Equivalent & Substitute Parts for RK73G1HTTC3903F

Part Overview

The RK73G1HTTC3903F is a 390 kOhms ±1% thick film chip resistor in 0201 package (0603 metric) rated for 0.05W power dissipation. This component is manufactured by KOA Speer Electronics, Inc. and meets automotive AEC-Q200 qualification standards. The part is currently classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line.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 status where applicable.

Substiute Parts

RK73G1HTTC3903F

KOA Speer Electronics, Inc.In Stock: 839RK73G1HTTC3903F Datasheet

Current PartRFQ

RK73G1HTTCM3903F

KOA Speer Electronics, Inc.In Stock: 777RK73G1HTTCM3903F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC3903F is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 390 kOhms (exact match required)
• Tolerance: ±1% (equal or tighter tolerance acceptable)
• Power rating: 0.05W minimum (equal or higher acceptable)
• Package: 0201 (0603 Metric) (exact match required for PCB compatibility)
• Composition: Thick Film (determines electrical characteristics)
• Temperature coefficient: ±50ppm/°C (exact match required for stability)
• Operating temperature range: -55°C ~ 155°C (must encompass or exceed)
• Automotive rating: AEC-Q200 (required for automotive applications)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

The substitute part RK73G1HTTCM3903F meets all mandatory matching parameters and represents the manufacturer's recommended equivalent. The primary distinction is product status: the main part is classified as "Not For New Designs" while the substitute is "Active," indicating current production and recommended for new designs.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: Use RK73G1HTTCM3903F. This part carries "Active" product status, indicating current manufacturing support and recommended use in new circuit designs. It maintains full electrical and mechanical equivalence to the main part while providing supply chain continuity.

For Existing Designs Using RK73G1HTTC3903F: Direct substitution with RK73G1HTTCM3903F is permissible without circuit redesign. All electrical parameters, package dimensions, and automotive qualifications are identical. The substitute part is manufactured by the same supplier within the same product series.

Compliance Considerations: Both parts maintain ROHS3 compliance and AEC-Q200 automotive qualification. No additional validation is required for regulatory or environmental standards when transitioning between these parts.

Supply Chain Strategy: Given that RK73G1HTTC3903F is classified as "Not For New Designs," procurement should transition to RK73G1HTTCM3903F for long-term availability assurance. Both parts currently maintain adequate inventory levels.

Frequently Asked Questions (FAQ)

Q: Can RK73G1HTTCM3903F be used as a direct replacement for RK73G1HTTC3903F in existing assemblies?

A: Yes. All electrical specifications, mechanical dimensions, and automotive qualifications are identical. No circuit modifications or PCB layout changes are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product lifecycle status. RK73G1HTTC3903F is "Not For New Designs," while RK73G1HTTCM3903F is "Active." The electrical and physical characteristics are equivalent.

Q: Are both parts suitable for automotive applications?

A: Yes. Both parts carry AEC-Q200 automotive qualification and operate across the -55°C to 155°C temperature range required for automotive environments.

Q: Does the 0201 package dimension match standard PCB footprints?

A: Yes. The 0201 package (0603 metric equivalent) measures 0.024" L x 0.012" W with a maximum seated height of 0.010". This is a standard footprint dimension compatible with automated assembly equipment.

Q: What is the significance of the ±50ppm/°C temperature coefficient?

A: This specification defines the resistance value stability across the operating temperature range. Both parts maintain this identical coefficient, ensuring equivalent circuit performance across temperature variations.

Q: Are there any moisture sensitivity concerns with these parts?

A: No. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices apply.

Q: Can these parts be used in non-automotive applications?

A: Yes. While qualified for automotive use, these parts are suitable for general industrial and commercial applications within the specified operating parameters.