RK73G1HTTC4301D Equivalent & Substitute Parts

Part Overview

The RK73G1HTTC4301D is a 4.3 kOhms ±0.5% chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards. The part is currently classified as "Not For New Designs," which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73G1HTTC4301D

KOA Speer Electronics, Inc.In Stock: 749RK73G1HTTC4301D Datasheet

Current PartRFQ

RK73G1HTTCM4301D

KOA Speer Electronics, Inc.In Stock: 867RK73G1HTTCM4301D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73G1HTTC4301D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 4.3 kOhms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package type: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

• Automotive qualification: AEC-Q200 (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)

The substitute part must satisfy all parameters listed above without deviation. Product status (Active vs. Not For New Designs) does not affect electrical or mechanical compatibility but indicates availability for new design implementations.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM4301D is a direct functional equivalent to the RK73G1HTTC4301D. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73G series and share identical electrical specifications, mechanical dimensions, and automotive compliance certifications.

The primary distinction is product status: the original part (RK73G1HTTC4301D) is designated "Not For New Designs," while the substitute (RK73G1HTTCM4301D) maintains "Active" status. This status change reflects manufacturing lifecycle management and does not indicate any change in component performance, reliability, or qualification level.

Both parts satisfy AEC-Q200 automotive qualification requirements, ROHS3 compliance, and MSL 1 moisture sensitivity classification. Selection between these parts should be based on availability and supply chain requirements rather than technical performance considerations.

Frequently Asked Questions (FAQ)

Q: Can RK73G1HTTCM4301D be used as a direct replacement for RK73G1HTTC4301D in existing designs?

A: Yes. The substitute part is electrically and mechanically identical across all specified parameters, including resistance value, tolerance, power rating, package dimensions, temperature range, and automotive certification. Direct substitution is supported without circuit redesign or validation.

Q: What does "Not For New Designs" mean for the original part?

A: This designation indicates that the RK73G1HTTC4301D has been transitioned out of active production. The part may still be available from existing inventory but is not recommended for new product development. The RK73G1HTTCM4301D, with Active status, is the recommended choice for ongoing and future applications.

Q: Are the package dimensions identical between both parts?

A: Yes. Both parts use the 0201 (0603 Metric) package with dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints and assembly processes are identical.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73G1HTTC4301D and RK73G1HTTCM4301D are AEC-Q200 qualified for automotive applications and maintain identical operating temperature ranges of -55°C to 155°C.

Q: Is there any difference in RoHS or environmental compliance?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). Environmental and regulatory compliance is identical.

Q: What is the temperature coefficient specification, and is it the same for both parts?

A: The temperature coefficient for both parts is ±50ppm/°C, indicating identical thermal stability characteristics across the operating temperature range.