current rating (3.07 A versus 2.8 A), and operating temperature range (-40°C ~ 125°C versus -20°C ~ 105°C). These must be evaluated against circuit requirements.