SCRH124B-820 Equivalent & Substitute Parts

Part Overview

The SCRH124B-820 is a 82 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.44 A continuous current with a maximum DC resistance of 275mOhm. This component is designed for applications requiring fixed inductance in compact nonstandard packages and is currently in active production status with 938 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

SCRH124B-820

Signal TransformerIn Stock: 952SCRH124B-820 Datasheet

Current PartRFQ

DR124-820-R

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The DR124-820-R from Eaton - Electronics Division qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: 82 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Shielding classification: Shielded
• Operating temperature range: -40°C to 125°C
• Mounting type: Surface Mount
• Package dimensions: 12.50mm × 12.50mm (identical footprint)
• RoHS3 compliance and MSL 1 rating
• REACH unaffected status

Electrical Performance Considerations: The substitute part demonstrates improved electrical characteristics within the same package envelope: current rating of 1.7 A (versus 1.44 A), saturation current of 1.94 A (versus 1.3 A), and DC resistance of 255.3mOhm maximum (versus 275mOhm maximum). These parameters indicate the substitute can operate across the full range of applications designed for the primary part without derating.

Parameter Comparison

Engineering Selection Recommendations

Both the SCRH124B-820 and DR124-820-R maintain active product status and full compliance with ROHS3 and REACH regulations. The substitute part is suitable for direct replacement in applications where the primary component is unavailable.

The DR124-820-R exhibits superior electrical performance characteristics: higher current rating, higher saturation current, and lower DC resistance. These improvements provide additional design margin without requiring circuit modifications. The substitute part's slightly reduced seated height (4.50mm versus 4.80mm maximum) presents no compatibility issues for standard PCB assembly processes.

Selection between these parts should be based on availability and supply chain requirements rather than electrical performance, as the substitute part meets or exceeds all specified parameters of the primary component.

Frequently Asked Questions (FAQ)

Q: Can the DR124-820-R replace the SCRH124B-820 in existing designs?

A: Yes. Both parts share identical inductance values, tolerance specifications, shielding characteristics, and operating temperature ranges. The substitute part's improved current rating and lower DC resistance make it suitable for all applications designed for the primary component.

Q: Are there any PCB layout considerations when switching between these parts?

A: No. Both inductors share identical footprint dimensions of 12.50mm × 12.50mm. The DR124-820-R has a maximum seated height of 4.50mm compared to 4.80mm for the SCRH124B-820, which presents no clearance issues in standard designs.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SCRH124B-820 and DR124-820-R are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) ratings.

Q: What is the significance of the different core materials?

A: The SCRH124B-820 uses an unspecified core material, while the DR124-820-R uses a ferrite drum core with wirewound construction. Both achieve the same 82 µH inductance value and shielding performance at the specified test frequency of 100 kHz.

Q: How do the DC resistance values affect circuit performance?

A: The DR124-820-R exhibits lower DC resistance (255.3mOhm maximum versus 275mOhm maximum), resulting in reduced resistive losses and improved efficiency in current-carrying applications. This represents an improvement over the primary component specification.