Equivalent & Substitute Parts for RK73H1HTTC4642D

Part Overview

The RK73H1HTTC4642D is a 46.4 kOhms ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in 0201 package format with 0.05W power rating. This component is rated for automotive applications under AEC-Q200 standard and features moisture-resistant construction suitable for harsh operating environments.

The RK73H1HTTC4642D carries a product status of "Not For New Designs," indicating it has been superseded in the manufacturer's active product line. Identification of equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to actively supported alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73H1HTTC4642D

KOA Speer Electronics, Inc.In Stock: 964RK73H1HTTC4642D Datasheet

Current PartRFQ

RK73H1HTTCM4642D

KOA Speer Electronics, Inc.In Stock: 812RK73H1HTTCM4642D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC4642D is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (46.4 kOhms), 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.

Mechanical Parameters: Package format (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 layout compatibility and assembly process compatibility.

Compliance & Environmental Parameters: AEC-Q200 automotive rating, Moisture Sensitivity Level 1, RoHS3 compliance, and REACH unaffected status must be maintained. These parameters ensure the substitute part meets the same regulatory, environmental, and reliability standards as the original component.

Series Designation: Parts must belong to the RK73H series to ensure manufacturing consistency and performance characteristics.

Substitute parts identified below meet all stated parameters without exception.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM4642D is the direct equivalent substitute for the RK73H1HTTC4642D. Both components are manufactured by KOA Speer Electronics, Inc. within the RK73H series and share identical electrical, mechanical, and environmental specifications.

The primary distinction is product status: the original part (RK73H1HTTC4642D) is designated "Not For New Designs," while the substitute (RK73H1HTTCM4642D) maintains "Active" status within the manufacturer's current product portfolio. This status change reflects the manufacturer's ongoing support and availability commitment for the substitute part.

Both parts maintain full AEC-Q200 automotive compliance, ROHS3 certification, and MSL 1 moisture sensitivity rating. No functional, thermal, or reliability differences exist between the two components. The substitute part is suitable for direct replacement in existing designs and is the recommended selection for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM4642D be used as a direct replacement for RK73H1HTTC4642D in existing PCB assemblies?

A: Yes. The substitute part is electrically and mechanically identical. All parameters including resistance, tolerance, power rating, package dimensions, and thermal characteristics are equivalent. No PCB layout modifications or assembly process changes are required.

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

A: This designation indicates the manufacturer has transitioned the part to end-of-life status and recommends using the active substitute part for new design work. Existing inventory of the original part may still be available, but the substitute ensures long-term supply chain continuity and manufacturer support.

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

A: No. Both parts carry identical AEC-Q200 automotive ratings, ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity levels. Regulatory and environmental requirements are fully equivalent.

Q: Does the 0201 package format have any compatibility considerations?

A: The 0201 package is a miniature surface-mount format (0.60mm x 0.30mm). Both the original and substitute parts use this identical package. Assembly equipment, solder reflow profiles, and PCB pad designs remain unchanged between the two components.

Q: What is the difference between the part numbers RK73H1HTTC4642D and RK73H1HTTCM4642D?

A: The part numbers differ only in the suffix designation (C versus CM). This nomenclature change reflects the manufacturer's product line update while maintaining all functional and performance characteristics. The "M" designation in the substitute part number indicates the current active variant within the RK73H series.