Equivalent & Substitute Parts for RK73H1HTTC1583F

Part Overview

The RK73H1HTTC1583F is a 158 kOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated at 0.05W (1/20W) in a 0201 package (0.60mm x 0.30mm). This component is designed for automotive applications with AEC-Q200 qualification and moisture-resistant characteristics. The part is currently classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary to support existing designs, ensure supply chain continuity, and maintain compatibility with legacy systems.

Substiute Parts

RK73H1HTTC1583F

KOA Speer Electronics, Inc.In Stock: 1121RK73H1HTTC1583F Datasheet

Current PartRFQ

RK73H1HTTCM1583F

KOA Speer Electronics, Inc.In Stock: 1185RK73H1HTTCM1583F Datasheet

MFR RecommendedRFQ

AC0201FR-07158KL

YAGEOIn Stock: 904AC0201FR-07158KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC1583F are qualified based on the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Resistance value: 158 kOhms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C ~ 155°C

Mechanical & Packaging Criteria:

• Package type: 0201 (0603 Metric)
• Number of terminations: 2
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
• Height seated (max): 0.010" (0.26mm)

Compliance & Environmental Criteria:

• Automotive qualification: AEC-Q200
• Composition: Thick Film
• RoHS compliance: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1 (Unlimited)
• REACH status: REACH Unaffected

Substitute parts must match all electrical parameters, maintain identical package dimensions, and retain automotive-grade certifications to ensure functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RK73H1HTTCM1583F (KOA Speer Electronics, Inc.)

The RK73H1HTTCM1583F is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc. This part maintains identical electrical specifications (158 kOhms ±1%, 0.05W, ±200ppm/°C) and package dimensions (0201). Both parts are AEC-Q200 qualified and ROHS3 compliant. The key distinction is that RK73H1HTTCM1583F carries "Active" product status, making it the preferred choice for ongoing production and support. The primary difference is the absence of explicit moisture-resistant designation in the RK73H1HTTCM1583F specification, though both maintain MSL 1 rating.

Secondary Substitute: AC0201FR-07158KL (YAGEO)

The AC0201FR-07158KL from YAGEO provides a cross-manufacturer alternative with identical electrical and mechanical parameters. This part is AEC-Q200 qualified, ROHS3 compliant, and explicitly rated as moisture resistant. It carries "Active" product status and is available in Tape & Reel packaging. Selection of this part is appropriate when KOA supply is constrained or when multi-source qualification is required.

Selection Basis:

• All substitute parts match the electrical specification (158 kOhms ±1%, 0.05W, ±200ppm/°C, -55°C ~ 155°C)
• All substitute parts maintain identical 0201 package dimensions and mechanical compatibility
• All substitute parts retain AEC-Q200 automotive qualification
• All substitute parts are ROHS3 compliant and MSL 1 rated
• Substitutes differ only in manufacturer and product status (Active vs. Not For New Designs)

Frequently Asked Questions (FAQ)

Q1: Can RK73H1HTTCM1583F directly replace RK73H1HTTC1583F in existing designs?

A: Yes. Both parts are manufactured by KOA Speer Electronics, Inc., and share identical electrical specifications (158 kOhms ±1%, 0.05W, ±200ppm/°C), package dimensions (0201), and AEC-Q200 automotive qualification. The RK73H1HTTCM1583F is the active production equivalent and is suitable for direct substitution. The primary difference is product status; RK73H1HTTCM1583F is Active while RK73H1HTTC1583F is Not For New Designs.

Q2: What is the difference between RK73H1HTTC1583F and AC0201FR-07158KL?

A: Both parts are electrically and mechanically equivalent with 158 kOhms ±1% resistance, 0.05W power rating, 0201 package, and AEC-Q200 qualification. The primary differences are manufacturer (KOA vs. YAGEO) and explicit moisture-resistant designation. AC0201FR-07158KL is YAGEO's equivalent and is suitable for applications requiring multi-source qualification or when KOA supply is unavailable.

Q3: Are all substitute parts suitable for automotive applications?

A: Yes. All listed substitute parts carry AEC-Q200 automotive qualification, operate across the -55°C ~ 155°C temperature range, and are ROHS3 compliant. They are suitable for automotive circuit applications requiring 158 kOhms ±1% resistors in 0201 packages.

Q4: What is the significance of the "Not For New Designs" status?

A: This designation indicates that RK73H1HTTC1583F has been superseded by newer production parts. While existing inventory remains available, KOA recommends using RK73H1HTTCM1583F for new designs. The superseded part may have limited long-term availability and reduced manufacturer support.

Q5: Can these parts be used interchangeably in PCB assembly?

A: Yes. All substitute parts share identical 0201 package dimensions (0.60mm x 0.30mm), footprint, and termination configuration (2 terminations). They are mechanically and electrically interchangeable in PCB designs without layout modifications.

Q6: What is MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require moisture baking before soldering. This rating applies to all listed parts and simplifies inventory management and assembly processes.

Q7: Are there any compliance differences between the substitute parts?

A: No. All substitute parts are ROHS3 compliant, REACH Unaffected, and carry identical ECCN (EAR99) and HTSUS (8533.21.0030) classifications. They meet the same environmental and regulatory requirements.