RK73H1HTTC1243F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC1243F is a 124 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in the 0201 package (0603 Metric). This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC1243F is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary to support existing designs, legacy system maintenance, and procurement continuity when the original part becomes unavailable.

Substiute Parts

RK73H1HTTC1243F

KOA Speer Electronics, Inc.In Stock: 11604RK73H1HTTC1243F Datasheet

Current PartRFQ

RK73H1HTTCM1243F

KOA Speer Electronics, Inc.In Stock: 1111RK73H1HTTCM1243F Datasheet

MFR RecommendedRFQ

AC0201FR-07124KL

YAGEOIn Stock: 1042AC0201FR-07124KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC1243F are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 124 kOhms
• 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
• MSL rating: 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and physical dimensions. Substitution is valid across manufacturers when these parameters are matched. Product status (Active vs. Not For New Designs) does not affect electrical or mechanical compatibility but indicates design lifecycle stage.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM1243F (KOA Speer Electronics, Inc.): This part is the manufacturer-recommended successor to the RK73H1HTTC1243F. Both are KOA products within the RK73H series, ensuring design continuity and supply chain alignment with the original manufacturer. The RK73H1HTTCM1243F carries Active product status, indicating ongoing production and long-term availability. All electrical and mechanical specifications are identical. This option is preferred for new procurement and design transitions.

AC0201FR-07124KL (YAGEO): This YAGEO part provides a cross-manufacturer substitute with identical electrical and mechanical parameters. The AC0201FR-07124KL maintains AEC-Q200 automotive qualification, moisture resistance, and RoHS3 compliance. Active product status ensures availability. This option is suitable for applications requiring multi-source qualification or when KOA supply is constrained.

Both substitute parts are electrically and mechanically interchangeable with the original RK73H1HTTC1243F in all specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM1243F directly replace RK73H1HTTC1243F in existing designs?

A: Yes. Both parts share identical resistance (124 kOhms), tolerance (±1%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 qualification. The RK73H1HTTCM1243F is the manufacturer-recommended active successor.

Q: Is AC0201FR-07124KL compatible with designs specified for RK73H1HTTC1243F?

A: Yes. The YAGEO AC0201FR-07124KL matches all critical electrical and mechanical parameters: 124 kOhms ±1%, 0.05W, 0201 package, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, AEC-Q200 rating, and moisture resistance. Cross-manufacturer substitution is valid.

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

A: This designation indicates the RK73H1HTTC1243F has been superseded in the manufacturer's product line. It does not affect electrical or mechanical performance in existing applications. However, for new designs, the active successor RK73H1HTTCM1243F is recommended for long-term supply assurance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. RK73H1HTTC1243F, RK73H1HTTCM1243F, and AC0201FR-07124KL are all ROHS3 Compliant, meeting current environmental and regulatory requirements.

Q: Does package size differ between these parts?

A: No. All three parts use the 0201 package (0603 Metric) with identical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm).

Q: What is the MSL rating, and why does it matter?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity limitations. These components can be stored indefinitely without desiccant packaging or special environmental controls, simplifying inventory management and logistics.