RK73H1HTTC3572F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC3572F is a 35.7 kOhms ±1% thick film chip resistor in 0201 package (0603 Metric) rated for 0.05W power dissipation. 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 The part is classified as "Not For New Designs," indicating it has been superseded.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 ongoing production support, maintenance applications, and design transitions to active product lines.

Substiute Parts

RK73H1HTTC3572F

KOA Speer Electronics, Inc.In Stock: 20834RK73H1HTTC3572F Datasheet

Current PartRFQ

RK73H1HTTCM3572F

KOA Speer Electronics, Inc.In Stock: 875RK73H1HTTCM3572F Datasheet

MFR RecommendedRFQ

AC0201FR-0735K7L

YAGEOIn Stock: 913AC0201FR-0735K7L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC3572F is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 35.7 kOhms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Package: 0201 (0603 Metric)
• Composition: Thick Film
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C
• Automotive qualification: AEC-Q200
• Moisture resistance: Required
• RoHS compliance: ROHS3
• MSL rating: 1 (Unlimited)

All identified substitute parts meet these criteria without exception. Substitutes are grouped by manufacturer and product status to facilitate procurement decisions.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs): RK73H1HTTCM3572F from KOA Speer Electronics, Inc. is the manufacturer-recommended upgrade path. This part maintains identical electrical and mechanical specifications while carrying Active product status. It is suitable for new design implementations and provides continuity within the KOA RK73H series.

Alternative Substitute (Cross-Manufacturer): AC0201FR-0735K7L from YAGEO provides full electrical and mechanical equivalence with Active product status. This part is appropriate for applications where cross-manufacturer sourcing is acceptable and offers independent supply chain diversification.

Legacy Support: RK73H1HTTC3572F remains available in inventory (20,750 units) for ongoing production support of existing designs. However, transition to an Active product line is recommended for long-term sustainability.

All three parts carry identical compliance certifications (AEC-Q200, ROHS3, REACH Unaffected, EAR99) and are suitable for automotive applications requiring moisture-resistant thick film resistors in 0201 package format.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM3572F be used as a direct replacement for RK73H1HTTC3572F? A: Yes. Both parts are electrically and mechanically identical with matching resistance (35.7 kOhms ±1%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and automotive qualifications (AEC-Q200). The primary difference is product status: RK73H1HTTCM3572F is Active while RK73H1HTTC3572F is Not For New Designs.

Q: What is the difference between RK73H1HTTC3572F and AC0201FR-0735K7L? A: Both parts meet identical electrical specifications (35.7 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C) and package requirements (0201). The difference is manufacturer: KOA Speer Electronics versus YAGEO. Both carry AEC-Q200 qualification, ROHS3 compliance, and Active product status. Selection between them depends on supply chain preferences and procurement agreements.

Q: Are all substitute parts suitable for automotive applications? A: Yes. All listed substitute parts carry AEC-Q200 automotive qualification, moisture-resistant construction, and operate across the full -55°C ~ 155°C temperature range required for automotive use.

Q: What does "Not For New Designs" mean for RK73H1HTTC3572F? A: This designation indicates the part has been superseded by newer product lines. While available for existing production and maintenance, it should not be selected for new circuit designs. RK73H1HTTCM3572F or AC0201FR-0735K7L are recommended for new implementations.

Q: Can these parts be used interchangeably in the same PCB assembly? A: Yes. All substitute 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), ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What is the MSL rating and why does it matter? A: All parts carry MSL 1 (Unlimited), indicating unlimited shelf life without moisture bake-out requirements. This simplifies inventory management and reduces handling constraints during storage and assembly.