RK73B1HTTC3R6J Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC3R6J is a 3.6 Ohms ±5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., designed for automotive applications with AEC-Q200 qualification. This 0201 package (0603 metric) component operates across -55°C to 155°C and dissipates 0.05W (1/20W). The part is currently classified as "Not For New Designs," necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73B1HTTC3R6J

KOA Speer Electronics, Inc.In Stock: 1150RK73B1HTTC3R6J Datasheet

Current PartRFQ

RK73B1HTTCM3R6J

KOA Speer Electronics, Inc.In Stock: 990RK73B1HTTCM3R6J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC3R6J is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (3.6 Ohms), tolerance (±5%), and power rating (0.05W) must be identical. Temperature coefficient (±400ppm/°C) and operating temperature range (-55°C ~ 155°C) establish thermal performance boundaries.

Mechanical Specifications: Package type (0201 / 0603 metric), physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and seated height (0.010" / 0.26mm maximum) must match exactly to ensure PCB compatibility and assembly process compatibility.

Compliance & Ratings: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating are mandatory for equivalent substitution in automotive applications.

Series Continuity: Parts must belong to the RK73B series to maintain design consistency and supply chain reliability.

Substitute parts identified below meet all specified parameters without deviation.

Parameter Comparison

Engineering Selection Recommendations

RK73B1HTTCM3R6J is the direct equivalent substitute for RK73B1HTTC3R6J. This part maintains identical electrical performance, mechanical compatibility, and automotive compliance specifications. The primary distinction is product status: RK73B1HTTCM3R6J is classified as "Active," indicating current manufacturing support and availability, whereas the original part is designated "Not For New Designs."

For applications currently using RK73B1HTTC3R6J, transition to RK73B1HTTCM3R6J is supported without design modification. Both parts are manufactured by KOA Speer Electronics, Inc., belong to the RK73B series, and carry identical AEC-Q200 automotive qualification and ROHS3 compliance certifications. Inventory availability of 937 pieces for the substitute part supports production continuity.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM3R6J be used as a direct replacement for RK73B1HTTC3R6J?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (3.6 Ohms), tolerance (±5%), power rating (0.05W), package type (0201), temperature coefficient (±400ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. No circuit redesign or PCB layout modification is required.

Q: What is the significance of the product status difference?

A: RK73B1HTTC3R6J is marked "Not For New Designs," indicating KOA Speer Electronics has discontinued active development and long-term support for this part number. RK73B1HTTCM3R6J is classified "Active," confirming ongoing manufacturing, quality assurance, and supply chain support. For new production and long-term applications, RK73B1HTTCM3R6J is the recommended part number.

Q: Are the packaging specifications identical?

A: Yes. Both parts use 0201 package (0603 metric) with identical physical dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). Assembly equipment settings, PCB footprints, and pick-and-place parameters remain unchanged.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both RK73B1HTTC3R6J and RK73B1HTTCM3R6J carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 (Unlimited) moisture sensitivity rating. They are suitable for automotive applications without additional qualification testing.

Q: Is there a difference in thermal performance?

A: No. Both parts have identical temperature coefficient (±400ppm/°C) and operating temperature range (-55°C ~ 155°C). Thermal behavior and derating curves are equivalent.