SCRH104-121 Equivalent & Substitute Parts

Part Overview

The SCRH104-121 is a 120 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 870 mA continuous current with a maximum DC resistance of 450mOhm. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance standards.

Substiute Parts

SCRH104-121

Signal TransformerIn Stock: 844SCRH104-121 Datasheet

Current PartRFQ

SRR1050A-121Y

Bourns Inc.In Stock: 2442SRR1050A-121Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1050A-121Y from Bourns Inc. qualifies as a functional substitute based on the following critical parameters:

Inductance value matches at 120 µH with compatible tolerance specifications. Both parts maintain shielded construction and surface mount configuration. Operating temperature range is identical at -40°C to 125°C. Physical dimensions are comparable within acceptable assembly tolerances (10.20mm L x 10.00mm W x 5.10mm H versus 10.10mm L x 9.20mm W x 5.00mm H). Both components achieve ROHS3 compliance and MSL 1 rating.

The SRR1050A-121Y provides superior electrical performance with higher current rating (1.18 A versus 870 mA) and lower DC resistance (305 mOhm versus 450 mOhm), making it suitable for applications requiring the SCRH104-121 specifications.

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-121Y is the designated substitute for the obsolete SCRH104-121. Selection is based on matching inductance value, identical operating temperature range, equivalent shielding characteristics, and compatible surface mount package footprint. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating.

The SRR1050A-121Y carries AEC-Q200 automotive qualification and active product status, ensuring long-term availability and supply chain stability. The substitute part delivers improved electrical performance with higher current handling capability and reduced DC resistance, providing design margin for applications originally specified with the SCRH104-121.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-121Y directly replace the SCRH104-121 in existing designs?

A: Yes. Both parts share identical 120 µH inductance at 100 kHz test frequency, matching operating temperature range, shielded construction, and surface mount configuration. Physical dimensions are within acceptable assembly tolerances for standard PCB layouts.

Q: What are the key differences between these parts?

A: The SRR1050A-121Y provides higher current rating (1.18 A versus 870 mA), lower DC resistance (305 mOhm versus 450 mOhm), and wider inductance tolerance (±30% versus ±20%). The substitute maintains active product status with AEC-Q200 qualification.

Q: Are there compliance or regulatory differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under EAR99. MSL rating is identical at level 1 (unlimited moisture sensitivity). No compliance barriers exist for substitution.

Q: How do the package dimensions affect PCB layout compatibility?

A: Dimensions differ slightly (SRR1050A-121Y: 10.20mm x 10.00mm x 5.10mm versus SCRH104-121: 10.10mm x 9.20mm x 5.00mm). These variations fall within standard PCB assembly tolerances and do not require layout redesign for typical applications.

Q: What is the inductance tolerance impact on circuit performance?

A: The SCRH104-121 specifies ±20% tolerance while the SRR1050A-121Y allows ±30%. For applications sensitive to inductance variation, component selection within tighter tolerance bands may be necessary during procurement.