Equivalent & Substitute Parts for RK73H1HTTC1743F

Part Overview

The RK73H1HTTC1743F is a 174 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 construction. The part is currently classified as "Not For New Designs," indicating it has been superseded. Identifying equivalent and substitute parts is necessary for ongoing support of legacy systems, inventory optimization, and design flexibility when the primary part becomes unavailable.

Substiute Parts

RK73H1HTTC1743F

KOA Speer Electronics, Inc.In Stock: 1048RK73H1HTTC1743F Datasheet

Current PartRFQ

RK73H1HTTCM1743F

KOA Speer Electronics, Inc.In Stock: 861RK73H1HTTCM1743F Datasheet

MFR RecommendedRFQ

AC0201FR-07174KL

YAGEOIn Stock: 711AC0201FR-07174KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC1743F is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 174 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 Compliant
• MSL rating: 1 (Unlimited)

All identified substitute parts meet these parameters without exception. Substitutes are grouped into two categories: (1) manufacturer-recommended alternatives within the same series, and (2) direct cross-reference parts from alternative manufacturers with identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: RK73H1HTTCM1743F (KOA Speer Electronics)

This part is the manufacturer-recommended successor to the RK73H1HTTC1743F. Both are from the same RK73H series and share identical electrical specifications. The RK73H1HTTCM1743F carries "Active" product status, ensuring long-term availability and supply chain stability. It maintains full AEC-Q200 automotive qualification and ROHS3 compliance. Selection of this part provides continuity within the KOA product ecosystem and leverages established supplier relationships.

Secondary Recommendation: AC0201FR-07174KL (YAGEO)

This YAGEO part provides a direct cross-reference alternative with complete electrical and mechanical equivalence. It is explicitly listed as a substitute in the original part documentation. The AC0201FR-07174KL is also in "Active" status with AEC-Q200 qualification, ROHS3 compliance, and moisture-resistant construction. This option is suitable when KOA supply is constrained or when multi-source qualification is required for supply chain resilience.

Both substitute parts are suitable for direct replacement in applications currently using the RK73H1HTTC1743F, with no circuit redesign or validation required.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM1743F be used as a direct replacement for RK73H1HTTC1743F?

A: Yes. Both parts are from the KOA RK73H series with identical resistance (174 kOhms), tolerance (±1%), power rating (0.05W), package (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 automotive qualification. The primary difference is product status: the original is "Not For New Designs" while the substitute is "Active," making it the recommended choice for ongoing production.

Q: What is the difference between RK73H1HTTC1743F and RK73H1HTTCM1743F?

A: The RK73H1HTTCM1743F is the active production variant of the same part. Both share identical electrical and mechanical specifications. The "M" designation in the part number indicates a manufacturing revision or packaging update. The substitute is preferred for new procurement due to its active status and assured long-term availability.

Q: Is AC0201FR-07174KL from YAGEO electrically equivalent?

A: Yes. The AC0201FR-07174KL meets all critical electrical parameters: 174 kOhms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, and AEC-Q200 automotive qualification. It is packaged identically in 0201 format with moisture-resistant thick film construction and ROHS3 compliance.

Q: Can I mix KOA and YAGEO parts in the same production run?

A: Yes. Both manufacturers' parts are electrically and mechanically equivalent with identical package dimensions (0.024" L x 0.012" W, 0.60mm x 0.30mm) and height (0.010" max seated). Both carry AEC-Q200 qualification and MSL 1 rating. Mixing is acceptable from a technical standpoint; however, supply chain and quality documentation procedures should be reviewed with your procurement and quality teams.

Q: What does AEC-Q200 qualification mean for this resistor?

A: AEC-Q200 is the Automotive Electronics Council standard for passive components in automotive applications. It certifies that the part meets stringent reliability, temperature cycling, moisture resistance, and failure rate requirements for use in automotive environments. All three parts listed carry this qualification.

Q: Is the 0201 package suitable for automated assembly?

A: Yes. The 0201 package (0.60mm x 0.30mm) is a standard surface-mount package supported by modern pick-and-place equipment and reflow soldering processes. All substitute parts are available in Tape & Reel (TR) packaging format, which is standard for automated assembly lines.

Q: What does MSL 1 (Unlimited) mean?

A: MSL (Moisture Sensitivity Level) 1 indicates the lowest moisture sensitivity classification. Parts with MSL 1 have unlimited shelf life and do not require special moisture-controlled storage or baking procedures before soldering. This simplifies inventory management and reduces handling costs.