Equivalent & Substitute Parts for RK73H1HTTC39R2F

Part Overview

The RK73H1HTTC39R2F is a 39.2 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., designed for 0.05W (1/20W) applications in 0201 (0603 Metric) package format. This component is rated for automotive applications under AEC-Q200 standard with moisture-resistant construction and operates across -55°C to 155°C temperature range.

The RK73H1HTTC39R2F carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's active product line. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and transition to actively supported alternatives where applicable.

Substiute Parts

RK73H1HTTC39R2F

KOA Speer Electronics, Inc.In Stock: 15592RK73H1HTTC39R2F Datasheet

Current PartRFQ

RK73H1HTTCM39R2F

KOA Speer Electronics, Inc.In Stock: 736RK73H1HTTCM39R2F Datasheet

MFR RecommendedRFQ

AC0201FR-0739R2L

YAGEOIn Stock: 995AC0201FR-0739R2L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC39R2F are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 39.2 Ohms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Package format: 0201 (0603 Metric)
• Composition: Thick Film
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive compliance: AEC-Q200
• Moisture resistance: Required
• RoHS compliance: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1

All substitute parts listed maintain identical electrical specifications and physical dimensions. Substitution is valid when all parameters match within the specified tolerances and certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Manufacturer Recommended): RK73H1HTTCM39R2F from KOA Speer Electronics is the manufacturer-recommended upgrade path. This part maintains identical electrical and mechanical specifications while carrying Active product status. Selection of this part ensures continued support from the original manufacturer and maintains design consistency within the KOA product family.

Cross-Manufacturer Substitute: AC0201FR-0739R2L from YAGEO provides a functionally equivalent alternative with Active product status. This part matches all critical electrical parameters, package dimensions, and automotive certifications. Cross-manufacturer substitution is appropriate when supply chain diversification or cost optimization is required.

Compliance Considerations: All three parts maintain ROHS3 compliance and AEC-Q200 automotive qualification. The RK73H1HTTCM39R2F does not explicitly specify moisture resistance in the provided data, whereas both the original RK73H1HTTC39R2F and AC0201FR-0739R2L confirm moisture-resistant construction. For applications requiring moisture resistance as a critical parameter, AC0201FR-0739R2L or continued use of RK73H1HTTC39R2F is appropriate.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM39R2F directly replace RK73H1HTTC39R2F in existing designs?

A: Yes. Both parts share identical resistance (39.2 Ohms), tolerance (±1%), power rating (0.05W), package format (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 certification. The primary difference is product status: RK73H1HTTCM39R2F is Active while RK73H1HTTC39R2F is Not For New Designs. Direct substitution is electrically and mechanically valid.

Q: What is the difference between KOA and YAGEO versions?

A: Both manufacturers provide 39.2 Ohm ±1% 0201 thick film resistors with identical electrical performance and automotive qualification. The primary differences are manufacturer identity and supply chain. YAGEO AC0201FR-0739R2L is cross-manufacturer equivalent suitable for applications requiring supplier diversification.

Q: Is moisture resistance a critical parameter for substitution?

A: Moisture resistance is specified for RK73H1HTTC39R2F and AC0201FR-0739R2L but not explicitly stated for RK73H1HTTCM39R2F in the provided data. If moisture resistance is a design requirement, verify RK73H1HTTCM39R2F specifications with KOA or select AC0201FR-0739R2L, which explicitly confirms moisture-resistant construction.

Q: Are all three parts suitable for new automotive designs?

A: RK73H1HTTCM39R2F and AC0201FR-0739R2L both carry Active product status and are suitable for new designs. RK73H1HTTC39R2F is marked Not For New Designs and should be used only for legacy design maintenance or existing production continuity.

Q: Do package dimensions differ between these parts?

A: No. All three parts use identical 0201 (0603 Metric) package format with dimensions 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). Physical interchangeability is confirmed.

Q: What is the MSL rating and why does it matter?

A: All three parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture absorption concerns. This simplifies inventory management and eliminates bake-out requirements prior to assembly.