SCRH124-470 Equivalent & Substitute Parts

Part Overview

The SCRH124-470 is a 47 µH shielded inductor manufactured by Signal Transformer, rated for 1.87 A continuous current with a maximum DC resistance of 160mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 787 units in stock.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit operation within the electrical and mechanical tolerances of alternative manufacturers' offerings.

Substiute Parts

SCRH124-470

Signal TransformerIn Stock: 818SCRH124-470 Datasheet

Current PartRFQ

DRA124-470-R

Eaton - Electronics DivisionIn Stock: 1276DRA124-470-R Datasheet

MFR RecommendedRFQ

UP2B-470-R

Eaton - Electronics DivisionIn Stock: 1340UP2B-470-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124-470 is determined by the following critical parameters:

• Inductance Value: Must be 47 µH with ±20% tolerance
• Current Rating: Minimum 1.7 A continuous current capability
• DC Resistance: Maximum 160mOhm to maintain circuit performance
• Saturation Current: Minimum 1.4 A to prevent core saturation under operating conditions
• Shielding Configuration: Shielded construction to maintain electromagnetic compatibility
• Operating Temperature: Minimum -40°C to 85°C range
• Mounting Type: Surface mount, nonstandard package
• Physical Dimensions: 12.50mm x 12.50mm footprint with height compatibility
• Compliance: ROHS3 compliant, MSL 1 rating

Two substitute parts meet these criteria: the DRA124-470-R (Eaton, shielded wirewound) and the UP2B-470-R (Eaton, unshielded drum core wirewound). Both maintain the 47 µH inductance specification, operate within acceptable current and resistance parameters, and share the same footprint dimensions.

Parameter Comparison

Engineering Selection Recommendations

DRA124-470-R (Primary Substitute)

The DRA124-470-R is the preferred substitute when supply of the SCRH124-470 is constrained. This Eaton wirewound inductor maintains shielded construction, matching the electromagnetic isolation properties of the original part. The DRA124-470-R delivers lower DC resistance (134 mOhm versus 160 mOhm), reducing I²R losses in the circuit. Saturation current is elevated at 2.91 A, providing additional margin above the 1.87 A operating point. The extended operating temperature range (-40°C to 165°C) accommodates applications requiring higher thermal performance. Both parts share identical footprint dimensions (12.50 x 12.50 x 4.50 mm), enabling direct PCB layout compatibility. ROHS3 compliance and MSL 1 rating are maintained.

UP2B-470-R (Secondary Substitute)

The UP2B-470-R serves as an alternative when shielding requirements are not critical to circuit function. This Eaton drum core wirewound inductor operates at 1.7 A continuous current, remaining within acceptable margins of the 1.87 A specification. DC resistance of 138.8 mOhm is lower than the original part, reducing power dissipation. The unshielded construction reduces electromagnetic compatibility in noise-sensitive applications. Physical dimensions differ (13.97 x 10.41 x 6.00 mm), requiring PCB layout verification. Operating temperature range is limited to -40°C to 85°C, restricting use in high-temperature environments. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable only when EMI isolation is not a design constraint.

Frequently Asked Questions (FAQ)

Q: Can the DRA124-470-R replace the SCRH124-470 in all applications?

A: The DRA124-470-R is electrically compatible with the SCRH124-470 across the specified inductance, current, and resistance parameters. Both parts are shielded, maintain identical footprint dimensions, and operate within overlapping temperature ranges. Substitution is valid for applications operating at or below 125°C. Applications requiring operation above 125°C benefit from the DRA124-470-R's extended temperature rating to 165°C.

Q: What are the key differences between the DRA124-470-R and UP2B-470-R?

A: The DRA124-470-R is shielded wirewound construction, while the UP2B-470-R is unshielded drum core wirewound. The DRA124-470-R maintains the shielded topology of the original SCRH124-470, preserving EMI performance. The UP2B-470-R has a larger physical footprint (13.97 x 10.41 mm versus 12.50 x 12.50 mm) and operates only to 85°C maximum. DC resistance is lower in both substitutes, reducing power loss. Current ratings are slightly lower (1.78 A and 1.7 A respectively) but remain within acceptable operating margins.

Q: Is the UP2B-470-R suitable for my application if shielding is not required?

A: The UP2B-470-R is electrically compatible when electromagnetic shielding is not a design requirement. Verify that the larger physical dimensions (13.97 x 10.41 x 6.00 mm) fit within available PCB space. Confirm that the maximum operating temperature of 85°C meets your application's thermal requirements. The lower saturation current of 1.4 A provides less margin above the 1.87 A specification compared to other substitutes.

Q: Are all three parts ROHS3 compliant?

A: Yes. The SCRH124-470, DRA124-470-R, and UP2B-470-R are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, meeting environmental and reliability standards for industrial and commercial applications.

Q: What is the impact of lower DC resistance in the substitute parts?

A: Lower DC resistance (134 mOhm in DRA124-470-R and 138.8 mOhm in UP2B-470-R versus 160 mOhm in SCRH124-470) reduces resistive power loss (I²R heating). This improves circuit efficiency and reduces thermal stress on the component. The lower resistance is a beneficial characteristic and does not compromise substitution validity.