RK73G1HTTC3901F Equivalent & Substitute Parts

Part Overview

The RK73G1HTTC3901F is a 3.9 kOhms ±1% 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. The part is currently classified as "Not For New Designs," which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for ongoing production and maintenance applications.

Substiute Parts

RK73G1HTTC3901F

KOA Speer Electronics, Inc.In Stock: 857RK73G1HTTC3901F Datasheet

Current PartRFQ

RK73G1HTTCM3901F

KOA Speer Electronics, Inc.In Stock: 785RK73G1HTTCM3901F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73G1HTTC3901F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 3.9 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 ~ 155°C (exact match required)

Mechanical Parameters:

• Package / Case: 0201 (0603 Metric) (exact match required)
• Physical dimensions: 0.024" L x 0.012" W / 0.60mm x 0.30mm (exact match required)
• Height - Seated (Max): 0.010" (0.26mm) (exact match required)

Compliance & Certification:

• Composition: Thick Film (exact match required)
• 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 satisfy all parameters listed above without deviation. The primary distinction between the main part and its substitute is product status classification.

Parameter Comparison

Engineering Selection Recommendations

The RK73G1HTTCM3901F is the manufacturer-recommended substitute for the RK73G1HTTC3901F. Both components are manufactured by KOA Speer Electronics, Inc., and maintain identical electrical, mechanical, and compliance specifications. The primary distinction is product lifecycle status: the original part is classified as "Not For New Designs," while the substitute is designated as "Active."

For new design implementations, the RK73G1HTTCM3901F should be selected. For existing applications currently using the RK73G1HTTC3901F, the substitute provides direct functional equivalence with no circuit redesign or validation required, provided that the component is sourced from the same manufacturer and meets all specified certifications.

Both parts satisfy AEC-Q200 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1), making them suitable for automotive and industrial applications operating across the -55°C to 155°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can the RK73G1HTTCM3901F be used as a direct replacement for the RK73G1HTTC3901F?

A: Yes. Both components are electrically and mechanically identical, with matching resistance (3.9 kOhms ±1%), power rating (0.05W), package (0201), temperature coefficient (±50ppm/°C), operating range (-55°C ~ 155°C), and automotive certification (AEC-Q200). The substitute is the manufacturer-recommended active alternative.

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

A: This designation indicates that the RK73G1HTTC3901F has been superseded in the manufacturer's product lifecycle. New designs should utilize the RK73G1HTTCM3901F, which carries "Active" status and ensures long-term availability and support.

Q: Are there any differences in package or physical dimensions between these parts?

A: No. Both components use the 0201 (0603 Metric) package with identical dimensions of 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). They are mechanically interchangeable.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RK73G1HTTC3901F and RK73G1HTTCM3901F are ROHS3 compliant, AEC-Q200 qualified, and carry MSL 1 (Unlimited) moisture sensitivity rating. They satisfy identical automotive and environmental requirements.

Q: What is the difference between the part numbers RK73G1HTTC3901F and RK73G1HTTCM3901F?

A: The part numbers differ only in the suffix designation (C versus CM). This variation reflects the manufacturer's internal product coding and lifecycle management. The "M" designation in the substitute part number indicates the active manufacturing variant. All other specifications remain identical.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The components are pin-compatible, dimensionally identical, and electrically equivalent. No PCB layout modifications or design changes are required for substitution.