RK73H1HTTC73R2D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC73R2D is a 73.2 Ohm ±0.5% chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 package (0603 Metric). This component features automotive-grade AEC-Q200 qualification with moisture-resistant thick film construction, designed for high-reliability applications in automotive and industrial environments.

The RK73H1HTTC73R2D carries a product status of "Not For New Designs," indicating that KOA Speer Electronics has transitioned this part to end-of-life status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support existing production requirements for applications currently utilizing this component.

Substiute Parts

RK73H1HTTC73R2D

KOA Speer Electronics, Inc.In Stock: 991RK73H1HTTC73R2D Datasheet

Current PartRFQ

RK73H1HTTCM73R2D

KOA Speer Electronics, Inc.In Stock: 920RK73H1HTTCM73R2D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC73R2D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 73.2 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 & Package Parameters:

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

Compliance & Certification 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 regulatory compliance to ensure functional and mechanical interchangeability without design modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM73R2D is the direct equivalent substitute for the RK73H1HTTC73R2D. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73H series, and maintain identical electrical, mechanical, and compliance specifications.

Key Differentiation:

The primary distinction between these parts is product lifecycle status. The RK73H1HTTC73R2D is designated "Not For New Designs," indicating end-of-life status, while the RK73H1HTTCM73R2D carries "Active" status, confirming ongoing production and long-term availability.

Substitution Basis:

• Both parts deliver 73.2 Ohms ±0.5% resistance with 0.05W power rating
• Both maintain ±200ppm/°C temperature coefficient across -55°C ~ 155°C operating range
• Both are packaged in 0201 (0603 Metric) form factor with identical physical dimensions
• Both hold AEC-Q200 automotive qualification and ROHS3 compliance
• Both feature MSL 1 (Unlimited) moisture sensitivity rating

The RK73H1HTTCM73R2D is suitable for direct replacement in existing designs and is the recommended selection for new production allocations, ensuring supply chain continuity and compliance with manufacturer lifecycle policies.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM73R2D be used as a direct drop-in replacement for the RK73H1HTTC73R2D?

A: Yes. Both components are electrically and mechanically identical. The RK73H1HTTCM73R2D provides direct substitution without design modification, PCB layout changes, or re-qualification requirements.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC73R2D?

A: This designation indicates that KOA Speer Electronics has transitioned the RK73H1HTTC73R2D to end-of-life status and is no longer recommending its use in new product development. The RK73H1HTTCM73R2D, with "Active" status, represents the current production equivalent and is the appropriate selection for ongoing and future applications.

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

A: No. Both components are supplied in 0201 (0603 Metric) package format with identical physical dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm). Both maintain MSL 1 (Unlimited) moisture sensitivity rating, requiring no special handling or storage modifications.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the RK73H1HTTC73R2D and RK73H1HTTCM73R2D carry AEC-Q200 automotive qualification and are ROHS3 compliant, suitable for automotive and industrial high-reliability applications.

Q: What is the tolerance specification for these resistors?

A: Both parts are specified at ±0.5% tolerance, ensuring precise resistance values within 0.366 Ohms of the nominal 73.2 Ohm specification.

Q: Are there any differences in temperature coefficient performance?

A: No. Both components maintain ±200ppm/°C temperature coefficient across the full -55°C ~ 155°C operating temperature range, ensuring stable performance across automotive thermal environments.