RK73B1HTTC112G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC112G is a 1.1 kOhms ±2% 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," indicating that alternative solutions should be evaluated for new product development. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support legacy system maintenance.

Substiute Parts

RK73B1HTTC112G

KOA Speer Electronics, Inc.In Stock: 848RK73B1HTTC112G Datasheet

Current PartRFQ

RK73B1HTTCM112G

KOA Speer Electronics, Inc.In Stock: 941RK73B1HTTCM112G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC112G is determined by strict equivalence across the following critical parameters:

• Resistance Value: 1.1 kOhms (exact match required)
• Tolerance: ±2% (exact match required)
• Power Rating: 0.05W / 1/20W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature Coefficient: ±200ppm/°C (exact match required)
• Operating Temperature Range: -55°C ~ 155°C (exact match required)
• Automotive Compliance: AEC-Q200 (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

The substitute part RK73B1HTTCM112G meets all these criteria and is manufactured by the same supplier (KOA Speer Electronics, Inc.) within the same RK73B series. The primary distinction is the product status: the substitute part is classified as "Active," whereas the main part is "Not For New Designs."

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM112G is the recommended substitute for the RK73B1HTTC112G. Both parts are electrically and mechanically identical across all specified parameters. The substitute part maintains full compliance with AEC-Q200 automotive qualification, ROHS3 environmental standards, and all electrical specifications including resistance value, tolerance, power rating, and temperature performance.

The primary advantage of selecting the RK73B1HTTCM112G is its "Active" product status, which ensures continued manufacturer support, availability, and suitability for new design implementations. The RK73B1HTTC112G, classified as "Not For New Designs," should be reserved for legacy system maintenance and repair applications where component-level compatibility with existing assemblies is required.

Both parts are supplied by KOA Speer Electronics, Inc. within the RK73B series and are available in Tape & Reel packaging. Inventory availability should be verified with the supplier for production volume requirements.

Frequently Asked Questions (FAQ)

Q: Can the RK73B1HTTCM112G be used as a direct replacement for the RK73B1HTTC112G?

A: Yes. The RK73B1HTTCM112G is electrically and mechanically equivalent to the RK73B1HTTC112G. All critical parameters—resistance value, tolerance, power rating, package dimensions, temperature coefficient, operating temperature range, and automotive compliance—are identical. Direct substitution is permissible without circuit redesign.

Q: Why is the RK73B1HTTC112G marked as "Not For New Designs"?

A: The "Not For New Designs" designation indicates that the manufacturer has transitioned this part to end-of-life status. While existing inventory remains available for legacy applications, new product designs should utilize the RK73B1HTTCM112G, which carries "Active" status and ensures long-term availability and manufacturer support.

Q: Are there any packaging differences between these parts?

A: Both parts are supplied in the 0201 (0603 Metric) package with identical physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). The main part is specified as Tape & Reel (TR) packaging; packaging information for the substitute part was not provided in the available data.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73B1HTTC112G and RK73B1HTTCM112G are AEC-Q200 qualified, confirming suitability for automotive applications. Both are ROHS3 compliant and have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements.

Q: What is the temperature coefficient specification, and why is it important?

A: Both parts have a temperature coefficient of ±200ppm/°C. This specification defines the maximum change in resistance value per degree Celsius across the operating temperature range of -55°C to 155°C. This parameter is critical for precision analog circuits and must remain constant between the main part and any substitute.