SR731HTTCR62J Equivalent & Substitute Parts

Part Overview

The SR731HTTCR62J is a 620 mOhms current sense resistor manufactured by KOA Speer Electronics, Inc. This 0201 (0603 Metric) chip resistor is rated for 0.1W power dissipation and features automotive AEC-Q200 qualification with moisture-resistant thick film construction. The part is designated as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identification of equivalent and substitute parts is necessary to support existing designs, legacy system maintenance, and procurement continuity.

Substiute Parts

SR731HTTCR62J

KOA Speer Electronics, Inc.In Stock: 1107SR731HTTCR62J Datasheet

Current PartRFQ

SR731HTTCMR62J

KOA Speer Electronics, Inc.In Stock: 1067SR731HTTCMR62J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR731HTTCR62J is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 620 mOhms
• Tolerance: ±5%
• Power rating: 0.1W
• Temperature coefficient: 0 / +400 ppm/°C
• Operating temperature range: -55°C to 125°C

Mechanical Parameters:

• Package type: 0201 (0603 Metric)
• Physical dimensions: 0.024" L × 0.012" W (0.60mm × 0.30mm)
• Height seated (maximum): 0.010" (0.26mm)
• Number of terminations: 2

Compliance & Certification:

• Automotive AEC-Q200 qualification
• RoHS3 compliance
• Thick film composition
• Current sense application classification

Substitute parts must match all electrical and mechanical parameters without deviation. Compliance certifications and product status are secondary considerations that do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SR731HTTCMR62J is a direct functional equivalent to the SR731HTTCR62J. Both parts are manufactured by KOA Speer Electronics, Inc., belong to the SR73 series, and share identical electrical specifications, mechanical dimensions, and automotive compliance certifications.

The primary distinction between these parts is product status: the SR731HTTCR62J is designated "Not For New Designs," while the SR731HTTCMR62J carries an "Active" status. This indicates that the SR731HTTCMR62J represents the current production offering from the manufacturer for this specification class.

Both parts satisfy AEC-Q200 automotive qualification requirements, maintain ROHS3 compliance, and operate across the full -55°C to 125°C temperature range. The identical MSL 1 rating confirms equivalent moisture handling characteristics. Selection between these parts should be based on procurement availability and supply chain continuity rather than technical performance considerations.

Frequently Asked Questions (FAQ)

Q: Can the SR731HTTCMR62J be used as a direct replacement for the SR731HTTCR62J in existing designs?

A: Yes. The SR731HTTCMR62J is electrically and mechanically identical to the SR731HTTCR62J. All critical parameters—resistance value, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and automotive certifications—are equivalent. No circuit modifications or re-qualification are required.

Q: What is the significance of the "Not For New Designs" status on the SR731HTTCR62J?

A: This designation indicates that the manufacturer has transitioned this part to end-of-life status and recommends using the SR731HTTCMR62J for new applications. However, the SR731HTTCR62J remains functionally suitable for existing designs and legacy system support.

Q: Are there any differences in the physical package between these two parts?

A: No. Both parts use the 0201 (0603 Metric) package with identical dimensions of 0.024" L × 0.012" W (0.60mm × 0.30mm) and a maximum seated height of 0.010" (0.26mm). They are mechanically interchangeable on printed circuit boards.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the SR731HTTCR62J and SR731HTTCMR62J carry AEC-Q200 automotive qualification and are ROHS3 compliant. They are suitable for automotive applications requiring current sense resistor functionality.

Q: What is the difference between the "Moisture Resistant" feature listed for SR731HTTCR62J and its absence in the SR731HTTCMR62J description?

A: Both parts maintain identical MSL 1 (Unlimited) moisture sensitivity levels, indicating equivalent moisture handling performance. The descriptive terminology differs between datasheets, but the actual moisture protection characteristics are functionally equivalent.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts share identical temperature coefficients of 0 / +400 ppm/°C and operate across the same -55°C to 125°C range. Electrical performance, including resistance stability and power dissipation characteristics, is equivalent.

Q: Can these parts be used interchangeably in tape and reel packaging?

A: The SR731HTTCR62J is specified with Tape & Reel (TR) packaging. The SR731HTTCMR62J packaging specification is not provided in the available data. Verify packaging format with the supplier before procurement to ensure compatibility with automated assembly equipment.