RK73G1HTTC3603F Equivalent & Substitute Parts

Part Overview

The RK73G1HTTC3603F is a 360 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated for 0.05W (1/20W) power dissipation in a 0201 (0603 Metric) surface mount package. This component is qualified to the automotive AEC-Q200 standard and operates across the temperature range of -55°C to 155°C.

The RK73G1HTTC3603F carries a product status designation of "Not For New Designs," indicating that while the part remains available in inventory (799 pieces), it has been superseded in the manufacturer's active product line. Identifying equivalent substitute parts is necessary for design continuity, long-term supply chain planning, and transition to actively supported alternatives that maintain identical electrical and mechanical specifications.

Substiute Parts

RK73G1HTTC3603F

KOA Speer Electronics, Inc.In Stock: 891RK73G1HTTC3603F Datasheet

Current PartRFQ

RK73G1HTTCM3603F

KOA Speer Electronics, Inc.In Stock: 991RK73G1HTTCM3603F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC3603F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 360 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match or wider range acceptable)

Mechanical Parameters:

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

Compliance & Certification:

• Automotive AEC-Q200 qualification (required for automotive applications)
• RoHS3 compliance (required for regulatory adherence)
• Moisture Sensitivity Level MSL 1 (exact match required)

Substitute parts must satisfy all electrical, mechanical, and compliance criteria simultaneously. Product status (Active vs. Not For New Designs) does not affect substitution eligibility but indicates supply chain availability and manufacturer support.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM3603F is a direct electrical and mechanical equivalent to the RK73G1HTTC3603F. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73G series, and satisfy identical specifications across all critical parameters: 360 kOhms ±1% resistance, 0.05W power rating, 0201 package, ±50ppm/°C temperature coefficient, and -55°C to 155°C operating range.

The primary distinction between these parts is product lifecycle status. The RK73G1HTTCM3603F carries an "Active" designation, indicating ongoing manufacturer support, continued production, and long-term supply chain availability. The RK73G1HTTC3603F is marked "Not For New Designs," signifying that while current inventory exists (799 pieces), the manufacturer has transitioned this part number out of active development.

Both parts maintain identical AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 moisture sensitivity rating, ensuring regulatory and environmental adherence in automotive and industrial applications.

For new circuit designs, procurement of long-term supply contracts, or applications requiring extended component lifecycle support, the RK73G1HTTCM3603F is the recommended selection. For existing designs currently utilizing the RK73G1HTTC3603F, direct substitution with the RK73G1HTTCM3603F requires no circuit modifications, PCB layout changes, or functional re-qualification, as all electrical and mechanical parameters remain identical.

Frequently Asked Questions (FAQ)

Q: Can the RK73G1HTTCM3603F be used as a direct replacement for the RK73G1HTTC3603F in existing designs?

A: Yes. The RK73G1HTTCM3603F is a direct substitute. All electrical parameters (360 kOhms ±1%, 0.05W, ±50ppm/°C), mechanical dimensions (0201 package, 0.024" x 0.012"), and compliance certifications (AEC-Q200, ROHS3, MSL 1) are identical. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the "Not For New Designs" status on the RK73G1HTTC3603F?

A: This designation indicates that the manufacturer has discontinued active development and production of this specific part number. While existing inventory remains available, the part is no longer recommended for new circuit designs. The RK73G1HTTCM3603F is the active equivalent and should be specified for new applications.

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

A: The main part (RK73G1HTTC3603F) is specified as Tape & Reel (TR) packaging. The substitute part (RK73G1HTTCM3603F) does not have packaging specification provided in the available data. Both parts use the 0201 (0603 Metric) package format. Confirm packaging requirements with the supplier if tape specifications are critical for your assembly process.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the RK73G1HTTC3603F and RK73G1HTTCM3603F are qualified to the AEC-Q200 automotive standard, suitable for automotive and high-reliability applications operating across -55°C to 155°C.

Q: What is the difference in current inventory levels?

A: The RK73G1HTTC3603F has 799 pieces in stock. The RK73G1HTTCM3603F has 884 pieces in stock. The substitute part has marginally higher current availability.

Q: Are both parts RoHS compliant?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Yes. Both parts operate across the identical temperature range of -55°C to 155°C with a temperature coefficient of ±50ppm/°C. They are functionally equivalent in all temperature-dependent performance characteristics.