SCRH124-820 Equivalent & Substitute Parts

Part Overview

The SCRH124-820 is a 82 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 1.44 A continuous current with a maximum DC resistance of 260mOhm and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Substiute Parts

SCRH124-820

Signal TransformerIn Stock: 757SCRH124-820 Datasheet

Current PartRFQ

DR124-820-R

Eaton - Electronics DivisionIn Stock: 856DR124-820-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124-820 is determined by strict alignment of the following critical parameters:

Inductance Value: Must be 82 µH with ±20% tolerance to maintain circuit performance.

Current Rating: Substitute parts must support minimum 1.44 A continuous current. Parts with higher current ratings provide additional design margin and are acceptable.

DC Resistance: Maximum DCR of 260mOhm establishes the upper limit for power dissipation compatibility. Substitute parts meeting or exceeding this specification are functionally equivalent.

Shielding: Shielded construction is required to maintain electromagnetic compatibility in the target application.

Mounting Type: Surface mount configuration with identical package dimensions (12.50 x 12.50 x 4.50 mm) ensures mechanical interchangeability.

Operating Temperature Range: Must support -40°C to 125°C minimum to maintain reliability across specified environmental conditions.

Compliance: RoHS3 compliance and MSL Level 1 are mandatory for supply chain and manufacturing process compatibility.

The DR124-820-R from Eaton - Electronics Division meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The DR124-820-R qualifies as a direct substitute for the SCRH124-820 based on electrical and mechanical parameter equivalence. The substitute part demonstrates superior performance characteristics: current rating increased from 1.44 A to 1.7 A, saturation current increased from 1.3 A to 1.94 A, and DC resistance reduced from 260 mOhm to 255.3 mOhm. These improvements provide enhanced thermal performance and reduced power dissipation without compromising circuit functionality.

Both parts maintain identical compliance certifications (ROHS3, MSL Level 1) and operate within the same temperature envelope (-40°C to 125°C). Mechanical interchangeability is confirmed through matching package dimensions and surface mount configuration. Selection between these parts may be driven by inventory availability, lead time, or cost considerations, as both are Active status components suitable for production deployment.

Frequently Asked Questions (FAQ)

Q: Can the DR124-820-R be used as a direct replacement for the SCRH124-820 in existing designs?

A: Yes. The DR124-820-R meets all electrical and mechanical substitution criteria. Identical inductance value (82 µH), matching tolerance (±20%), equivalent shielding, and identical package dimensions (12.50 x 12.50 x 4.50 mm) confirm direct interchangeability. No circuit redesign is required.

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

A: The DR124-820-R supports 1.7 A versus the SCRH124-820's 1.44 A rating. This 18% increase in current capacity provides additional design margin and reduces thermal stress during operation. The substitute part will generate less heat at equivalent current levels due to lower DC resistance (255.3 mOhm vs. 260 mOhm).

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant, carry MSL Level 1 (Unlimited moisture sensitivity), and operate across -40°C to 125°C. Compliance certifications are identical, ensuring equivalent supply chain and manufacturing process compatibility.

Q: Does the substitute part's drum core construction affect performance compared to the original?

A: The DR124-820-R uses drum core, wirewound construction with ferrite material. This construction method delivers the specified 82 µH inductance with improved saturation characteristics (1.94 A vs. 1.3 A) and lower DC resistance. Performance is equivalent or superior within the specified parameter envelope.

Q: What parameters must remain constant for substitution to be valid?

A: Inductance value (82 µH ±20%), shielding (shielded), mounting type (surface mount), package dimensions (12.50 x 12.50 x 4.50 mm), and operating temperature range (-40°C to 125°C) must be maintained. Current rating and DC resistance may be equal or better in the substitute part.