RK73H1HTTC46R4D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC46R4D is a 46.4 Ohm ±0.5% 0.05W (1/20W) chip resistor in 0201 package (0603 Metric) manufactured by KOA Speer Electronics, Inc. This component features automotive AEC-Q200 qualification, moisture-resistant thick film construction, and is designed for high-reliability applications requiring precision resistance values in compact form factors.

The RK73H1HTTC46R4D carries a "Not For New Designs" product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production of systems currently utilizing this component.

Substiute Parts

RK73H1HTTC46R4D

KOA Speer Electronics, Inc.In Stock: 953RK73H1HTTC46R4D Datasheet

Current PartRFQ

RK73H1HTTCM46R4D

KOA Speer Electronics, Inc.In Stock: 796RK73H1HTTCM46R4D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC46R4D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 46.4 Ohms (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 (required for automotive applications)
• RoHS3 compliance (required for regulatory conformance)
• Moisture Sensitivity Level 1 (required for reliability)

Substitute parts must match all electrical and mechanical parameters without exception. Compliance certifications must be maintained or exceed the original specification.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM46R4D is a direct electrical and mechanical equivalent to the RK73H1HTTC46R4D. Both components are manufactured by KOA Speer Electronics, Inc., belong to the RK73H series, and share identical electrical specifications, package dimensions, and compliance certifications.

The primary distinction is product status: the RK73H1HTTC46R4D is designated "Not For New Designs," while the RK73H1HTTCM46R4D carries "Active" status. This makes the RK73H1HTTCM46R4D the appropriate selection for ongoing production and new applications requiring a 46.4 Ohm ±0.5% 0.05W 0201 automotive-grade thick film resistor.

Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating, ensuring compatibility with existing design requirements and regulatory frameworks.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM46R4D be used as a direct replacement for the RK73H1HTTC46R4D?

A: Yes. The RK73H1HTTCM46R4D is electrically and mechanically identical to the RK73H1HTTC46R4D. All critical parameters—resistance value, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and compliance certifications—are equivalent. Direct substitution is permissible without circuit redesign or re-qualification.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC46R4D?

A: "Not For New Designs" indicates that the manufacturer has transitioned this part to end-of-life status and recommends using alternative parts for new applications. The RK73H1HTTCM46R4D, with "Active" status, is the recommended successor for new designs while maintaining full compatibility with existing implementations.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the RK73H1HTTC46R4D and RK73H1HTTCM46R4D are packaged in 0201 (0603 Metric) format with dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints and assembly processes remain unchanged.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both components carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating. They are suitable for automotive and high-reliability applications without additional qualification testing.

Q: What is the tolerance specification, and does it affect substitution?

A: Both parts specify ±0.5% tolerance on the 46.4 Ohm resistance value. This tight tolerance is maintained across both components, ensuring equivalent circuit performance and no substitution restrictions based on tolerance considerations.

Q: Are there any differences in moisture resistance between these parts?

A: Both components feature moisture-resistant thick film construction and carry MSL 1 (Unlimited) moisture sensitivity level. Moisture handling, storage, and assembly requirements are identical.