SCRH124-221 Equivalent & Substitute Parts

Part Overview

The SCRH124-221 is a 220 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 950 mA continuous current with a maximum DC resistance of 700 mOhm. This component is designed for applications requiring electromagnetic shielding in compact nonstandard packages. The part is Active status and ROHS3 compliant, suitable for industrial and commercial electronics requiring reliable inductance in constrained board layouts.

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit alternative electrical or mechanical characteristics within acceptable tolerance ranges.

Substiute Parts

SCRH124-221

Signal TransformerIn Stock: 957SCRH124-221 Datasheet

Current PartRFQ

DRA124-221-R

Eaton - Electronics DivisionIn Stock: 1019DRA124-221-R Datasheet

MFR RecommendedRFQ

UP2B-221-R

Eaton - Electronics DivisionIn Stock: 1967UP2B-221-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124-221 is determined by the following critical parameters:

• Inductance Value: Must be 220 µH with ±20% tolerance
• Current Rating: Minimum 950 mA continuous current capability
• DC Resistance: Maximum 700 mOhm to maintain circuit performance
• Mounting Type: Surface mount configuration required
• Package Dimensions: Nonstandard 12.50mm x 12.50mm footprint
• Shielding Requirement: Electromagnetic shielding capability
• Operating Temperature: Minimum -40°C to 125°C range
• Compliance: ROHS3 compliant, MSL 1 rating

The two qualified substitutes (DRA124-221-R and UP2B-221-R) meet the core inductance and tolerance specifications. However, each presents distinct trade-offs in current handling, DC resistance, shielding characteristics, and thermal performance that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

DRA124-221-R (Eaton - Electronics Division)

The DRA124-221-R is the primary substitute candidate. It maintains identical inductance value and tolerance, preserves shielded construction, and offers superior DC resistance (568 mOhm versus 700 mOhm maximum). The part supports extended operating temperature to 165°C and carries AEC-Q200 automotive qualification. Current rating of 865 mA represents a 9% reduction from the SCRH124-221, which may be acceptable in applications with design margin. Identical package footprint (12.50mm x 12.50mm x 4.50mm) ensures direct PCB compatibility. ROHS3 compliance and MSL 1 rating match the original specification.

UP2B-221-R (Eaton - Electronics Division, UNI-PAC™ Series)

The UP2B-221-R qualifies as a secondary substitute with significant trade-offs. It maintains inductance specification and ROHS3 compliance but operates as an unshielded component, eliminating electromagnetic shielding benefits of the original design. Current rating of 773 mA represents a 19% reduction. Operating temperature maximum of 85°C is substantially lower than the SCRH124-221 specification. Package dimensions differ (13.97mm L x 10.41mm W x 6.00mm H), requiring PCB layout verification. DC resistance of 671.7 mOhm remains within acceptable range. This substitute is suitable only for applications where shielding is not critical and thermal environment does not exceed 85°C.

Frequently Asked Questions (FAQ)

Q: Can DRA124-221-R directly replace SCRH124-221 in all applications?

A: DRA124-221-R is compatible for most applications. The 9% lower current rating (865 mA versus 950 mA) requires verification that circuit design includes adequate margin. Identical package dimensions and shielded construction ensure PCB and electromagnetic compatibility. AEC-Q200 qualification provides additional reliability assurance for automotive and industrial environments.

Q: What are the limitations of UP2B-221-R as a substitute?

A: UP2B-221-R has three significant limitations: (1) unshielded construction eliminates electromagnetic shielding, unsuitable for noise-sensitive circuits; (2) maximum operating temperature of 85°C restricts use in high-temperature environments; (3) different package dimensions (13.97mm x 10.41mm x 6.00mm) require PCB layout modification. Current rating of 773 mA is 19% lower than the original. This substitute is applicable only when shielding is not required and thermal environment remains below 85°C.

Q: Are all substitutes ROHS3 compliant?

A: Yes. SCRH124-221, DRA124-221-R, and UP2B-221-R are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the primary difference between DRA124-221-R and UP2B-221-R?

A: DRA124-221-R maintains shielded construction with higher current rating (865 mA) and extended temperature range (-40°C to 165°C), making it the preferred substitute. UP2B-221-R is unshielded with lower current rating (773 mA) and restricted temperature range (-40°C to 85°C), suitable only for applications where shielding is unnecessary and thermal conditions are moderate.

Q: Do package dimension differences affect PCB compatibility?

A: DRA124-221-R uses identical package dimensions (12.50mm x 12.50mm x 4.50mm) as SCRH124-221, ensuring direct PCB compatibility without layout modification. UP2B-221-R has different dimensions (13.97mm x 10.41mm x 6.00mm), requiring PCB layout verification and potential redesign of component placement and routing.