RK73B1HTTC514G Equivalent & Substitute Parts

Part Overview

The RK73B1HTTC514G is a 510 kOhms ±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 The part is currently classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

RK73B1HTTC514G

KOA Speer Electronics, Inc.In Stock: 1041RK73B1HTTC514G Datasheet

Current PartRFQ

RK73B1HTTCM514G

KOA Speer Electronics, Inc.In Stock: 887RK73B1HTTCM514G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73B1HTTC514G is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (510 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 Parameters: Package format (0201 / 0603 Metric) and physical dimensions (0.024" L x 0.012" W, height 0.010" max) ensure PCB footprint compatibility and assembly process compatibility.

Compliance Parameters: AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating are mandatory for applications requiring automotive-grade reliability and environmental compliance.

Composition: Thick film construction must be maintained to preserve electrical characteristics and thermal behavior.

Substitute parts must match all these parameters without exception. Deviations in any parameter category disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The RK73B1HTTCM514G is the direct substitute for RK73B1HTTC514G. Both parts are manufactured by KOA Speer Electronics within the RK73B series and maintain identical electrical, mechanical, and thermal specifications. The primary distinction is product lifecycle status: the original part is classified as "Not For New Designs," while the substitute is Active.

For new designs and ongoing production, RK73B1HTTCM514G should be selected. This part maintains full compatibility with existing PCB layouts, assembly processes, and circuit performance requirements. Both parts satisfy automotive AEC-Q200 qualification and ROHS3 environmental compliance, ensuring regulatory and reliability standards are met in automotive and industrial applications.

The substitute part is available in active inventory (863 Pcs), supporting supply chain continuity and production scheduling.

Frequently Asked Questions (FAQ)

Q: Can RK73B1HTTCM514G be used as a direct replacement for RK73B1HTTC514G in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The RK73B1HTTCM514G shares the same 510 kOhms resistance, ±2% tolerance, 0.05W power rating, 0201 package, and AEC-Q200 automotive qualification. PCB footprints, assembly processes, and circuit performance remain unchanged.

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

A: The original part (RK73B1HTTC514G) is marked "Not For New Designs," indicating it has been superseded in the manufacturer's product lifecycle. The substitute (RK73B1HTTCM514G) is Active, meaning it is the current production part and recommended for all new applications. Existing inventory of the original part may be used until depleted, but new designs should transition to the Active substitute.

Q: Are there any thermal or environmental performance differences?

A: No. Both parts operate across the identical temperature range (-55°C ~ 155°C) with the same temperature coefficient (±200ppm/°C). Moisture sensitivity level (MSL 1) and storage/handling requirements are identical.

Q: Is the 0201 package compatible with standard PCB assembly equipment?

A: Yes. The 0201 package (0.60mm x 0.30mm metric) is a standard surface-mount format supported by modern pick-and-place equipment and reflow soldering processes. Physical dimensions and termination count (2) are identical between both parts.

Q: Do both parts meet automotive compliance requirements?

A: Yes. Both RK73B1HTTC514G and RK73B1HTTCM514G are AEC-Q200 qualified and ROHS3 compliant. They are suitable for automotive applications requiring automotive-grade reliability and environmental compliance.