SR731HTTC2R40F Equivalent & Substitute Parts

Part Overview

The SR731HTTC2R40F is a 2.4 Ohms ±1% 0.1W thick film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0201 (0603 Metric) package. This component is designed for current sensing applications in automotive environments and meets AEC-Q200 qualification standards. The part is classified as "Not For New Designs," indicating that it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary to support existing designs, legacy system maintenance, and procurement continuity.

Substiute Parts

SR731HTTC2R40F

KOA Speer Electronics, Inc.In Stock: 814SR731HTTC2R40F Datasheet

Current PartRFQ

SR731HTTCM2R40F

KOA Speer Electronics, Inc.In Stock: 1132SR731HTTCM2R40F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR731HTTC2R40F is determined by strict equivalence across the following critical parameters:

• Resistance Value: 2.4 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 0.1W / 1/10W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: 0 / +400ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Automotive Qualification: AEC-Q200 (exact match required)
• Application Classification: Current Sense (exact match required)
• Compliance Standards: ROHS3 Compliant, REACH Unaffected (exact match required)

Substitute parts must satisfy all parameters listed above. Deviations in any single parameter disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The SR731HTTCM2R40F is a direct equivalent substitute for the SR731HTTC2R40F. Both parts are manufactured by KOA Speer Electronics, Inc., belong to the SR73 series, and share identical electrical and mechanical specifications. The primary distinction is product status: the original part is classified as "Not For New Designs," while the substitute is designated as "Active."

The substitute part maintains full compliance with ROHS3 and REACH standards, carries AEC-Q200 automotive qualification, and is suitable for current sensing applications across the specified operating temperature range of -55°C to 125°C. The substitute part is available in higher inventory quantities (1078 Pcs versus 795 Pcs), supporting procurement continuity and supply chain stability.

Selection of the SR731HTTCM2R40F is appropriate for both legacy system support and ongoing production requirements where the SR731HTTC2R40F is no longer available from the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can the SR731HTTCM2R40F be used as a direct replacement for the SR731HTTC2R40F?

A: Yes. The SR731HTTCM2R40F is a direct equivalent substitute. Both parts share identical resistance (2.4 Ohms), tolerance (±1%), power rating (0.1W), package (0201), composition (thick film), temperature coefficient, operating temperature range, and automotive qualification (AEC-Q200). No circuit modifications or design changes are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product lifecycle status. The SR731HTTC2R40F is designated "Not For New Designs," indicating it has been superseded. The SR731HTTCM2R40F is the active equivalent in the manufacturer's current product line. All electrical and mechanical parameters are identical.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry AEC-Q200 automotive qualification. Moisture sensitivity level is identical (MSL 1 - Unlimited) for both parts.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use the 0201 (0603 Metric) package with identical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm) and height (0.010" maximum seated height). PCB footprints and assembly processes are identical.

Q: Which part should be specified for new designs?

A: The SR731HTTCM2R40F should be specified for new designs, as it is the active product in the manufacturer's current portfolio. The SR731HTTC2R40F is not recommended for new designs.

Q: Are there any temperature or environmental performance differences?

A: No. Both parts operate across the identical temperature range (-55°C to 125°C) with the same temperature coefficient (0 / +400ppm/°C). Environmental performance and reliability characteristics are equivalent.