RK73H1HTTC46R4F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC46R4F is a 46.4 Ohm ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc., rated for 0.05W (1/20W) power dissipation in a 0201 (0603 Metric) surface mount package. This component is designed for automotive applications and meets AEC-Q200 qualification standards with moisture-resistant construction.

The RK73H1HTTC46R4F carries a product status of "Not For New Designs," indicating that KOA Speer Electronics has transitioned this part to end-of-life status. Identifying equivalent and substitute parts is necessary to support existing designs, maintain production continuity for legacy systems, and ensure component availability for repair and maintenance applications.

Substiute Parts

RK73H1HTTC46R4F

KOA Speer Electronics, Inc.In Stock: 959RK73H1HTTC46R4F Datasheet

Current PartRFQ

RK73H1HTTCM46R4F

KOA Speer Electronics, Inc.In Stock: 810RK73H1HTTCM46R4F Datasheet

MFR RecommendedRFQ

AC0201FR-0746R4L

YAGEOIn Stock: 697AC0201FR-0746R4L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC46R4F is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters:

• Resistance value: 46.4 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C ~ 155°C (exact match required)

Mechanical Parameters:

• Package / Case: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Number of terminations: 2 (exact match required)

Compliance & Certification:

• Automotive AEC-Q200 qualification (required for automotive applications)
• RoHS3 compliance (required for regulatory conformance)
• Moisture Sensitivity Level MSL 1 (required for handling and storage)

Substitute parts must satisfy all parameters listed above to ensure functional and mechanical compatibility within the original circuit design.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM46R4F (MFR Recommended Substitute)

The RK73H1HTTCM46R4F is the manufacturer-recommended equivalent from KOA Speer Electronics, Inc. This part maintains identical electrical specifications and package configuration to the RK73H1HTTC46R4F while carrying an "Active" product status. The primary distinction is the absence of explicit moisture-resistant designation in the available specifications, though both parts share MSL 1 rating and AEC-Q200 automotive qualification. This substitute is appropriate for applications where the original part's moisture-resistant feature is not a critical design requirement.

AC0201FR-0746R4L (Direct Substitute)

The AC0201FR-0746R4L, manufactured by YAGEO, provides a cross-manufacturer equivalent with full parameter alignment to the RK73H1HTTC46R4F. This part maintains the 46.4 Ohm resistance, ±1% tolerance, 0.05W power rating, 0201 package, thick film composition, ±200ppm/°C temperature coefficient, and -55°C ~ 155°C operating range. The AC0201FR-0746R4L includes explicit moisture-resistant construction, matching the environmental protection features of the original part. Both parts carry AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. The AC0201FR-0746R4L is supplied in Tape & Reel packaging, consistent with the original part's packaging format. This substitute is suitable for direct replacement in automotive and industrial applications requiring equivalent performance and environmental protection.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM46R4F be used as a direct replacement for the RK73H1HTTC46R4F?

A: The RK73H1HTTCM46R4F matches all critical electrical and mechanical parameters of the RK73H1HTTC46R4F, including resistance, tolerance, power rating, package, composition, temperature coefficient, and operating temperature range. Both parts are AEC-Q200 qualified and ROHS3 compliant. The primary difference is that moisture-resistant construction is not explicitly specified for the RK73H1HTTCM46R4F in the available data. If moisture resistance is a design requirement, the AC0201FR-0746R4L is the preferred substitute.

Q: What is the significance of the "Not For New Designs" status on the RK73H1HTTC46R4F?

A: "Not For New Designs" indicates that KOA Speer Electronics has discontinued active development and promotion of this part number. The manufacturer recommends using the RK73H1HTTCM46R4F for new designs. However, the RK73H1HTTC46R4F remains available for existing production runs and legacy system support.

Q: Are all three parts electrically interchangeable?

A: Yes. The RK73H1HTTCM46R4F and AC0201FR-0746R4L both match the RK73H1HTTC46R4F across all specified electrical parameters: 46.4 Ohms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, and -55°C ~ 155°C operating temperature range.

Q: Does the 0201 package size differ between manufacturers?

A: No. The 0201 (0603 Metric) package is a standardized surface mount package format. All three parts use identical physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) with a maximum seated height of 0.010" (0.26mm). The parts are mechanically interchangeable on PCB layouts designed for 0201 components.

Q: What is the difference between the RK73H1HTTC46R4F and RK73H1HTTCM46R4F part numbers?

A: Both parts are manufactured by KOA Speer Electronics, Inc., and share the RK73H series designation. The primary difference is product status: the RK73H1HTTC46R4F is "Not For New Designs," while the RK73H1HTTCM46R4F is "Active." The RK73H1HTTCM46R4F is the current production equivalent recommended by the manufacturer for ongoing applications.

Q: Is the AC0201FR-0746R4L suitable for automotive applications?

A: Yes. The AC0201FR-0746R4L carries AEC-Q200 automotive qualification, matching the automotive rating of the RK73H1HTTC46R4F. Both parts are approved for use in automotive environments and meet the same automotive reliability standards.

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

A: MSL 1 (Unlimited) indicates the lowest moisture sensitivity level. Components with this rating do not require special moisture-control handling during storage, transportation, or assembly. All three parts carry MSL 1 rating, eliminating moisture-related handling constraints.

Q: Are there any compliance or regulatory differences between the three parts?

A: No. All three parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8533.21.0030) classifications. There are no regulatory or compliance barriers to substitution.