SR73W2HTTER220F Equivalent & Substitute Parts

Part Overview

The SR73W2HTTER220F 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 220 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 compliant with RoHS3 and REACH regulations. 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

SR73W2HTTER220F

KOA Speer Electronics, Inc.In Stock: 986SR73W2HTTER220F Datasheet

Current PartRFQ

SR732HTTER220F

KOA Speer Electronics, Inc.In Stock: 4638SR732HTTER220F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR73W2HTTER220F is based on electrical and mechanical parameter equivalence within the SR73 series of current sense resistors. The substitute part SR732HTTER220F 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: 220 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 ~ 150°C (exact match required)
• Automotive qualification: 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.

Parameter Comparison

Engineering Selection Recommendations

The SR732HTTER220F serves as a direct functional equivalent to the SR73W2HTTER220F for current sense applications in automotive systems. Both parts are active products from KOA Speer Electronics, Inc., with identical electrical and mechanical specifications. Selection between these parts is based on availability and procurement requirements rather than technical performance differences.

Both parts maintain AEC-Q200 automotive qualification, ensuring compliance with automotive reliability standards. Both are RoHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for automotive applications. The MSL rating of 1 (Unlimited) for both parts indicates no moisture sensitivity constraints during storage or handling.

The 2010 (5025 Metric) package format is identical for both parts, ensuring direct compatibility with existing printed circuit board layouts and assembly processes. The thick film composition, temperature coefficient, and operating temperature range are equivalent, confirming functional interchangeability in current sensing circuits.

Frequently Asked Questions (FAQ)

Q: Can SR732HTTER220F be used as a direct replacement for SR73W2HTTER220F?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical resistance values, tolerances, power ratings, package dimensions, temperature coefficients, operating temperature ranges, and automotive qualifications. Direct substitution is supported without circuit redesign.

Q: Are there differences in the part numbering between SR73W2HTTER220F and SR732HTTER220F?

A: The part numbers differ in their base designations (SR73W2H versus SR732H), but both parts belong to the SR73 series and maintain identical specifications for all critical parameters. The variation in part numbering reflects different manufacturing or distribution batches within the same product family.

Q: What is the significance of the 2010 package designation?

A: The 2010 package designation refers to the surface mount chip resistor dimensions of 0.197" L x 0.098" W (5.00mm x 2.50mm). This metric designation (5025 Metric) is standardized across both parts, ensuring compatibility with existing PCB footprints and assembly equipment.

Q: Are both parts suitable for automotive applications?

A: Yes. Both SR73W2HTTER220F and SR732HTTER220F carry AEC-Q200 qualification, which certifies compliance with automotive reliability and quality standards. Both parts are approved for use in automotive current sensing circuits.

Q: What does the ±1% tolerance specification mean for current sensing applications?

A: The ±1% tolerance indicates that the actual resistance value will not deviate more than 1% from the nominal 220 mOhm specification. This tight tolerance is critical for accurate current measurement, as the voltage drop across the resistor is directly proportional to the current being sensed.

Q: Is there a difference in moisture sensitivity between these parts?

A: No. Both parts have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints. Both parts can be stored and handled without special moisture control measures.

Q: Can these parts be used interchangeably in high-temperature automotive environments?

A: Yes. Both parts are rated for operation across the -55°C to 150°C temperature range with a temperature coefficient of ±100ppm/°C. This specification ensures stable performance in automotive thermal environments.

Q: What is the power dissipation capability of these resistors?

A: Both parts are rated for 0.75W (3/4W) power dissipation. This rating determines the maximum current that can flow through the resistor without exceeding thermal limits. For a 220 mOhm resistor, this corresponds to a maximum continuous current of approximately 1.85A.