Equivalent & Substitute Parts for RK73B1HTTC394G

Part Overview

The RK73B1HTTC394G is a 390 kOhms ±2% thick film chip resistor rated at 0.05W (1/20W) in 0201 package format, manufactured by KOA Speer Electronics, Inc. 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

RK73B1HTTC394G

KOA Speer Electronics, Inc.In Stock: 721RK73B1HTTC394G Datasheet

Current PartRFQ

RK73B1HTTCM394G

KOA Speer Electronics, Inc.In Stock: 1210RK73B1HTTCM394G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73B1HTTC394G is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Resistance value (390 kOhms), 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), and seated height (0.010" max) ensure PCB layout and assembly compatibility.

Material & Composition: Thick film construction maintains electrical characteristics and reliability performance.

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 ensure manufacturing consistency and performance validation.

Substitute parts must match all parameters listed above. No deviations in electrical, mechanical, or compliance specifications are permitted for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM394G is the direct equivalent substitute for RK73B1HTTC394G. Both components are manufactured by KOA Speer Electronics, Inc., and maintain identical electrical, mechanical, and compliance specifications across all critical parameters.

The primary distinction is product status: RK73B1HTTC394G is classified as "Not For New Designs," while RK73B1HTTCM394G maintains "Active" status. This status difference reflects manufacturing lifecycle management and does not indicate any technical or performance divergence between the two parts.

For applications requiring AEC-Q200 automotive qualification, ROHS3 compliance, and 390 kOhms ±2% resistance in 0201 package format, RK73B1HTTCM394G is the recommended active alternative. Both parts are functionally and mechanically interchangeable within automotive circuit designs.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM394G be used as a direct replacement for RK73B1HTTC394G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same resistance value (390 kOhms), tolerance (±2%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. PCB layout and assembly processes require no modification.

Q: Why is RK73B1HTTC394G marked "Not For New Designs"?

A: This designation reflects KOA Speer Electronics' product lifecycle management. The part remains functionally valid but is being phased out in favor of RK73B1HTTCM394G, which carries "Active" status. For new design implementations, RK73B1HTTCM394G should be specified.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical compliance certifications: AEC-Q200 automotive rating, ROHS3 compliance, MSL 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification.

Q: What is the significance of the "M" designation in RK73B1HTTCM394G?

A: The "M" in the part number indicates a manufacturing or specification variant within the RK73B series. However, all electrical and mechanical parameters remain identical to RK73B1HTTC394G, ensuring full substitutability.

Q: Can these 0201 package resistors be used interchangeably with 0603 metric equivalents?

A: No. The 0201 package (0603 Metric designation) has specific physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm) and seated height (0.010" max). PCB footprints and assembly equipment are package-specific. Only components in identical 0201 package format are mechanically interchangeable.

Q: What inventory considerations apply to these parts?

A: RK73B1HTTC394G has 655 pieces in stock (Not For New Designs status). RK73B1HTTCM394G has 1117 pieces in stock (Active status). For ongoing production, RK73B1HTTCM394G availability is more favorable due to its active lifecycle status.