Equivalent & Substitute Parts for RK73H1HTTC5491F

Part Overview

The RK73H1HTTC5491F is a 5.49 kOhm ±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 qualified to AEC-Q200 automotive standards and features moisture-resistant construction suitable for automotive and industrial applications operating across -55°C to 155°C.

The RK73H1HTTC5491F carries a "Not For New Designs" product status. Identifying equivalent and substitute parts is necessary to support ongoing production requirements, field replacements, and design continuity for existing applications where this resistor is specified.

Substiute Parts

RK73H1HTTC5491F

KOA Speer Electronics, Inc.In Stock: 28663RK73H1HTTC5491F Datasheet

Current PartRFQ

RK73H1HTTCM5491F

KOA Speer Electronics, Inc.In Stock: 933RK73H1HTTCM5491F Datasheet

MFR RecommendedRFQ

AC0201FR-075K49L

YAGEOIn Stock: 1025AC0201FR-075K49L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RK73H1HTTC5491F are qualified based on the following electrical and mechanical parameters:

Substitution Criteria:

• Resistance value: 5.49 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.05W / 1/20W (exact match required)
• Package: 0201 (0603 Metric) (exact match required)
• Composition: Thick Film (exact match required)
• Temperature coefficient: ±200ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Automotive qualification: AEC-Q200 (exact match required)
• Moisture resistance: Required
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: MSL 1 (exact match required)

Two substitute parts meet all substitution criteria:

MFR Recommended Substitute: RK73H1HTTCM5491F (KOA Speer Electronics, Inc.) — Active product status, same manufacturer series with identical electrical and mechanical specifications.

Direct Manufacturer Substitute: AC0201FR-075K49L (YAGEO) — Active product status, alternative manufacturer with identical electrical and mechanical specifications and moisture-resistant construction.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM5491F (MFR Recommended Substitute): This part is the manufacturer-recommended alternative from KOA Speer Electronics, Inc. It maintains identical electrical specifications, package dimensions, and AEC-Q200 automotive qualification. Active product status ensures long-term availability and supply chain continuity. Selection of this part is appropriate for applications requiring same-manufacturer continuity and ongoing design support.

AC0201FR-075K49L (Direct Manufacturer Substitute): This YAGEO part provides cross-manufacturer equivalence with identical electrical and mechanical parameters, including moisture-resistant construction and AEC-Q200 qualification. Active product status and demonstrated inventory availability support production requirements. This part is suitable for applications where multi-source qualification is acceptable and supply diversification is beneficial.

Both substitute parts satisfy all electrical, mechanical, and compliance requirements specified for the RK73H1HTTC5491F. Selection between them depends on supply chain strategy, existing qualification documentation, and manufacturer preference within the design organization.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM5491F be used as a direct replacement for RK73H1HTTC5491F?

A: Yes. Both parts share identical resistance (5.49 kOhms), tolerance (±1%), power rating (0.05W), package (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating temperature range (-55°C to 155°C), AEC-Q200 qualification, and RoHS/MSL compliance. The primary difference is product status: RK73H1HTTCM5491F is Active, while the original is Not For New Designs.

Q: Is AC0201FR-075K49L electrically equivalent to RK73H1HTTC5491F?

A: Yes. AC0201FR-075K49L meets all electrical specifications: 5.49 kOhms ±1%, 0.05W power rating, ±200ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 automotive qualification. Physical dimensions and package are identical (0201 / 0603 Metric).

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

A: This status indicates the RK73H1HTTC5491F is in mature/end-of-life phase and is not recommended for new circuit designs. However, it remains available for existing production and field replacement applications. The substitute parts with Active status are preferred for new designs and long-term production planning.

Q: Are all three parts moisture-resistant?

A: RK73H1HTTC5491F and AC0201FR-075K49L are explicitly specified as moisture-resistant. RK73H1HTTCM5491F does not include moisture resistance in its specification sheet, though it maintains all other equivalent parameters.

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

A: Yes. All three parts carry AEC-Q200 automotive qualification, operate across -55°C to 155°C, and meet ROHS3 compliance. They are suitable for automotive circuit applications where the RK73H1HTTC5491F was originally specified.

Q: What is the difference in packaging between these parts?

A: RK73H1HTTC5491F and AC0201FR-075K49L are supplied in Tape & Reel (TR) packaging. RK73H1HTTCM5491F packaging is not specified in available documentation. All three parts use identical 0201 (0603 Metric) package geometry with 0.024" L x 0.012" W dimensions and 0.010" maximum seated height.