SCRH127B-221 Equivalent & Substitute Parts

Part Overview

The SCRH127B-221 is a 220 µH shielded inductor manufactured by Signal Transformer, rated for 1.44 A continuous current with a maximum DC resistance of 390mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 785 units in stock.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or when design requirements allow for alternative manufacturers meeting equivalent electrical and mechanical specifications.

Substiute Parts

SCRH127B-221

Signal TransformerIn Stock: 817SCRH127B-221 Datasheet

Current PartRFQ

DR125-221-R

Eaton - Electronics DivisionIn Stock: 1857DR125-221-R Datasheet

MFR RecommendedRFQ

DR127-221-R

Eaton - Electronics DivisionIn Stock: 7285DR127-221-R Datasheet

MFR RecommendedRFQ

DRA125-221-R

Eaton - Electronics DivisionIn Stock: 2534DRA125-221-R Datasheet

MFR RecommendedRFQ

DRA127-221-R

Eaton - Electronics DivisionIn Stock: 1293DRA127-221-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH127B-221 is determined by the following criteria:

• Inductance Value: Must be 220 µH with ±20% tolerance
• Shielding: Must be shielded construction
• Mounting Type: Must be surface mount
• Package Dimensions: Must be 12.50mm x 12.50mm footprint
• Current Rating: Must support minimum 1.44 A continuous current
• DC Resistance: Must not exceed 390mOhm
• Operating Temperature: Must support -40°C to 125°C range
• Compliance: Must be ROHS3 compliant

All four substitute parts meet these core electrical and mechanical parameters. Variations in saturation current, DCR values below the maximum threshold, and alternative core construction types do not disqualify substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products with ROHS3 compliance and meet the core electrical specifications of the SCRH127B-221. Selection between substitutes depends on application-specific requirements:

DR125-221-R and DR127-221-R are drum core wirewound inductors from Eaton with ferrite core construction. These parts offer lower DC resistance values (384mOhm and 376mOhm respectively) compared to the original specification maximum of 390mOhm. DR127-221-R provides the highest saturation current rating at 2.43 A and is available in the largest quantity (7230 units).

DRA125-221-R and DRA127-221-R are wirewound inductors from Eaton with extended operating temperature range to 165°C and AEC-Q200 automotive qualification. DRA125-221-R has the lowest current rating at 1.142 A, while DRA127-221-R provides 1.253 A with the highest saturation current at 2.35 A among the DRA series.

Height differences exist between 6.00mm (DR125-221-R, DRA125-221-R) and 8.00mm (DR127-221-R, DRA127-221-R, SCRH127B-221) variants. PCB layout constraints may influence selection between these options.

Frequently Asked Questions (FAQ)

Q: Can DR125-221-R be used as a direct replacement for SCRH127B-221?

A: DR125-221-R meets all core substitution criteria: 220 µH inductance, shielded construction, surface mount, 12.50mm x 12.50mm footprint, and ROHS3 compliance. The 1.19 A current rating is below the original 1.44 A specification. Substitution is valid only if circuit design allows operation at the lower current rating. The 6.00mm height is 2.00mm lower than the original part.

Q: What is the difference between DR and DRA series parts?

A: DR series parts use drum core wirewound construction with ferrite cores and operate to 125°C. DRA series parts are wirewound inductors with extended temperature range to 165°C and carry AEC-Q200 automotive qualification. Both series meet the 220 µH, shielded, surface mount requirements.

Q: Are there height restrictions for substitution?

A: The SCRH127B-221 has a maximum seated height of 8.00mm. DR125-221-R and DRA125-221-R are 6.00mm height, which is lower and compatible with designs accommodating the original height. DR127-221-R and DRA127-221-R match the 8.00mm height exactly. Height differences do not prevent substitution if PCB clearance exists.

Q: Which substitute part has the best current handling capability?

A: DR127-221-R provides the highest saturation current at 2.43 A, followed by DRA127-221-R at 2.35 A. For continuous current operation, DR127-221-R supports 1.29 A and DRA127-221-R supports 1.253 A, both exceeding the original 1.44 A specification.

Q: Do all substitute parts meet RoHS compliance?

A: All four substitute parts are ROHS3 compliant, matching the original SCRH127B-221 specification.

Q: What packaging formats are available for these substitutes?

A: DR125-221-R and DRA125-221-R are supplied in Tape & Reel (TR) format. DR127-221-R is available in Cut Tape (CT) & Digi-Reel® format. DRA127-221-R is supplied in Tape & Reel (TR) format.