SCRH127/LD-5R8 Equivalent & Substitute Parts

Part Overview

The SCRH127/LD-5R8 is a 5.8 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 7.7 A continuous current with a maximum DC resistance of 16.2 mOhm. This component is designed for applications requiring compact, shielded inductance in nonstandard packaging. The part is currently active in production and widely available in inventory. Substitute parts may be required due to supply constraints, lead time considerations, or specific application requirements within the defined electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value	Unit
Inductance	5.8	µH
Inductance Tolerance	±30%	%
Current Rating	7.7	A
Saturation Current (Isat)	8.6	A
DC Resistance (DCR) Max	16.2	mOhm
Shielding	Shielded	—
Operating Temperature Range	-40 to 125	°C
Mounting Type	Surface Mount	—
Package Size (L × W)	12.50 × 12.50	mm
Height (Seated Max)	8.00	mm
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH127/LD-5R8 is determined by the following critical parameters:

Inductance Value: Substitute parts must fall within the ±30% tolerance band of 5.8 µH (range: 4.06 µH to 7.54 µH)
Current Rating: Substitute parts must support a minimum continuous current rating of 7.7 A
Saturation Current: Substitute parts must maintain saturation current at or above 8.6 A
DC Resistance: Substitute parts must not exceed 16.2 mOhm maximum
Shielding: Substitute parts must be shielded to maintain electromagnetic isolation
Operating Temperature: Substitute parts must support the full -40°C to 125°C range
Mounting Type: Substitute parts must be surface mount compatible
Package Dimensions: Substitute parts must fit within or match the 12.50 × 12.50 mm footprint and 8.00 mm height constraints
Compliance: Substitute parts must maintain ROHS3 compliance and MSL 1 rating

The CDRH127L125NP-6R2NC meets all substitution criteria within these defined parameters.

Parameter Comparison

Parameter	SCRH127/LD-5R8 (Main)	CDRH127L125NP-6R2NC (Substitute)	Compatibility
Manufacturer	Signal Transformer	Sumida America Components Inc.	Different manufacturer
Inductance	5.8 µH	6.2 µH	Within ±30% tolerance band
Inductance Tolerance	±30%	±30%	Matched
Current Rating	7.7 A	7.5 A	Substitute rated 0.2 A lower
Saturation Current (Isat)	8.6 A	10.2 A	Substitute exceeds requirement
DC Resistance (DCR) Max	16.2 mOhm	14.6 mOhm Max	Substitute lower resistance
Shielding	Shielded	Shielded	Matched
Operating Temperature	-40 to 125°C	-40 to 125°C	Matched
Mounting Type	Surface Mount	Surface Mount	Matched
Package Size (L × W)	12.50 × 12.50 mm	12.00 × 12.00 mm	Substitute smaller footprint
Height (Seated Max)	8.00 mm	8.00 mm	Matched
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
MSL Rating	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Active	Active	Both in production

Engineering Selection Recommendations

Both the SCRH127/LD-5R8 and CDRH127L125NP-6R2NC are active production components with ROHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility. The CDRH127L125NP-6R2NC substitute provides equivalent electrical performance within the specified parameter ranges, with the following considerations:

The substitute part exhibits a 6.2 µH inductance value, which falls within the ±30% tolerance specification of the main part. The DC resistance of 14.6 mOhm is lower than the 16.2 mOhm maximum, resulting in reduced power dissipation. The saturation current of 10.2 A exceeds the 8.6 A requirement, providing additional margin. The continuous current rating of 7.5 A is 0.2 A lower than the main part's 7.7 A rating; applications operating at or near the 7.7 A threshold should account for this difference. The substitute part's smaller footprint (12.00 × 12.00 mm versus 12.50 × 12.50 mm) may provide layout advantages while maintaining the same 8.00 mm height. Both parts maintain identical operating temperature ranges and moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can the CDRH127L125NP-6R2NC be used as a direct replacement for the SCRH127/LD-5R8?

A: Yes, within the defined electrical and mechanical parameter ranges. The substitute part meets all critical specifications including inductance tolerance, current rating, DC resistance, shielding, temperature range, and compliance certifications. The 0.2 A difference in continuous current rating should be evaluated for applications operating at maximum rated current.

Q: What is the inductance tolerance range for substitution?

A: Substitute parts must have inductance values within ±30% of 5.8 µH, which establishes a range of 4.06 µH to 7.54 µH. The CDRH127L125NP-6R2NC at 6.2 µH falls within this range.

Q: Does the smaller package size of the substitute part affect compatibility?

A: The CDRH127L125NP-6R2NC has a footprint of 12.00 × 12.00 mm compared to the main part's 12.50 × 12.50 mm. Both maintain the same 8.00 mm height. The smaller footprint may provide layout benefits and will not cause mechanical interference in applications designed for the larger package.

Q: Are there compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant with MSL 1 ratings. The substitute part carries AEC-Q200 automotive qualification, which the main part specification does not indicate. Both parts are classified under the same HTSUS code (8504.50.8000) and ECCN (EAR99).

Q: What is the impact of the lower DC resistance in the substitute part?

A: The substitute part's 14.6 mOhm maximum DC resistance is lower than the main part's 16.2 mOhm maximum. This results in reduced resistive losses and lower heat generation during operation, which is a favorable characteristic for thermal performance.

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