Equivalent & Substitute Parts for RK73H1HTTC4322D

Part Overview

The RK73H1HTTC4322D is a 43.2 kOhms ±0.5% thick film chip resistor in 0201 package (0603 metric) rated for 0.05W (1/20W) power dissipation. This component is designed for automotive applications with AEC-Q200 qualification and moisture-resistant construction. The part carries a "Not For New Designs" status, indicating it has been superseded in the manufacturer's product line.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

RK73H1HTTC4322D

KOA Speer Electronics, Inc.In Stock: 693RK73H1HTTC4322D Datasheet

Current PartRFQ

RK73H1HTTCM4322D

KOA Speer Electronics, Inc.In Stock: 785RK73H1HTTCM4322D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC4322D is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-negotiable):

• Resistance value: 43.2 kOhms
• Tolerance: ±0.5%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical Parameters (Non-negotiable):

• Package type: 0201 (0603 Metric)
• Physical dimensions: 0.024" L × 0.012" W (0.60mm × 0.30mm)
• Maximum seated height: 0.010" (0.26mm)
• Number of terminations: 2

Compliance & Certification Parameters (Non-negotiable):

• Automotive rating: AEC-Q200
• Moisture resistance: Required
• RoHS status: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1

Substitute parts must match all parameters listed above. Product status (Active vs. Not For New Designs) does not affect electrical or mechanical substitutability but indicates design transition opportunity.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM4322D is a direct electrical and mechanical equivalent to the RK73H1HTTC4322D. Both components are manufactured by KOA Speer Electronics within the RK73H series and share identical specifications across all critical parameters: 43.2 kOhms ±0.5% resistance, 0.05W power rating, 0201 package form factor, ±200ppm/°C temperature coefficient, and -55°C to 155°C operating range.

The primary distinction is product lifecycle status: RK73H1HTTC4322D carries "Not For New Designs" designation, while RK73H1HTTCM4322D is classified as Active. This indicates that RK73H1HTTCM4322D represents the current production alternative within the manufacturer's portfolio.

Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating. The substitute part is suitable for direct replacement in existing designs and is the recommended choice for new automotive applications requiring this resistance value and package specification.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM4322D be used as a direct replacement for RK73H1HTTC4322D in automotive circuits?

A: Yes. Both parts are electrically and mechanically identical with matching resistance (43.2 kOhms ±0.5%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating range (-55°C to 155°C), and AEC-Q200 automotive qualification. No circuit redesign or validation is required for substitution.

Q: What does "Not For New Designs" mean for the RK73H1HTTC4322D?

A: This status indicates the part has been superseded in the manufacturer's active product line. While existing inventory remains available and the part continues to function identically to its substitute, KOA Speer recommends using RK73H1HTTCM4322D for new design implementations to ensure long-term supply continuity.

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

A: Yes. Both components are 0.024" L × 0.012" W (0.60mm × 0.30mm) in the 0201 package with maximum seated height of 0.010" (0.26mm). PCB footprints and assembly processes are interchangeable.

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

A: Yes. Both RK73H1HTTC4322D and RK73H1HTTCM4322D are ROHS3 compliant, AEC-Q200 qualified for automotive use, moisture resistant, and rated MSL 1 (unlimited moisture sensitivity level). Compliance certifications are equivalent.

Q: What is the difference between these parts if they are electrically identical?

A: The only substantive difference is manufacturing status. RK73H1HTTCM4322D is the current active production part, while RK73H1HTTC4322D is legacy inventory. Electrical performance, mechanical form factor, and all certifications are identical. The substitute represents the manufacturer's current recommendation for this specification.

Q: Can I mix these parts in the same production batch?

A: Yes. Since both parts are electrically and mechanically equivalent with identical specifications and certifications, they can be used interchangeably within the same assembly without functional impact. However, for traceability and supply chain consistency, using a single part number per production run is recommended.