SCRH104-181 Equivalent & Substitute Parts

Part Overview

The SCRH104-181 is a 180 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 720 mA and maximum DC resistance of 840mOhm. 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

SCRH104-181

Signal TransformerIn Stock: 967SCRH104-181 Datasheet

Current PartRFQ

SRR1050A-181Y

Bourns Inc.In Stock: 2941SRR1050A-181Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SRR1050A-181Y qualifies as a functional substitute for the SCRH104-181 based on the following critical parameters:

Matching Parameters:

• Inductance value: 180 µH (identical)
• Inductance test frequency: 100 kHz (identical)
• Shielding: Shielded (identical)
• Operating temperature range: -40°C to 125°C (identical)
• Mounting type: Surface Mount (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Moisture sensitivity: MSL 1 (identical)

Allowable Variations:

• Current rating: 1 A (SRR1050A-181Y) vs. 720 mA (SCRH104-181) — higher rating provides margin
• DC resistance: 420 mOhm Max (SRR1050A-181Y) vs. 840 mOhm Max (SCRH104-181) — lower resistance is acceptable
• Saturation current: 1.04 A (SRR1050A-181Y) vs. 570 mA (SCRH104-181) — higher saturation current is acceptable
• Inductance tolerance: ±30% (SRR1050A-181Y) vs. ±20% (SCRH104-181) — wider tolerance is acceptable for most applications
• Package dimensions: 10.20mm L x 10.00mm W x 5.10mm H (SRR1050A-181Y) vs. 10.10mm L x 9.20mm W x 5.00mm H (SCRH104-181) — minimal dimensional difference

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-181Y is the recommended substitute for the obsolete SCRH104-181. The substitute part maintains identical inductance value and test frequency while providing improved electrical performance through lower DC resistance and higher current rating. Both components meet ROHS3 compliance and operate within the same temperature range. The SRR1050A-181Y carries active product status from Bourns Inc., ensuring long-term availability and supply chain continuity. The minimal dimensional variation is compatible with standard surface mount assembly processes. The AEC-Q200 qualification of the substitute part provides additional reliability assurance for automotive and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-181Y directly replace the SCRH104-181 in existing designs?

A: Yes. Both parts share identical inductance values (180 µH), test frequencies (100 kHz), shielding characteristics, operating temperature ranges, and mounting types. The substitute part offers improved electrical performance with lower DC resistance and higher current rating. Package dimensions differ by less than 1% in each axis, compatible with standard PCB layouts.

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

A: The SRR1050A-181Y provides 420 mOhm maximum DC resistance compared to 840 mOhm maximum in the SCRH104-181. Lower DC resistance reduces power dissipation and heat generation in the inductor, improving circuit efficiency and thermal performance.

Q: Does the wider inductance tolerance of the SRR1050A-181Y affect circuit performance?

A: The SRR1050A-181Y specifies ±30% tolerance versus ±20% for the SCRH104-181. Circuit designs must accommodate the wider tolerance range. Applications requiring tighter inductance control should evaluate tolerance impact on circuit specifications.

Q: Are there packaging differences between these parts?

A: Both parts use surface mount packaging with nonstandard case dimensions. The SRR1050A-181Y is supplied in Tape & Reel format, while the SCRH104-181 packaging format is not specified. Dimensional differences are minimal (approximately 1% variation per axis) and do not affect standard PCB assembly compatibility.

Q: What compliance certifications apply to the substitute part?

A: The SRR1050A-181Y meets ROHS3 compliance, REACH unaffected status, and carries AEC-Q200 qualification. These certifications align with the ROHS3 compliance of the original part and provide additional automotive-grade reliability assurance.