SCRH125B-680 Equivalent & Substitute Parts

Part Overview

The SCRH125B-680 is a 68 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 2 A continuous current with a maximum DC resistance of 130 mOhm. This component is designed for applications requiring fixed inductance in compact form factors with electromagnetic shielding. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial electronic assemblies. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified tolerance ranges.

Substiute Parts

SCRH125B-680

Signal TransformerIn Stock: 867SCRH125B-680 Datasheet

Current PartRFQ

CDRH127NP-680MC

Sumida America Components Inc.In Stock: 1962CDRH127NP-680MC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH125B-680 is determined by the following critical parameters:

Inductance Value: Must be 68 µH with ±20% tolerance to maintain circuit performance within design specifications.

Current Rating: Substitute parts must support minimum 2 A continuous current. Parts with higher current ratings (2.1 A or greater) are acceptable as they provide additional thermal margin.

DC Resistance: Maximum DCR of 130 mOhm establishes the upper limit for power dissipation. Substitute parts with DCR up to 140 mOhm remain within acceptable operating parameters for this application category.

Shielding: Electromagnetic shielding is mandatory. Only shielded inductors qualify as substitutes.

Mounting and Package: Surface mount configuration with nonstandard package dimensions (12.50 x 12.50 mm footprint, 6.20 mm maximum height) defines the mechanical compatibility envelope.

Environmental Compliance: RoHS3 compliance and MSL 1 rating are required for equivalent substitution.

The CDRH127NP-680MC meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

The CDRH127NP-680MC qualifies as a direct substitute for the SCRH125B-680 based on electrical equivalence and compliance status. Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility.

The substitute part provides a higher current rating (2.1 A versus 2 A), which increases thermal headroom in the application. The DC resistance differential (140 mOhm versus 130 mOhm maximum) represents a 7.7% increase and remains within acceptable power dissipation limits for this inductor category.

Physical dimensions show minor variations: the CDRH127NP-680MC has a slightly smaller footprint (12.00 x 12.00 mm versus 12.50 x 12.50 mm) but greater seated height (8.00 mm versus 6.20 mm). PCB layout and vertical clearance must be verified before substitution.

The operating temperature range of the substitute part (-40°C to 100°C) is narrower than the original (-40°C to 125°C). Applications requiring operation above 100°C must retain the SCRH125B-680.

Both parts are supplied in Tape & Reel packaging suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the CDRH127NP-680MC be used as a direct replacement for the SCRH125B-680 in all applications?

A: The CDRH127NP-680MC is electrically equivalent for applications operating within -40°C to 100°C. Applications requiring operation above 100°C must use the original SCRH125B-680. Verify PCB clearance for the increased height (8.00 mm versus 6.20 mm).

Q: What is the significance of the DC resistance difference between these parts?

A: The CDRH127NP-680MC has a maximum DCR of 140 mOhm compared to 130 mOhm for the SCRH125B-680. This 10 mOhm difference results in approximately 7.7% higher power dissipation at rated current. For most applications, this remains within acceptable thermal budgets.

Q: Are the footprints compatible?

A: The CDRH127NP-680MC footprint (12.00 x 12.00 mm) is slightly smaller than the SCRH125B-680 (12.50 x 12.50 mm), making it compatible with existing PCB layouts. However, the increased height (8.00 mm versus 6.20 mm) requires verification of vertical clearance in the assembly.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCRH125B-680 and CDRH127NP-680MC are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both are supplied in Tape & Reel packaging for automated assembly.

Q: What is the inductance tolerance for these parts?

A: Both parts are specified with ±20% inductance tolerance at 1 kHz test frequency. This tolerance band must be considered in circuit design to ensure performance across the full tolerance range.

Q: Why is shielding important for this inductor?

A: Electromagnetic shielding reduces radiated emissions and susceptibility to external magnetic fields. Both the SCRH125B-680 and CDRH127NP-680MC are shielded, maintaining this critical performance characteristic across substitution.