RK73H1HTTC51R0F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC51R0F is a 51 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 package (0603 Metric). This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC51R0F carries a "Not For New Designs" product status. Identifying equivalent and substitute parts is necessary to support existing designs, legacy systems, and applications where this component remains in active use or where inventory replenishment is required.

Substiute Parts

RK73H1HTTC51R0F

KOA Speer Electronics, Inc.In Stock: 31727RK73H1HTTC51R0F Datasheet

Current PartRFQ

RK73H1HTTCM51R0F

KOA Speer Electronics, Inc.In Stock: 1163RK73H1HTTCM51R0F Datasheet

MFR RecommendedRFQ

AC0201FR-0751RL

YAGEOIn Stock: 11025AC0201FR-0751RL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC51R0F are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 51 Ohms
• 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 Compliant
• MSL rating: 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and physical dimensions, ensuring direct functional equivalence in automotive and industrial applications requiring AEC-Q200 qualification.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM51R0F (KOA Speer Electronics, Inc.)

This part is the manufacturer-recommended substitute from KOA Speer Electronics, Inc. It maintains identical electrical and mechanical specifications to the RK73H1HTTC51R0F while carrying an Active product status. This part is suitable for applications requiring continued supply of KOA Speer components within the RK73H series. Current inventory: 1,103 pieces.

AC0201FR-0751RL (YAGEO)

This part is a direct cross-reference substitute manufactured by YAGEO. It meets all electrical and mechanical requirements, including AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. The AC0201FR-0751RL is suitable for applications where multi-source component strategies are required or where YAGEO supply chain availability is preferred. Current inventory: 10,940 pieces.

Both substitute parts are qualified for direct replacement in automotive and industrial applications requiring AEC-Q200 certification and moisture-resistant thick film construction.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM51R0F be used as a direct replacement for the RK73H1HTTC51R0F?

A: Yes. Both parts share identical resistance (51 Ohms), tolerance (±1%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating temperature range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. The primary difference is product status: RK73H1HTTCM51R0F is Active, while RK73H1HTTC51R0F is Not For New Designs.

Q: Is the AC0201FR-0751RL compatible with designs using the RK73H1HTTC51R0F?

A: Yes. The AC0201FR-0751RL meets all electrical and mechanical specifications required for substitution, including 51 Ohm resistance, ±1% tolerance, 0.05W power rating, 0201 package, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, AEC-Q200 rating, and ROHS3 compliance.

Q: What is the significance of the 0201 package designation?

A: The 0201 package (0603 Metric) specifies the physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) with a maximum seated height of 0.010" (0.26mm). All substitute parts maintain these identical dimensions, ensuring compatibility with existing PCB layouts and assembly processes.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. Both RK73H1HTTCM51R0F and AC0201FR-0751RL carry AEC-Q200 automotive qualification, meeting the same reliability and performance standards as the original RK73H1HTTC51R0F.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level. Components with this rating have unlimited shelf life under normal storage conditions and do not require special moisture-control handling during assembly or storage.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: Yes. All three parts (RK73H1HTTC51R0F, RK73H1HTTCM51R0F, and AC0201FR-0751RL) are mechanically and electrically identical, with the same package footprint, termination configuration (2 terminations), and electrical performance characteristics.