SCRH104-270 Equivalent & Substitute Parts

Part Overview

The SCRH104-270 is a 27 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 1.95 A and maximum DC resistance of 110mOhm. 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 meets ROHS3 compliance requirements.

Substiute Parts

SCRH104-270

Signal TransformerIn Stock: 1216SCRH104-270 Datasheet

Current PartRFQ

SRR1050A-270Y

Bourns Inc.In Stock: 1509SRR1050A-270Y Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH104-270 is based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 27 µH (exact match required)
• Inductance tolerance: Must accommodate circuit design margins
• Current rating: Must equal or exceed 1.95 A operational requirement
• DC resistance: Lower or equal values acceptable; higher values require circuit validation
• Shielding: Shielded configuration required for EMI performance
• Mounting type: Surface mount compatibility mandatory
• Operating temperature range: Must span -40°C to 125°C minimum
• Package dimensions: Physical footprint compatibility with PCB layout

The SRR1050A-270Y from Bourns Inc. meets all primary substitution criteria with improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SRR1050A-270Y qualifies as a direct substitute for the obsolete SCRH104-270 based on the following factors:

Electrical Performance: The substitute part meets or exceeds all critical electrical specifications. The 27 µH inductance value is identical, current rating is 33% higher (2.6 A vs. 1.95 A), and DC resistance is 30% lower (77 mOhm vs. 110 mOhm). Saturation current performance is superior at 2.7 A compared to 1.45 A.

Compliance & Certification: Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1). The substitute carries AEC-Q200 qualification, indicating automotive-grade reliability standards.

Physical Compatibility: Dimensional differences are minimal. The substitute is 0.1mm larger in length and width, and 0.1mm taller. PCB layout verification is required to confirm clearance compatibility with existing designs.

Product Status: The substitute part is active in production with confirmed inventory availability (1497 pcs), ensuring long-term procurement viability compared to the obsolete SCRH104-270.

Frequently Asked Questions (FAQ)

Q: Can the SRR1050A-270Y be used as a direct replacement without circuit modifications?

A: The SRR1050A-270Y meets all primary electrical and mechanical substitution criteria. However, verify PCB layout clearance due to minor dimensional differences (0.1mm increases in length, width, and height). No circuit modifications are required if physical space permits.

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

A: The SRR1050A-270Y exhibits 77 mOhm maximum DC resistance compared to 110 mOhm in the original part. Lower resistance reduces power dissipation and heat generation, improving overall circuit efficiency. This is a beneficial characteristic for thermal performance.

Q: Does the wider inductance tolerance of the substitute part affect circuit performance?

A: The SRR1050A-270Y carries ±30% tolerance versus ±20% for the SCRH104-270. For applications requiring tighter inductance control, circuit design margins must accommodate the wider tolerance band. Most standard filtering and impedance matching applications tolerate this variance.

Q: Are there packaging differences between these parts?

A: The SCRH104-270 uses nonstandard packaging, while the SRR1050A-270Y is supplied in Tape & Reel (TR) format. Both are surface mount components with identical mounting type compatibility. Verify tape specifications for automated assembly equipment compatibility.

Q: What certifications does the substitute part carry?

A: The SRR1050A-270Y meets AEC-Q200 automotive qualification standards, ROHS3 compliance, and REACH unaffected status. These certifications exceed the original part's compliance profile, making it suitable for applications requiring enhanced reliability documentation.