RK73H1HTTC91R0F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC91R0F is a 91 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 and meets AEC-Q200 qualification standards with moisture-resistant construction.

The product status is listed as "Not For New Designs," indicating that while the part remains available in inventory (17,729 pieces), KOA Speer Electronics has transitioned this model out of active development. Identifying equivalent and substitute parts is necessary for design continuity, supply chain flexibility, and long-term project sustainability when the primary part reaches end-of-life or when alternative sourcing is required.

Substiute Parts

RK73H1HTTC91R0F

KOA Speer Electronics, Inc.In Stock: 17795RK73H1HTTC91R0F Datasheet

Current PartRFQ

RK73H1HTTCM91R0F

KOA Speer Electronics, Inc.In Stock: 1204RK73H1HTTCM91R0F Datasheet

MFR RecommendedRFQ

AC0201FR-0791RL

YAGEOIn Stock: 5142AC0201FR-0791RL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC91R0F is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 91 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
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

All identified substitute parts meet these parameters without exception. Substitutes are grouped into two categories: manufacturer-recommended alternatives from the same supplier (KOA Speer Electronics) and direct cross-references from alternative manufacturers (YAGEO) that maintain full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM91R0F (KOA Speer Electronics - Manufacturer Recommended)

This part is the manufacturer-recommended substitute from KOA Speer Electronics. It maintains identical electrical specifications and automotive qualification (AEC-Q200) as the primary part. The key distinction is its "Active" product status, indicating ongoing manufacturer support and availability. This part is suitable for new designs and provides continuity within the KOA Speer RK73H series. Inventory availability is lower (1,105 pieces) compared to the primary part. Note that moisture resistance is not explicitly specified for this variant, though it shares the same series designation and core specifications.

AC0201FR-0791RL (YAGEO - Direct Cross-Reference)

This YAGEO part provides a direct cross-reference with full electrical and mechanical equivalence to the primary part. It maintains all critical parameters including 91 Ohm resistance, ±1% tolerance, 0.05W power rating, 0201 package, thick film composition, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. The AC0201FR-0791RL explicitly includes moisture-resistant construction, matching the primary part specification. Product status is "Active," ensuring long-term availability and manufacturer support. Inventory is substantial at 5,054 pieces. This part is suitable for both existing designs requiring replacement components and new designs requiring alternative sourcing.

Selection Criteria:

• For design continuity within the KOA Speer ecosystem: Select RK73H1HTTCM91R0F
• For multi-source supply chain strategy: Select AC0201FR-0791RL
• For new designs: Select either RK73H1HTTCM91R0F or AC0201FR-0791RL based on supplier preference and inventory requirements
• For existing designs using RK73H1HTTC91R0F: Both substitutes provide direct compatibility without circuit redesign

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM91R0F be used as a direct replacement for RK73H1HTTC91R0F?

A: Yes. Both parts share identical electrical specifications (91 Ohms ±1%, 0.05W, ±200ppm/°C, -55°C to 155°C), package format (0201), composition (thick film), automotive qualification (AEC-Q200), and compliance ratings (ROHS3, MSL 1). The primary difference is product status: RK73H1HTTCM91R0F is active, while RK73H1HTTC91R0F is not for new designs. No circuit modifications are required.

Q: Is AC0201FR-0791RL electrically equivalent to RK73H1HTTC91R0F?

A: Yes. The AC0201FR-0791RL meets all electrical and mechanical requirements of the primary part: 91 Ohm resistance, ±1% tolerance, 0.05W power rating, 0201 package, thick film construction, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, AEC-Q200 automotive rating, ROHS3 compliance, and MSL 1 rating. It is a direct cross-reference suitable for replacement without design changes.

Q: What is the significance of the "Not For New Designs" status on RK73H1HTTC91R0F?

A: This status indicates that KOA Speer Electronics has discontinued active development and promotion of this part number. While inventory remains available (17,729 pieces), the manufacturer recommends using RK73H1HTTCM91R0F for new projects. Existing designs may continue using RK73H1HTTC91R0F until supply is exhausted, after which substitution to an active part number is necessary.

Q: Are there any differences in moisture resistance between the three parts?

A: RK73H1HTTC91R0F and AC0201FR-0791RL both explicitly specify moisture-resistant construction. RK73H1HTTCM91R0F does not include moisture resistance in its specification sheet, though it shares the same RK73H series designation. For applications requiring confirmed moisture resistance, AC0201FR-0791RL or RK73H1HTTC91R0F are preferred.

Q: Can these parts be used interchangeably in automotive applications?

A: Yes. All three parts carry AEC-Q200 automotive qualification, indicating compliance with automotive industry reliability and quality standards. They are suitable for automotive circuit applications without additional qualification testing.

Q: What is the difference between Tape & Reel (TR) packaging and unspecified packaging?

A: Tape & Reel packaging is the standard format for automated assembly processes, with components wound on a continuous tape for pick-and-place equipment. RK73H1HTTC91R0F and AC0201FR-0791RL are explicitly packaged in Tape & Reel format. RK73H1HTTCM91R0F does not specify packaging type in the provided data. For automated manufacturing, confirm packaging compatibility with your assembly equipment before procurement.

Q: Which part should be selected for supply chain redundancy?

A: For multi-source supply chain strategy, use both RK73H1HTTCM91R0F (KOA Speer) and AC0201FR-0791RL (YAGEO). This approach ensures availability from two independent manufacturers and reduces single-source supply risk. Current inventory levels support this strategy: 1,105 pieces of RK73H1HTTCM91R0F and 5,054 pieces of AC0201FR-0791RL are available.