Equivalent & Substitute Parts for RK73H1HTTC8451F

Part Overview

The RK73H1HTTC8451F is an 8.45 kOhm ±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 meets automotive AEC-Q200 qualification and includes moisture-resistant construction. The part is currently classified as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and new design initiatives.

Substiute Parts

RK73H1HTTC8451F

KOA Speer Electronics, Inc.In Stock: 11477RK73H1HTTC8451F Datasheet

Current PartRFQ

RK73H1HTTCM8451F

KOA Speer Electronics, Inc.In Stock: 964RK73H1HTTCM8451F Datasheet

MFR RecommendedRFQ

AC0201FR-078K45L

YAGEOIn Stock: 1127AC0201FR-078K45L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC8451F is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Resistance value: 8.45 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
• Moisture sensitivity: MSL 1

All substitute parts listed below meet these exact specifications. Substitutes are grouped by manufacturer and product status to facilitate component selection based on availability and design phase requirements.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs:

The RK73H1HTTCM8451F (KOA Speer Electronics, Inc.) is the manufacturer-recommended substitute. This part maintains identical electrical specifications and automotive AEC-Q200 qualification while carrying Active product status. The primary distinction is the absence of moisture-resistant construction in the standard specification; however, MSL 1 rating ensures compatibility with standard assembly processes.

For Moisture-Critical Applications:

The AC0201FR-078K45L (YAGEO) provides an alternative from a different manufacturer while retaining moisture-resistant construction and all required electrical parameters. This part is Active and maintains full AEC-Q200 compliance, ROHS3 certification, and MSL 1 rating.

Compliance Considerations:

All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Selection between active substitutes should be based on supply chain requirements, inventory availability, and specific application moisture exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM8451F replace RK73H1HTTC8451F in existing designs?

A: Yes. Both parts share identical resistance (8.45 kOhms), tolerance (±1%), power rating (0.05W), package (0201), composition (thick film), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and AEC-Q200 qualification. The primary difference is product status: RK73H1HTTCM8451F is Active while RK73H1HTTC8451F is Not For New Designs.

Q: What is the difference between RK73H1HTTC8451F and RK73H1HTTCM8451F?

A: The RK73H1HTTCM8451F omits moisture-resistant construction in its standard specification, though both maintain MSL 1 rating. All other electrical and mechanical parameters are identical.

Q: Is AC0201FR-078K45L (YAGEO) a direct substitute?

A: Yes. The AC0201FR-078K45L meets all critical parameters: 8.45 kOhms ±1%, 0.05W, 0201 package, thick film composition, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, AEC-Q200 qualification, moisture resistance, ROHS3 compliance, and MSL 1 rating. It is manufactured by YAGEO and carries Active product status.

Q: Are there any package or footprint differences between these substitutes?

A: No. All three parts use the 0201 package (0603 Metric) with identical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm) and maximum seated height of 0.010" (0.26mm). PCB footprints are interchangeable.

Q: Which substitute should be selected for new automotive designs?

A: Either RK73H1HTTCM8451F (KOA, Active status) or AC0201FR-078K45L (YAGEO, Active status) are appropriate. Selection depends on supply chain strategy, inventory availability, and moisture exposure requirements. Both maintain full AEC-Q200 qualification and ROHS3 compliance.

Q: Are all substitutes suitable for high-temperature applications?

A: Yes. All three parts operate across the identical temperature range of -55°C ~ 155°C with ±200ppm/°C temperature coefficient, meeting automotive thermal requirements.