Equivalent & Substitute Parts for RK73B1HTTC391G

Part Overview

The RK73B1HTTC391G is a 390 Ohm ±2% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format (0.60mm x 0.30mm metric). This component is manufactured by KOA Speer Electronics, Inc. and meets automotive AEC-Q200 qualification standards. 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

RK73B1HTTC391G

KOA Speer Electronics, Inc.In Stock: 882RK73B1HTTC391G Datasheet

Current PartRFQ

RK73B1HTTCM391G

KOA Speer Electronics, Inc.In Stock: 639RK73B1HTTCM391G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC391G is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (390 Ohms), tolerance (±2%), and power rating (0.05W) must be identical. Temperature coefficient (±200ppm/°C) and operating temperature range (-55°C ~ 155°C) establish thermal performance boundaries.

Mechanical Specifications: Package format (0201 / 0603 Metric), physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and number of terminations (2) must match exactly.

Compliance & Ratings: AEC-Q200 automotive qualification, RoHS3 compliance, and MSL 1 rating are mandatory for substitution in automotive applications.

Composition: Thick film construction is required to maintain performance characteristics.

Parts meeting all these criteria are classified as direct equivalents and may be substituted without circuit redesign or performance verification.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM391G is a direct equivalent substitute for the RK73B1HTTC391G. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73B series and share identical electrical, mechanical, and compliance specifications.

The primary distinction is product status: RK73B1HTTC391G is classified as Not For New Designs, while RK73B1HTTCM391G maintains Active status. For new design implementations and ongoing production applications, RK73B1HTTCM391G is the appropriate selection. Both parts maintain AEC-Q200 automotive qualification and ROHS3 compliance, ensuring compatibility in automotive-grade applications.

Substitution between these parts does not require circuit redesign, performance verification, or thermal analysis, as all critical parameters remain identical.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM391G be used as a direct replacement for RK73B1HTTC391G in existing designs?

A: Yes. Both parts are electrically and mechanically identical with matching 390 Ohm resistance, ±2% tolerance, 0.05W power rating, 0201 package format, and AEC-Q200 automotive qualification. Direct substitution is permissible without circuit modification.

Q: What is the significance of the product status difference between these parts?

A: RK73B1HTTC391G is classified as Not For New Designs, indicating it is in end-of-life phase. RK73B1HTTCM391G maintains Active status and is the recommended selection for new production and design implementations. Existing inventory of RK73B1HTTC391G may be used for maintenance and repair of fielded equipment.

Q: Are there any package or footprint differences between these substitutes?

A: No. Both parts utilize identical 0201 (0603 Metric) package format with matching physical 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 interchangeable.

Q: Do both parts meet the same compliance and certification standards?

A: Yes. Both RK73B1HTTC391G and RK73B1HTTCM391G are AEC-Q200 qualified for automotive applications, ROHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity rating. Compliance profiles are identical.

Q: What is the temperature performance range for these resistors?

A: Both parts operate across -55°C to 155°C with a temperature coefficient of ±200ppm/°C. This specification applies uniformly to both the main part and substitute.