RK73G1HTTC3902F Equivalent & Substitute Parts

Part Overview

The RK73G1HTTC3902F is a 39 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 RK73G1HTTC3902F carries a product status designation of "Not For New Designs," indicating that while the part remains available in inventory, KOA Speer Electronics has transitioned this model to legacy status. For new design implementations and ongoing production requirements, identification of active equivalent parts is necessary to ensure long-term supply chain continuity and access to manufacturer support.

Substiute Parts

RK73G1HTTC3902F

KOA Speer Electronics, Inc.In Stock: 1089RK73G1HTTC3902F Datasheet

Current PartRFQ

RK73G1HTTCM3902F

KOA Speer Electronics, Inc.In Stock: 1069RK73G1HTTCM3902F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC3902F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 39 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 / Case: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)

Compliance & Certification:

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

Substitute parts must satisfy all electrical, mechanical, and compliance criteria listed above. Parts from the same manufacturer series (RK73G) that maintain identical specifications across these parameters are classified as direct equivalents.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM3902F is the direct equivalent substitute for the RK73G1HTTC3902F. Both parts are manufactured by KOA Speer Electronics, Inc., within the RK73G series, and maintain identical electrical specifications, mechanical dimensions, and compliance certifications.

The primary distinction between these parts is product lifecycle status. The RK73G1HTTC3902F is designated "Not For New Designs," while the RK73G1HTTCM3902F carries an "Active" status designation. This indicates that KOA Speer Electronics continues to manufacture, support, and maintain supply availability for the RK73G1HTTCM3902F.

For new circuit designs, production ramp-up, and long-term supply chain planning, the RK73G1HTTCM3902F is the appropriate selection. Both parts satisfy automotive AEC-Q200 qualification requirements and maintain ROHS3 compliance, ensuring compatibility with automotive and industrial applications requiring regulatory conformance.

The electrical and mechanical interchangeability of these parts is complete. No circuit redesign, layout modification, or application re-qualification is required when transitioning from the RK73G1HTTC3902F to the RK73G1HTTCM3902F.

Frequently Asked Questions (FAQ)

Q: Can the RK73G1HTTCM3902F be used as a direct replacement for the RK73G1HTTC3902F in existing designs?

A: Yes. The RK73G1HTTCM3902F is electrically and mechanically identical to the RK73G1HTTC3902F. All electrical parameters (resistance, tolerance, power rating, temperature coefficient), mechanical dimensions (0201 package), and compliance certifications (AEC-Q200, ROHS3) are equivalent. Direct substitution requires no circuit modification or re-qualification.

Q: What does "Not For New Designs" mean for the RK73G1HTTC3902F?

A: This designation indicates that KOA Speer Electronics has transitioned the RK73G1HTTC3902F to legacy status and recommends that new circuit designs utilize the active equivalent, RK73G1HTTCM3902F. Existing inventory of the RK73G1HTTC3902F remains available, but manufacturer support and long-term supply continuity are prioritized for active part numbers.

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

A: No. Both the RK73G1HTTC3902F and RK73G1HTTCM3902F are supplied in 0201 (0603 Metric) surface mount packages with Moisture Sensitivity Level 1 (Unlimited). Handling, storage, and reflow requirements are identical.

Q: Do both parts meet automotive AEC-Q200 qualification?

A: Yes. Both the RK73G1HTTC3902F and RK73G1HTTCM3902F are qualified to the automotive AEC-Q200 standard and are suitable for automotive applications requiring this certification.

Q: What is the temperature operating range for these resistors?

A: Both parts operate across the temperature range of -55°C to 155°C with a temperature coefficient of ±50ppm/°C, ensuring stable performance across automotive and industrial temperature extremes.