Equivalent & Substitute Parts for RK73H1HTTC45R3F

Part Overview

The RK73H1HTTC45R3F is a 45.3 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., designed for 0.05W (1/20W) applications in the 0201 (0603 Metric) package format. This component is rated for automotive applications under AEC-Q200 and features moisture-resistant construction with an operating temperature range of -55°C to 155°C.

The RK73H1HTTC45R3F carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active production status where applicable.

Substiute Parts

RK73H1HTTC45R3F

KOA Speer Electronics, Inc.In Stock: 852RK73H1HTTC45R3F Datasheet

Current PartRFQ

RK73H1HTTCM45R3F

KOA Speer Electronics, Inc.In Stock: 705RK73H1HTTCM45R3F Datasheet

MFR RecommendedRFQ

AC0201FR-0745R3L

YAGEOIn Stock: 901AC0201FR-0745R3L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC45R3F are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 45.3 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 to 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, ensuring direct functional equivalence in circuit applications. Substitutes are differentiated by manufacturer identity and product status (active vs. obsolete).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Manufacturer Recommended): RK73H1HTTCM45R3F from KOA Speer Electronics is the manufacturer-recommended equivalent. This part maintains all electrical and mechanical specifications of the original RK73H1HTTC45R3F while carrying an Active product status. Selection of this part ensures continued support from the original manufacturer and maintains design consistency within the KOA product ecosystem.

Alternative Substitute (Cross-Manufacturer): AC0201FR-0745R3L from YAGEO provides functional equivalence across all critical parameters, including moisture resistance and AEC-Q200 automotive compliance. This part is suitable for applications requiring cross-manufacturer sourcing flexibility or where YAGEO supply chain availability is preferred. Both the KOA and YAGEO substitutes are currently in active production.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with modern manufacturing processes and storage requirements. The automotive AEC-Q200 rating is preserved across all substitutes, supporting use in automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM45R3F be used as a direct replacement for RK73H1HTTC45R3F?

A: Yes. RK73H1HTTCM45R3F is the manufacturer-recommended equivalent and maintains identical electrical specifications (45.3 Ohms ±1%, 0.05W), physical dimensions (0201 package), temperature performance (±200ppm/°C, -55°C to 155°C), and automotive compliance (AEC-Q200). The primary difference is product status: RK73H1HTTCM45R3F is Active, while RK73H1HTTC45R3F is Not For New Designs.

Q: What is the difference between RK73H1HTTC45R3F and RK73H1HTTCM45R3F?

A: Both parts are manufactured by KOA Speer Electronics with identical electrical and mechanical specifications. The "M" designation in RK73H1HTTCM45R3F indicates a variant with Active product status. The original RK73H1HTTC45R3F is marked Not For New Designs. The RK73H1HTTCM45R3F does not list moisture resistance in its feature set, while the original does.

Q: Is AC0201FR-0745R3L from YAGEO compatible with designs using RK73H1HTTC45R3F?

A: Yes. AC0201FR-0745R3L meets all electrical and mechanical requirements: 45.3 Ohms ±1%, 0.05W power rating, 0201 package, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, AEC-Q200 automotive rating, and moisture resistance. This part is suitable for direct substitution in circuit applications.

Q: Are all substitute parts available in the same packaging format?

A: RK73H1HTTC45R3F and AC0201FR-0745R3L are both supplied in Tape & Reel (TR) packaging. RK73H1HTTCM45R3F packaging information is not specified in available data. All three parts use the 0201 (0603 Metric) component package format.

Q: Do all substitute parts meet automotive standards?

A: Yes. All three parts carry AEC-Q200 automotive qualification, supporting use in automotive and high-reliability applications with equivalent performance and compliance.

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

A: This designation indicates that RK73H1HTTC45R3F has been superseded in the manufacturer's product line. While existing inventory remains available, KOA Speer Electronics recommends using RK73H1HTTCM45R3F for new designs to ensure long-term supply continuity and manufacturer support.