Equivalent & Substitute Parts for RK73H1HTTC43R2F

Part Overview

The RK73H1HTTC43R2F is a 43.2 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 with AEC-Q200 qualification and moisture-resistant construction. The part is currently classified as Not For New Designs, making identification of active equivalent and substitute components essential for ongoing production and design updates.

Substiute Parts

RK73H1HTTC43R2F

KOA Speer Electronics, Inc.In Stock: 17023RK73H1HTTC43R2F Datasheet

Current PartRFQ

RK73H1HTTCM43R2F

KOA Speer Electronics, Inc.In Stock: 859RK73H1HTTCM43R2F Datasheet

MFR RecommendedRFQ

AC0201FR-0743R2L

YAGEOIn Stock: 1093AC0201FR-0743R2L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC43R2F is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Resistance value: 43.2 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

All substitute parts listed maintain identical electrical specifications and environmental ratings. Substitutes are grouped by manufacturer and product status (Active vs. Not For New Designs).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: RK73H1HTTCM43R2F (KOA Speer Electronics)

The RK73H1HTTCM43R2F is the manufacturer-recommended substitute from KOA Speer Electronics. This part maintains identical electrical and thermal specifications while offering Active product status. Selection of this variant ensures continuity within the KOA RK73H series and provides ongoing manufacturer support. Current inventory: 823 units.

Secondary Recommendation: AC0201FR-0743R2L (YAGEO)

The AC0201FR-0743R2L from YAGEO provides a direct cross-reference alternative with Active product status. This part meets all electrical, thermal, and automotive compliance requirements, including AEC-Q200 qualification and moisture resistance. The YAGEO AC series offers equivalent performance with established supply chain availability. Current inventory: 1019 units.

Both substitute parts are ROHS3 compliant, MSL 1 rated, and suitable for automotive applications requiring AEC-Q200 qualification. Selection between these options depends on supply chain preferences and existing design qualification history.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM43R2F replace RK73H1HTTC43R2F in existing designs?

A: Yes. The RK73H1HTTCM43R2F is the manufacturer-recommended substitute with identical electrical specifications (43.2 Ohms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C). Both parts are AEC-Q200 qualified and ROHS3 compliant. The primary difference is product status: the original is Not For New Designs while the substitute is Active.

Q: Is AC0201FR-0743R2L from YAGEO electrically equivalent?

A: Yes. The AC0201FR-0743R2L meets all electrical and environmental specifications: 43.2 Ohms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, AEC-Q200 automotive qualification, and ROHS3 compliance. This part is suitable for direct substitution in automotive applications.

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

A: This designation indicates the RK73H1HTTC43R2F is in mature/legacy phase. While existing inventory remains available, the manufacturer recommends using active alternatives (RK73H1HTTCM43R2F or equivalent) for new design implementations to ensure long-term supply continuity and manufacturer support.

Q: Are all substitute parts moisture resistant?

A: The RK73H1HTTC43R2F and AC0201FR-0743R2L are explicitly specified as moisture resistant. The RK73H1HTTCM43R2F does not list moisture resistance in its specification. If moisture resistance is a design requirement, select either the original part or the YAGEO AC0201FR-0743R2L.

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

A: Yes. All listed parts share identical package specifications (0201 / 0603 Metric), footprint dimensions (0.024" L x 0.012" W / 0.60mm x 0.30mm), and height (0.010" max / 0.26mm max). No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to all substitute parts?

A: All parts are AEC-Q200 qualified for automotive applications, ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). ECCN classification is EAR99 for all variants.