Equivalent & Substitute Parts for RK73H1HTTC39R0F

Part Overview

The RK73H1HTTC39R0F is a 39 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 package (0.60mm x 0.30mm metric). This component is designed for automotive applications with AEC-Q200 qualification and moisture-resistant construction. The part is classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

RK73H1HTTC39R0F

KOA Speer Electronics, Inc.In Stock: 238595RK73H1HTTC39R0F Datasheet

Current PartRFQ

RK73H1HTTCM39R0F

KOA Speer Electronics, Inc.In Stock: 795RK73H1HTTCM39R0F Datasheet

MFR RecommendedRFQ

AC0201FR-0739RL

YAGEOIn Stock: 11096AC0201FR-0739RL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC39R0F are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Resistance value: 39 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)
• Automotive qualification: AEC-Q200 (exact match required)
• Moisture resistance: Yes (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

All substitute parts listed below meet these criteria without exception. Substitution is based solely on parameter equivalence, not on performance assumptions or design recommendations.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM39R0F (KOA Speer Electronics, Inc.) - MFR Recommended Substitute:

This part is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc. It maintains active product status and meets all electrical and mechanical specifications of the original RK73H1HTTC39R0F. The primary distinction is product status: while the original part is classified as "Not For New Designs," this variant is actively supported. Selection of this part is appropriate for design continuity and long-term supply assurance. All compliance certifications (ROHS3, AEC-Q200, MSL 1) are maintained.

AC0201FR-0739RL (YAGEO) - Direct Cross-Reference Substitute:

This YAGEO part provides direct electrical and mechanical equivalence to the RK73H1HTTC39R0F. It is an active product with full AEC-Q200 automotive qualification, moisture-resistant construction, and ROHS3 compliance. The AC0201FR-0739RL is suitable for applications requiring cross-manufacturer sourcing flexibility. Inventory availability is higher than the KOA alternatives, supporting supply chain resilience.

Both substitute parts are qualified for automotive applications and maintain identical electrical performance parameters, package dimensions, and environmental ratings as the original component.

Frequently Asked Questions (FAQ)

Q1: Can the RK73H1HTTCM39R0F replace the RK73H1HTTC39R0F in existing designs?

A: Yes. Both parts are manufactured by KOA Speer Electronics, Inc., and meet identical electrical specifications (39 Ohms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C). The primary difference is product status: the original is "Not For New Designs," while the substitute is "Active." All compliance certifications and package dimensions are equivalent.

Q2: Is the YAGEO AC0201FR-0739RL compatible with the original KOA part?

A: Yes. The AC0201FR-0739RL meets all electrical and mechanical parameters of the RK73H1HTTC39R0F. Both parts are 0201 package, 39 Ohm ±1%, 0.05W thick film resistors with AEC-Q200 qualification, ±200ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. Cross-manufacturer substitution is electrically and mechanically valid.

Q3: What is the significance of "Not For New Designs" status?

A: This designation indicates the RK73H1HTTC39R0F has been superseded and is no longer recommended for new product development. However, it remains functionally equivalent to active alternatives. For ongoing production or design updates, selection of an active substitute part (RK73H1HTTCM39R0F or AC0201FR-0739RL) is recommended for long-term supply continuity.

Q4: Are all three parts suitable for automotive applications?

A: Yes. All three parts carry AEC-Q200 automotive qualification, moisture-resistant construction, and operate across the -55°C ~ 155°C temperature range. They are suitable for automotive circuit applications requiring these specifications.

Q5: What is the difference in moisture resistance between the KOA variants?

A: The RK73H1HTTC39R0F and AC0201FR-0739RL are explicitly specified as moisture-resistant. The RK73H1HTTCM39R0F does not include moisture resistance in its specification. For applications requiring moisture-resistant construction, the RK73H1HTTC39R0F or AC0201FR-0739RL are appropriate selections.

Q6: Can these parts be used interchangeably in PCB assembly?

A: Yes. All three parts share identical 0201 package dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and maximum seated height (0.010" / 0.26mm). They are mechanically interchangeable in PCB assembly processes without modification to footprints or placement parameters.

Q7: What compliance certifications apply to all substitute parts?

A: All three parts are ROHS3 compliant, AEC-Q200 qualified, and carry Moisture Sensitivity Level 1 (Unlimited). REACH status is "Unaffected" for all parts. ECCN classification is EAR99 for all parts.