Equivalent & Substitute Parts Reference: RK73H1HTTC4643F

Part Overview

The RK73H1HTTC4643F is a 464 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 (0603 Metric) package. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC4643F 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 support ongoing production requirements, field repairs, and legacy system maintenance where this resistor value and package specification remain functionally required.

Substiute Parts

RK73H1HTTC4643F

KOA Speer Electronics, Inc.In Stock: 1022RK73H1HTTC4643F Datasheet

Current PartRFQ

RK73H1HTTCM4643F

KOA Speer Electronics, Inc.In Stock: 1044RK73H1HTTCM4643F Datasheet

MFR RecommendedRFQ

AC0201FR-07464KL

YAGEOIn Stock: 916AC0201FR-07464KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC4643F are qualified based on strict electrical and mechanical parameter matching:

Electrical Parameters (Must Match Exactly):

• Resistance value: 464 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 or Exceed):

• AEC-Q200 automotive qualification
• RoHS3 compliance
• Moisture-resistant construction
• MSL 1 (Unlimited)

Substitute parts identified below meet all electrical, mechanical, and compliance requirements and are therefore functionally interchangeable in applications requiring the RK73H1HTTC4643F specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RK73H1HTTCM4643F (KOA Speer Electronics, Inc.)

The RK73H1HTTCM4643F is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc. This part maintains identical electrical specifications (464 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C) and mechanical package (0201 / 0603 Metric) as the original RK73H1HTTC4643F. The critical distinction is product status: RK73H1HTTCM4643F is Active, ensuring long-term availability and supply chain continuity. Both parts carry AEC-Q200 automotive qualification and ROHS3 compliance. The RK73H1HTTCM4643F does not explicitly specify moisture-resistant construction in the provided data, whereas the original part does; however, both meet MSL 1 (Unlimited) requirements. This substitute is recommended for applications where KOA Speer Electronics supply chain preference is established.

Secondary Substitute: AC0201FR-07464KL (YAGEO)

The AC0201FR-07464KL from YAGEO provides direct electrical and mechanical equivalence to the RK73H1HTTC4643F. This part matches all critical parameters: 464 kOhms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, 0201 package, AEC-Q200 qualification, ROHS3 compliance, and MSL 1 (Unlimited). The AC0201FR-07464KL explicitly specifies moisture-resistant construction, matching the original part's environmental protection. Product status is Active, supporting ongoing availability. This substitute is suitable for applications where multi-source component strategies or YAGEO supply chain relationships are preferred.

Both substitutes are qualified for direct replacement in automotive and industrial applications requiring the specified 464 kOhms ±1% 0.05W 0201 package resistor with AEC-Q200 certification.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM4643F be used as a direct replacement for RK73H1HTTC4643F?

A: Yes. The RK73H1HTTCM4643F is the manufacturer-recommended equivalent. Both parts share identical electrical specifications (464 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C), mechanical package (0201 / 0603 Metric), and automotive certifications (AEC-Q200, ROHS3). The primary advantage of RK73H1HTTCM4643F is Active product status, ensuring supply availability. Both parts meet MSL 1 (Unlimited) moisture sensitivity requirements.

Q: Is AC0201FR-07464KL from YAGEO compatible with the original KOA part?

A: Yes. The AC0201FR-07464KL meets all electrical and mechanical requirements for direct substitution. Resistance (464 kOhms ±1%), power rating (0.05W), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), package (0201), and automotive certifications (AEC-Q200, ROHS3) are identical. AC0201FR-07464KL explicitly specifies moisture-resistant construction, matching the original part's environmental protection. This part is suitable for applications requiring multi-source component qualification.

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

A: Substitution eligibility is determined by exact matching of: (1) Resistance value and tolerance (464 kOhms ±1%), (2) Power rating (0.05W / 1/20W), (3) Package / Case (0201 / 0603 Metric), (4) Temperature coefficient (±200ppm/°C), (5) Operating temperature range (-55°C ~ 155°C), (6) Composition (Thick Film), (7) Automotive rating (AEC-Q200), and (8) Compliance standards (ROHS3, MSL 1). All identified substitutes meet these criteria.

Q: Why is the original RK73H1HTTC4643F marked "Not For New Designs"?

A: "Not For New Designs" status indicates that KOA Speer Electronics has transitioned this part to end-of-life and recommends using the active equivalent RK73H1HTTCM4643F for new applications. Existing inventory of RK73H1HTTC4643F remains available for legacy system support and field repairs. For new designs, RK73H1HTTCM4643F or AC0201FR-07464KL are recommended.

Q: Are there differences in moisture resistance between the substitute parts?

A: The original RK73H1HTTC4643F and AC0201FR-07464KL both explicitly specify moisture-resistant construction. The RK73H1HTTCM4643F does not include explicit moisture-resistant specification in the provided data; however, all three parts meet MSL 1 (Unlimited) moisture sensitivity level requirements, indicating equivalent moisture handling capability for storage and assembly processes.

Q: Can these 0201 package resistors be used interchangeably on the same PCB assembly?

A: Yes. All identified substitutes share identical physical dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm) and height (0.010" max / 0.26mm max), with two terminations. They are mechanically and electrically interchangeable on PCB assemblies designed for the 0201 (0603 Metric) package. No PCB layout modifications are required.

Q: What is the significance of AEC-Q200 certification for these resistors?

A: AEC-Q200 is the automotive industry standard qualification for passive components, including resistors. All identified parts (RK73H1HTTC4643F, RK73H1HTTCM4643F, and AC0201FR-07464KL) carry AEC-Q200 certification, confirming suitability for automotive applications requiring reliability, temperature stability, and environmental performance standards. This certification is mandatory for automotive OEM and Tier 1 supplier applications.