SCRH127B-820 Equivalent & Substitute Parts

Part Overview

The SCRH127B-820 is a 82 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 2 A continuous current with a maximum DC resistance of 160 mOhm. This component is designed for applications requiring fixed inductance in compact nonstandard packages and is currently in active production status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

SCRH127B-820

Signal TransformerIn Stock: 927SCRH127B-820 Datasheet

Current PartRFQ

B82477G4823M000

EPCOS - TDK ElectronicsIn Stock: 997B82477G4823M000 Datasheet

MFR RecommendedRFQ

DR125-820-R

Eaton - Electronics DivisionIn Stock: 67853DR125-820-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCRH127B-820 are qualified based on the following electrical and mechanical parameters:

• Inductance Value: Must be 82 µH with ±20% tolerance
• Current Rating: Must support minimum 2 A continuous current
• DC Resistance: Must not exceed 160 mOhm maximum
• Saturation Current: Must maintain adequate margin above rated current
• Shielding: Must be shielded construction
• Mounting: Must be surface mount compatible
• Operating Temperature: Must cover -40°C to 125°C range
• Test Frequency: Must be characterized at 100 kHz
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The identified substitute parts meet these criteria while maintaining functional equivalence for circuit applications requiring this inductance value and current handling capability.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and ROHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility across applications.

B82477G4823M000 (EPCOS - TDK Electronics): This substitute provides improved DC resistance performance at 145 mOhm and extended lower temperature operation to -55°C. The current rating of 1.9 A is marginally below the 2 A specification; applications operating continuously at or above 1.9 A should verify saturation margin requirements. Saturation current of 2.25 A provides adequate headroom above rated current.

DR125-820-R (Eaton - Electronics Division): This substitute offers the lowest DC resistance at 128 mOhm and the highest current rating at 2.05 A, providing superior thermal performance and current handling margin. Operating temperature range matches the original specification at -40°C to 125°C. Saturation current of 2.39 A ensures robust performance across the rated current range. This part is available in highest inventory volume.

Frequently Asked Questions (FAQ)

Q: Can B82477G4823M000 be used in applications requiring continuous 2 A operation?

A: The B82477G4823M000 is rated for 1.9 A continuous current, which is 0.1 A below the SCRH127B-820 specification. Applications operating at or above 1.9 A should evaluate whether the reduced current margin is acceptable for the specific circuit design.

Q: What is the primary difference between the substitute parts?

A: The primary differences are current rating and DC resistance. DR125-820-R provides the highest current rating (2.05 A) and lowest DC resistance (128 mOhm), while B82477G4823M000 offers extended lower temperature operation (-55°C) with moderate DC resistance (145 mOhm). All three parts maintain identical inductance value and tolerance.

Q: Are there mechanical compatibility concerns when substituting these parts?

A: All parts are surface mount inductors in nonstandard packages. Physical dimensions vary slightly: SCRH127B-820 and DR125-820-R are 12.50mm × 12.50mm, while B82477G4823M000 is 12.80mm × 12.80mm. Height differs: SCRH127B-820 is 8.00mm, B82477G4823M000 is 8.00mm, and DR125-820-R is 6.00mm. PCB layout and clearance requirements should be verified for each substitute.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, MSL 1 rated, and maintain REACH unaffected status with EAR99 ECCN classification.

Q: Which substitute part provides the best thermal performance?

A: DR125-820-R provides the lowest DC resistance at 128 mOhm, resulting in the lowest resistive heating at rated current compared to the original 160 mOhm specification.