RK73H1HTTC3243D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC3243D is a 324 kOhms ±0.5% 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 thick film construction.

The RK73H1HTTC3243D carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's active product line. Identifying equivalent substitute parts ensures design continuity, maintains supply chain reliability, and provides access to components with active manufacturing support and improved availability.

Substiute Parts

RK73H1HTTC3243D

KOA Speer Electronics, Inc.In Stock: 866RK73H1HTTC3243D Datasheet

Current PartRFQ

RK73H1HTTCM3243D

KOA Speer Electronics, Inc.In Stock: 1099RK73H1HTTCM3243D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC3243D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 324 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 & Package Parameters:

• Package type: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)

Compliance & Quality Parameters:

• Automotive rating: AEC-Q200 (exact match required)
• RoHS status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Substitute parts must maintain identical electrical performance, physical dimensions, and automotive qualification standards to ensure functional and regulatory compatibility in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM3243D is the manufacturer-recommended substitute for the RK73H1HTTC3243D. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73H series and maintain identical electrical, mechanical, and compliance specifications.

Key Selection Factors:

Product Status: The RK73H1HTTC3243D is designated "Not For New Designs," indicating end-of-life status. The RK73H1HTTCM3243D carries "Active" product status, confirming ongoing manufacturing support and supply chain availability.

Compliance & Certifications: Both parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status, ensuring regulatory compatibility in automotive and industrial applications.

Functional Equivalence: Identical resistance value (324 kOhms), tolerance (±0.5%), power rating (0.05W), temperature coefficient (±200ppm/°C), and operating temperature range (-55°C ~ 155°C) ensure direct functional substitution without circuit redesign.

Physical Compatibility: Matching 0201 (0603 Metric) package dimensions and termination configuration enable direct board-level replacement without PCB layout modification.

For new designs and ongoing production, the RK73H1HTTCM3243D is the appropriate component selection. For existing designs currently using the RK73H1HTTC3243D, transition to the RK73H1HTTCM3243D is supported by full electrical and mechanical equivalence.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM3243D be used as a direct replacement for the RK73H1HTTC3243D in existing designs?

A: Yes. The RK73H1HTTCM3243D is electrically and mechanically equivalent to the RK73H1HTTC3243D. Both components share identical resistance (324 kOhms), tolerance (±0.5%), power rating (0.05W), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), package type (0201), and AEC-Q200 automotive qualification. Direct substitution is supported without circuit modification or re-qualification.

Q: Why is the RK73H1HTTC3243D marked "Not For New Designs"?

A: "Not For New Designs" status indicates the component has been superseded in the manufacturer's active product portfolio. The RK73H1HTTCM3243D is the active equivalent. For new designs, the RK73H1HTTCM3243D should be specified to ensure long-term supply availability and manufacturing support.

Q: Are there any differences in moisture sensitivity or environmental performance between these parts?

A: No. Both components maintain identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Both are REACH unaffected and ROHS3 compliant, with identical environmental performance specifications.

Q: What is the difference between the part numbers RK73H1HTTC3243D and RK73H1HTTCM3243D?

A: The part numbers differ only in the suffix designation (C vs. CM). This suffix change reflects the manufacturer's product line update. The "M" designation in RK73H1HTTCM3243D indicates the active, current production version. All electrical and mechanical specifications remain identical.

Q: Can these 0201 package resistors be used interchangeably with 0603 metric equivalents?

A: The 0201 package and 0603 metric designation refer to the same physical package size (0.60mm x 0.30mm). These designations are equivalent and interchangeable. Both the RK73H1HTTC3243D and RK73H1HTTCM3243D use this package standard.

Q: Are both parts suitable for automotive applications?

A: Yes. Both components carry AEC-Q200 automotive qualification, confirming suitability for automotive-grade applications. The thick film composition and moisture-resistant construction support automotive environmental requirements across the -55°C ~ 155°C operating temperature range.