RK73H1HTTC4643D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC4643D is a 464 kOhms ±0.5% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction. The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active product alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

RK73H1HTTC4643D

KOA Speer Electronics, Inc.In Stock: 877RK73H1HTTC4643D Datasheet

Current PartRFQ

RK73H1HTTCM4643D

KOA Speer Electronics, Inc.In Stock: 1145RK73H1HTTCM4643D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC4643D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 464 kOhms (exact match required)
• Tolerance: ±0.5% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package / Case: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

• Automotive AEC-Q200 qualification (exact match required)
• RoHS3 compliance (exact match required)
• Moisture Sensitivity Level 1 (exact match required)

Substitute parts must maintain identical electrical performance, physical dimensions, and automotive qualification standards. The primary distinction between the main part and substitute alternatives is product status and manufacturing continuity.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM4643D is the direct equivalent substitute for the RK73H1HTTC4643D. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73H series and maintain identical electrical specifications, mechanical dimensions, and automotive compliance certifications.

Selection Basis:

The primary distinction is product lifecycle status. The RK73H1HTTC4643D is designated "Not For New Designs," indicating the manufacturer has transitioned this part to end-of-life status. The RK73H1HTTCM4643D carries "Active" product status, confirming ongoing manufacturing support and supply chain availability.

Both parts satisfy identical requirements for:

• Automotive AEC-Q200 qualification
• ROHS3 compliance
• Moisture Sensitivity Level 1 (unlimited shelf life)
• Electrical performance across the full operating temperature range (-55°C ~ 155°C)
• Physical compatibility in 0201 package footprints

For new designs and ongoing production, the RK73H1HTTCM4643D is the appropriate selection. For existing designs currently using the RK73H1HTTC4643D, direct substitution with the RK73H1HTTCM4643D is electrically and mechanically compatible without design modification.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM4643D be used as a direct replacement for the RK73H1HTTC4643D?

A: Yes. Both components are electrically and mechanically identical. They share the same resistance value (464 kOhms), tolerance (±0.5%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and automotive AEC-Q200 qualification. The RK73H1HTTCM4643D is the active production equivalent.

Q: What is the difference between these two part numbers?

A: The RK73H1HTTC4643D is classified as "Not For New Designs," indicating end-of-life status. The RK73H1HTTCM4643D is the active equivalent with ongoing manufacturing support. The "M" designation in the part number reflects the manufacturer's product line update. All electrical and mechanical specifications remain identical.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. Both components are manufactured by KOA Speer Electronics, Inc., and maintain identical physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm), height (0.010" / 0.26mm), and termination configuration (2 terminations). PCB footprints and assembly processes require no modification.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73H1HTTC4643D and RK73H1HTTCM4643D are AEC-Q200 qualified for automotive applications. Both maintain ROHS3 compliance and Moisture Sensitivity Level 1 (unlimited shelf life without baking requirements).

Q: Which part should be specified for new designs?

A: The RK73H1HTTCM4643D should be specified for new designs. This part carries "Active" product status, ensuring long-term supply chain availability and manufacturing continuity. The RK73H1HTTC4643D is no longer recommended for new design implementations.

Q: Are the temperature coefficients identical?

A: Yes. Both parts have a temperature coefficient of ±200ppm/°C and operate across the identical temperature range of -55°C ~ 155°C, ensuring equivalent performance stability across all operating conditions.