RK73H1HTTC1373D Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC1373D is a 137 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The RK73H1HTTC1373D carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's active product line. Identification of equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and transition to active production components where applicable.

Substiute Parts

RK73H1HTTC1373D

KOA Speer Electronics, Inc.In Stock: 1025RK73H1HTTC1373D Datasheet

Current PartRFQ

RK73H1HTTCM1373D

KOA Speer Electronics, Inc.In Stock: 791RK73H1HTTCM1373D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC1373D is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 137 kOhms
• Tolerance: ±0.5%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters:

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

Compliance & Certification:

• Automotive AEC-Q200 qualification
• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)

Substitute parts must match all electrical specifications, mechanical dimensions, and automotive certifications. Composition (thick film) and moisture-resistant construction are required attributes for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM1373D is the direct equivalent substitute for the RK73H1HTTC1373D. Both components are manufactured by KOA Speer Electronics, Inc., within the RK73H series, and share identical electrical, mechanical, and compliance specifications.

The primary distinction is product status: the RK73H1HTTC1373D is designated "Not For New Designs," while the RK73H1HTTCM1373D carries "Active" status. This indicates the RK73H1HTTCM1373D is the current production component and the recommended selection for new circuit designs and ongoing production requirements.

Both parts satisfy AEC-Q200 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1). Electrical performance, thermal characteristics, and mechanical compatibility are fully equivalent. Selection between these parts should be based on design phase requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM1373D be used as a direct replacement for the RK73H1HTTC1373D in existing designs?

A: Yes. The RK73H1HTTCM1373D is electrically and mechanically equivalent to the RK73H1HTTC1373D. All critical parameters—resistance, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and automotive certifications—are identical. Direct substitution is permissible without circuit redesign.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC1373D?

A: "Not For New Designs" indicates the component has been superseded in the manufacturer's active product line. While existing inventory remains available and functional, new circuit designs should specify the active equivalent, RK73H1HTTCM1373D, to ensure long-term supply continuity and access to current manufacturing support.

Q: Are there any differences in packaging or handling between these two parts?

A: Both components use identical 0201 (0603 Metric) package specifications with matching physical dimensions and termination configurations. Moisture sensitivity level (MSL 1 - Unlimited) is identical, requiring no changes to storage, handling, or assembly procedures.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the RK73H1HTTC1373D and RK73H1HTTCM1373D carry AEC-Q200 automotive qualification and are ROHS3 compliant. They are suitable for automotive applications requiring these certifications.

Q: What is the difference between the part numbers RK73H1HTTC1373D and RK73H1HTTCM1373D?

A: The part numbers differ only in the suffix designation (C versus CM). This suffix change reflects the manufacturer's product line update, with the RK73H1HTTCM1373D representing the current active production variant. The electrical and mechanical specifications remain unchanged.