SCRH104-180 Equivalent & Substitute Parts

Part Overview

The SCRH104-180 is an 18 µH shielded inductor manufactured by Signal Transformer, rated for 2.4 A continuous current with a maximum DC resistance of 84 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and is mounted as a surface mount device in a nonstandard package configuration.

Substiute Parts

SCRH104-180

Signal TransformerIn Stock: 970SCRH104-180 Datasheet

Current PartRFQ

SRR1050A-180Y

Bourns Inc.In Stock: 3701SRR1050A-180Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1050A-180Y from Bourns Inc. qualifies as a substitute for the SCRH104-180 based on the following critical parameters:

Inductance value matches at 18 µH, with the substitute offering a wider tolerance band of ±30% versus the original ±20%. The substitute provides superior current handling capability at 3.1 A continuous rating compared to 2.4 A, with a higher saturation current of 3.2 A versus 1.8 A. DC resistance is reduced to 51 mOhm maximum, representing a 39% improvement over the original 84 mOhm specification. Both components maintain shielded construction, operate across the identical temperature range of -40°C to 125°C, and employ surface mount technology. Physical dimensions are comparable within manufacturing tolerances. The substitute part carries active product status with AEC-Q200 automotive qualification and maintains ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-180Y is suitable for direct substitution in applications currently using the SCRH104-180. The substitute part offers enhanced electrical performance through reduced DC resistance and increased current capacity, providing design margin improvement. Active product status ensures long-term availability and supply chain stability compared to the obsolete original part. Both components maintain identical compliance certifications including ROHS3 and REACH unaffected status. The substitute carries AEC-Q200 automotive qualification, indicating suitability for demanding industrial and automotive applications. Physical dimensions remain compatible within standard manufacturing tolerances for nonstandard surface mount packages.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-180Y directly replace the SCRH104-180 in existing designs?

A: Yes. Both parts share identical inductance values of 18 µH, matching shielded construction, equivalent operating temperature ranges, and surface mount configuration. The substitute provides improved electrical characteristics with lower DC resistance and higher current ratings.

Q: What is the impact of the wider inductance tolerance on the SRR1050A-180Y?

A: The substitute specifies ±30% tolerance versus the original ±20%. For 18 µH inductance, this represents a tolerance band of 12.6 to 23.4 µH compared to 14.4 to 21.6 µH for the original. Circuit designs must accommodate this wider tolerance range if inductance precision is critical to performance.

Q: Are there physical compatibility concerns between these parts?

A: Dimensions are comparable, with the substitute measuring 0.402" L x 0.394" W x 0.201" H maximum versus the original 0.398" L x 0.362" W x 0.197" H. These differences fall within standard PCB layout tolerances for nonstandard surface mount packages.

Q: What compliance certifications apply to the substitute part?

A: The SRR1050A-180Y maintains ROHS3 compliance, REACH unaffected status, and carries AEC-Q200 automotive qualification. These certifications match or exceed the original part's compliance profile.

Q: Why is the substitute part's DC resistance significantly lower?

A: The SRR1050A-180Y employs drum core wirewound construction with ferrite material, resulting in 51 mOhm maximum resistance compared to 84 mOhm for the original. This 39% reduction in DC resistance decreases power dissipation and improves thermal performance in current-carrying applications.