SR73W2HTTER124F Equivalent & Substitute Parts

Part Overview

The SR73W2HTTER124F 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. The part features a resistance value of 124 mOhms with ±1% tolerance, rated for 0.75W power dissipation in a 2010 (5025 Metric) surface mount package. The component is AEC-Q200 qualified, moisture resistant, and operates across the temperature range of -55°C to 150°C. This part is currently active in production. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when inventory constraints require alternative procurement channels.

Substiute Parts

SR73W2HTTER124F

KOA Speer Electronics, Inc.In Stock: 928SR73W2HTTER124F Datasheet

Current PartRFQ

SR732HTTER124F

KOA Speer Electronics, Inc.In Stock: 4673SR732HTTER124F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR73W2HTTER124F is based on electrical and mechanical parameter equivalence within the SR73 series of current sense resistors. The substitute part SR732HTTER124F maintains identical specifications across all critical parameters that determine functional compatibility: resistance value, tolerance, power rating, package dimensions, temperature coefficient, operating temperature range, and automotive qualification level.

The substitution logic is based on the following key parameters:

• Resistance value: 124 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.75W (exact match required)
• Package type: 2010 (5025 Metric) (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 150°C (exact match required)
• Automotive compliance: AEC-Q200 (exact match required)
• Composition: Thick Film (exact match required)

Both parts are manufactured by KOA Speer Electronics, Inc., belong to the SR73 series, and carry identical compliance certifications including ROHS3 and AEC-Q200 qualification.

Parameter Comparison

Engineering Selection Recommendations

Both the SR73W2HTTER124F and SR732HTTER124F are active production parts manufactured by KOA Speer Electronics, Inc., with full compliance to automotive standards and environmental regulations. Selection between these parts is based on availability and procurement requirements rather than technical differentiation.

The SR73W2HTTER124F is suitable for applications requiring current sense measurement in automotive systems operating within the -55°C to 150°C temperature range. The part's AEC-Q200 qualification ensures reliability in automotive environments, while ROHS3 compliance and REACH unaffected status satisfy regulatory requirements for automotive and industrial applications.

The SR732HTTER124F provides an equivalent alternative with identical electrical and mechanical specifications. Both parts are suitable for direct substitution in current sense applications where the 124 mOhms resistance value, ±1% tolerance, and 0.75W power rating are specified design requirements.

Selection should be based on inventory availability, lead time requirements, and supplier preference, as all technical parameters are equivalent between the two part numbers.

Frequently Asked Questions (FAQ)

Q: Can SR732HTTER124F be used as a direct replacement for SR73W2HTTER124F?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (124 mOhms), tolerance (±1%), power rating (0.75W), package dimensions (2010/5025 Metric), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 150°C), and AEC-Q200 automotive qualification. Direct substitution is supported without circuit modification.

Q: Are there any differences in the package or mounting footprint?

A: No. Both parts use the identical 2010 (5025 Metric) surface mount package with dimensions of 0.197" L x 0.098" W (5.00mm x 2.50mm) and maximum seated height of 0.028" (0.70mm). PCB footprints and reflow profiles are identical.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both SR73W2HTTER124F and SR732HTTER124F carry AEC-Q200 qualification, confirming suitability for automotive applications. Both are ROHS3 compliant and REACH unaffected.

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

A: The part numbers differ in their base designations (SR73W2H versus SR73 2H), but this reflects internal KOA Speer Electronics manufacturing or packaging variations. All electrical and mechanical specifications are identical, and both parts are sourced from the same manufacturer.

Q: Is the moisture sensitivity level the same for both parts?

A: Yes. Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture bake requirements prior to reflow soldering.

Q: Can these parts be used interchangeably in production?

A: Yes. Both parts are active production components with identical specifications. They can be used interchangeably in manufacturing, provided that procurement and inventory systems are updated to reflect the substitution.

Q: What is the temperature coefficient specification, and does it differ between the parts?

A: Both parts have a temperature coefficient of ±100ppm/°C, indicating identical resistance stability across the operating temperature range of -55°C to 150°C.