SR73W2HTTER249F Equivalent & Substitute Parts

Part Overview

The SR73W2HTTER249F is an automotive-grade current sense resistor manufactured by KOA Speer Electronics, Inc. This thick film chip resistor is designed for precision current measurement applications in automotive systems requiring AEC-Q200 compliance. The part features a resistance value of 249 mOhms with ±1% tolerance, rated for 0.75W continuous power dissipation in a 2010 (5025 Metric) surface mount package. The component is actively produced and maintains robust inventory availability. Equivalent and substitute parts are identified to support procurement flexibility, design redundancy, and supply chain continuity.

Substiute Parts

SR73W2HTTER249F

KOA Speer Electronics, Inc.In Stock: 954SR73W2HTTER249F Datasheet

Current PartRFQ

SR732HTTER249F

KOA Speer Electronics, Inc.In Stock: 4897SR732HTTER249F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR73W2HTTER249F is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part SR732HTTER249F maintains identical specifications in the following key areas:

• Resistance Value: 249 mOhms (exact match)
• Tolerance: ±1% (exact match)
• Power Rating: 0.75W (exact match)
• Package Footprint: 2010 (5025 Metric) (exact match)
• Temperature Coefficient: ±100ppm/°C (exact match)
• Operating Temperature Range: -55°C ~ 150°C (exact match)
• Automotive Compliance: AEC-Q200 (exact match)
• Composition: Thick Film (exact match)
• Moisture Sensitivity: MSL 1 (Unlimited) (exact match)
• RoHS Compliance: ROHS3 Compliant (exact match)

Both parts are manufactured by KOA Speer Electronics, Inc., belong to the SR73 series, and are supplied in Tape & Reel packaging. The substitution is based on complete parameter alignment with no deviations in electrical performance, thermal characteristics, or environmental ratings.

Parameter Comparison

Engineering Selection Recommendations

Both the SR73W2HTTER249F and SR732HTTER249F are active production components from KOA Speer Electronics, Inc., with full AEC-Q200 automotive qualification. Selection between these parts is based on availability and supply chain considerations rather than technical differentiation.

The SR73W2HTTER249F maintains 891 pieces in current inventory stock. The SR732HTTER249F provides significantly higher inventory availability at 4,847 pieces in stock, offering enhanced procurement flexibility for high-volume applications or extended lead-time mitigation.

Both parts satisfy identical electrical performance requirements, thermal operating ranges, and environmental compliance standards. The choice between these components does not impact circuit performance, reliability, or regulatory compliance. Selection should be driven by inventory availability, procurement timeline, and supply chain strategy.

Frequently Asked Questions (FAQ)

Q: Are SR73W2HTTER249F and SR732HTTER249F electrically interchangeable?

A: Yes. Both parts are electrically identical with matching resistance values (249 mOhms), tolerance (±1%), power ratings (0.75W), and temperature coefficients (±100ppm/°C). They operate across the same temperature range (-55°C ~ 150°C) and maintain identical AEC-Q200 automotive compliance.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use the identical 2010 (5025 Metric) package footprint with matching physical dimensions (0.197" L x 0.098" W, 5.00mm x 2.50mm) and height specifications (0.028" maximum seated height). PCB layout and assembly processes require no modification.

Q: What is the difference between SR73W2HTTER249F and SR732HTTER249F?

A: The parts are functionally and electrically identical. The difference lies in the base product number designation (SR73W2H versus SR732H) and current inventory levels. The SR732HTTER249F has higher stock availability (4,847 pieces versus 891 pieces).

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both SR73W2HTTER249F and SR732HTTER249F are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for automotive applications.

Q: What is the moisture sensitivity level for these resistors?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly.

Q: Can these parts be used in automotive applications?

A: Yes. Both parts carry AEC-Q200 automotive qualification, certifying suitability for automotive-grade applications with appropriate reliability and quality standards.