RK73H1HTTC6490D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC6490D is a 649 Ohm ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in 0201 package format. This component meets automotive AEC-Q200 qualification standards and incorporates moisture-resistant construction suitable for demanding automotive applications.

The RK73H1HTTC6490D carries a "Not For New Designs" product status, indicating that KOA Speer Electronics has transitioned this part to end-of-life phase. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support existing production requirements for systems currently utilizing this component.

Substiute Parts

RK73H1HTTC6490D

KOA Speer Electronics, Inc.In Stock: 1019RK73H1HTTC6490D Datasheet

Current PartRFQ

RK73H1HTTCM6490D

KOA Speer Electronics, Inc.In Stock: 986RK73H1HTTCM6490D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC6490D is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (649 Ohms), tolerance (±0.5%), and power rating (0.05W) must be identical. Temperature coefficient (±200ppm/°C) and operating temperature range (-55°C ~ 155°C) establish thermal performance boundaries that cannot be compromised.

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

Compliance & Quality Parameters: AEC-Q200 automotive qualification, ROHS3 compliance, and Moisture Sensitivity Level 1 (Unlimited) are mandatory for applications requiring automotive-grade reliability and environmental compliance.

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

Substitute parts must satisfy all parameters listed above without exception. Parts differing in any of these criteria are not electrically or mechanically equivalent.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM6490D is the direct equivalent substitute for the RK73H1HTTC6490D. Both components are manufactured by KOA Speer Electronics, Inc., and share identical electrical, mechanical, and compliance specifications across all critical parameters.

The primary distinction between these parts is product lifecycle status: the RK73H1HTTC6490D is designated "Not For New Designs," while the RK73H1HTTCM6490D maintains "Active" status. This status difference reflects manufacturing continuity and supply chain availability rather than technical performance divergence.

For applications currently utilizing the RK73H1HTTC6490D, the RK73H1HTTCM6490D provides seamless functional replacement without circuit redesign, PCB layout modification, or assembly process adjustment. Both parts satisfy identical AEC-Q200 automotive qualification requirements, ROHS3 environmental compliance, and moisture resistance specifications.

Selection of the RK73H1HTTCM6490D is supported by its active product status, which ensures sustained manufacturing availability and supply chain stability for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM6490D be used as a direct replacement for the RK73H1HTTC6490D in existing designs?

A: Yes. Both components are electrically and mechanically identical across all specified parameters, including resistance value, tolerance, power rating, package format, temperature coefficient, operating temperature range, and automotive AEC-Q200 qualification. No circuit modification or PCB redesign is required.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC6490D?

A: This designation indicates that KOA Speer Electronics has transitioned the RK73H1HTTC6490D to end-of-life phase and is no longer recommending it for new product development. The RK73H1HTTCM6490D, with "Active" status, represents the current production equivalent and should be specified for new designs and ongoing production.

Q: Are there any differences in packaging or delivery format between these parts?

A: Both components utilize 0201 (0603 Metric) package format with identical physical dimensions. The main part information specifies Tape & Reel (TR) packaging; packaging format for the substitute was not specified in available data. Confirm packaging requirements with the supplier to ensure compatibility with assembly equipment and processes.

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

A: Yes. Both the RK73H1HTTC6490D and RK73H1HTTCM6490D are AEC-Q200 qualified, ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level 1 (Unlimited). They satisfy identical automotive-grade reliability and environmental compliance requirements.

Q: What is the current inventory status for these parts?

A: The RK73H1HTTC6490D has 954 pieces in stock. The RK73H1HTTCM6490D has 940 pieces in stock. Both quantities represent current availability; verify inventory status with the supplier for production planning purposes.

Q: Are there any thermal or electrical performance differences between these components?

A: No. Both parts share identical temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), power rating (0.05W), and thick film composition. Thermal and electrical performance characteristics are equivalent.