Equivalent & Substitute Parts for RK73H1HTTC3602F

Part Overview

The RK73H1HTTC3602F is a 36 kOhm ±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 designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC3602F carries a "Not For New Designs" product status, indicating that KOA Speer Electronics has transitioned this part to end-of-life. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support existing production requirements for applications currently utilizing this component.

Substiute Parts

RK73H1HTTC3602F

KOA Speer Electronics, Inc.In Stock: 1024RK73H1HTTC3602F Datasheet

Current PartRFQ

RK73H1HTTCM3602F

KOA Speer Electronics, Inc.In Stock: 907RK73H1HTTCM3602F Datasheet

MFR RecommendedRFQ

AC0201FR-0736KL

YAGEOIn Stock: 6869AC0201FR-0736KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC3602F are qualified based on strict electrical and mechanical parameter matching:

Electrical Parameters (Must Match Exactly):

• Resistance value: 36 kOhms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical Parameters (Must Match Exactly):

• Package / Case: 0201 (0603 Metric)
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
• Height - Seated (Max): 0.010" (0.26mm)
• Number of terminations: 2

Compliance & Certification (Must Match):

• Automotive AEC-Q200 qualification
• Moisture-resistant thick film construction
• RoHS3 compliance
• MSL 1 (Unlimited)

Substitute parts must satisfy all three parameter categories to ensure functional and mechanical interchangeability without design modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RK73H1HTTCM3602F (KOA Speer Electronics, Inc.)

The RK73H1HTTCM3602F is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc. This part maintains identical electrical specifications, mechanical dimensions, and automotive compliance certifications as the RK73H1HTTC3602F. The primary distinction is active product status, indicating ongoing manufacturing and supply availability. This part is the preferred choice for direct replacement in existing designs and production environments.

Secondary Substitute: AC0201FR-0736KL (YAGEO)

The AC0201FR-0736KL from YAGEO provides full electrical and mechanical compatibility with the RK73H1HTTC3602F. All critical parameters—resistance value, tolerance, power rating, temperature coefficient, operating temperature range, package dimensions, and AEC-Q200 automotive qualification—are identical. YAGEO's AC series thick film resistor meets the same RoHS3 compliance and MSL 1 requirements. This part offers superior inventory availability (6770 Pcs) and represents an alternative source for supply chain diversification.

Both substitute parts are qualified for direct replacement without circuit redesign or re-qualification testing, provided that the original design specifications do not include manufacturer-specific performance characteristics beyond the stated electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q1: Can RK73H1HTTCM3602F be used as a direct replacement for RK73H1HTTC3602F?

A: Yes. The RK73H1HTTCM3602F is electrically and mechanically identical to the RK73H1HTTC3602F. Both parts share the same resistance value (36 kOhms), tolerance (±1%), power rating (0.05W), package dimensions (0201), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and AEC-Q200 automotive certification. The primary difference is product status: RK73H1HTTCM3602F is active, while RK73H1HTTC3602F is not for new designs.

Q2: Is AC0201FR-0736KL from YAGEO compatible with designs using RK73H1HTTC3602F?

A: Yes. The AC0201FR-0736KL meets all electrical and mechanical specifications required for substitution. Resistance, tolerance, power rating, package type, temperature coefficient, operating temperature range, and AEC-Q200 automotive qualification are identical. Both parts are RoHS3 compliant with MSL 1 rating. No design modification is required for this substitution.

Q3: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by three parameter categories: (1) Electrical parameters—resistance value, tolerance, power rating, and temperature coefficient must match exactly; (2) Mechanical parameters—package type, physical dimensions, and termination count must match exactly; (3) Compliance parameters—AEC-Q200 automotive rating, moisture resistance, RoHS3 compliance, and MSL rating must match exactly. All three categories must be satisfied for direct substitution.

Q4: Does packaging format (Tape & Reel vs. other formats) affect substitution?

A: Packaging format does not affect electrical or mechanical interchangeability. Both RK73H1HTTC3602F and AC0201FR-0736KL are supplied in Tape & Reel (TR) format, which is standard for automated assembly. The RK73H1HTTCM3602F packaging format is not specified in available data. Packaging format selection depends on manufacturing process requirements and does not impact component performance or compatibility.

Q5: Why is RK73H1HTTC3602F marked "Not For New Designs"?

A: "Not For New Designs" status indicates that KOA Speer Electronics has discontinued active development and promotion of this part number. Existing inventory remains available for current production support, but the manufacturer recommends using active alternatives for new design projects. The RK73H1HTTCM3602F serves as the active replacement within the KOA Speer product line.

Q6: What is the difference between RK73H1HTTC3602F and RK73H1HTTCM3602F part numbers?

A: The part numbers differ by a single character: "RK73H1HTTC3602F" versus "RK73H1HTTCM3602F." This designation change reflects a product line update by KOA Speer Electronics. The "M" designation in the newer part number indicates active product status. All electrical, mechanical, and compliance specifications remain identical between the two parts.

Q7: Are there inventory or lead time considerations when selecting between substitute parts?

A: Yes. Inventory availability differs significantly: RK73H1HTTC3602F has 998 Pcs in stock, RK73H1HTTCM3602F has 865 Pcs, and AC0201FR-0736KL has 6770 Pcs. For applications requiring immediate availability or high-volume procurement, AC0201FR-0736KL from YAGEO offers substantially greater inventory depth. For designs preferring single-manufacturer sourcing, RK73H1HTTCM3602F maintains KOA Speer supply continuity.