Equivalent & Substitute Parts for RK73H1HTTC3900F

Part Overview

The RK73H1HTTC3900F is a 390 Ohm ±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 metric). This component meets automotive AEC-Q200 qualification and incorporates moisture-resistant construction suitable for harsh operating environments. The part is classified as "Not For New Designs," indicating it has been superseded. Identification of equivalent and substitute parts is necessary to support existing designs, legacy system maintenance, and procurement continuity.

Substiute Parts

RK73H1HTTC3900F

KOA Speer Electronics, Inc.In Stock: 53405RK73H1HTTC3900F Datasheet

Current PartRFQ

RK73H1HTTCM3900F

KOA Speer Electronics, Inc.In Stock: 880RK73H1HTTCM3900F Datasheet

MFR RecommendedRFQ

AC0201FR-07390RL

YAGEOIn Stock: 19455AC0201FR-07390RL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RK73H1HTTC3900F is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Resistance value: 390 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
• Moisture resistance: Required
• RoHS compliance: ROHS3
• Moisture sensitivity level: MSL 1

All identified substitute parts meet these criteria without exception. Substitution is based solely on functional and environmental equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

RK73H1HTTCM3900F (KOA Speer Electronics, Inc.): This part is the manufacturer-recommended successor to the RK73H1HTTC3900F. Both are KOA products within the RK73H series. The RK73H1HTTCM3900F carries Active product status, ensuring continued availability and manufacturing support. All electrical and mechanical parameters are identical to the original part. The primary distinction is the absence of explicit moisture-resistant designation in the specification; however, both parts maintain MSL 1 rating and ROHS3 compliance. This part is the preferred choice for new procurement and design transitions.

AC0201FR-07390RL (YAGEO): This YAGEO component provides full electrical and mechanical equivalence to the RK73H1HTTC3900F, including explicit moisture-resistant construction. The AC0201FR-07390RL maintains Active product status with higher inventory availability (19,348 units in stock). All critical parameters—resistance, tolerance, power rating, package, temperature coefficient, operating range, AEC-Q200 qualification, and RoHS compliance—are identical. This part serves as a cross-manufacturer alternative suitable for applications requiring supply chain diversification or when KOA parts are unavailable.

Frequently Asked Questions (FAQ)

Q: Can RK73H1HTTCM3900F be used as a direct replacement for RK73H1HTTC3900F?

A: Yes. Both parts are manufactured by KOA Speer Electronics, Inc., and share identical electrical specifications (390 Ohms ±1%, 0.05W), package geometry (0201), temperature coefficient (±200ppm/°C), operating range (-55°C ~ 155°C), and automotive qualification (AEC-Q200). The RK73H1HTTCM3900F is the active successor product.

Q: What is the difference between RK73H1HTTC3900F and RK73H1HTTCM3900F?

A: The primary difference is product status. RK73H1HTTC3900F is classified as "Not For New Designs," while RK73H1HTTCM3900F is Active. The RK73H1HTTC3900F explicitly specifies moisture-resistant construction; the RK73H1HTTCM3900F does not include this designation in its description, though both maintain MSL 1 rating.

Q: Can YAGEO AC0201FR-07390RL replace KOA RK73H1HTTC3900F?

A: Yes. The AC0201FR-07390RL meets all specified electrical and mechanical parameters: 390 Ohms ±1%, 0.05W power rating, 0201 package, ±200ppm/°C temperature coefficient, -55°C ~ 155°C operating range, AEC-Q200 automotive qualification, moisture-resistant construction, ROHS3 compliance, and MSL 1 rating. This represents a valid cross-manufacturer substitution.

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

A: No. All three parts use the identical 0201 package (0.60mm x 0.30mm metric), with matching dimensions (0.024" L x 0.012" W) and maximum seated height (0.010" / 0.26mm). PCB footprints and assembly processes are interchangeable.

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

A: RK73H1HTTCM3900F is the recommended choice, as it is the manufacturer-designated active successor with continued production support. AC0201FR-07390RL is suitable when supply chain diversification or YAGEO component standardization is required.

Q: Do all substitute parts maintain automotive AEC-Q200 qualification?

A: Yes. RK73H1HTTCM3900F and AC0201FR-07390RL both carry AEC-Q200 qualification, meeting automotive reliability and qualification standards equivalent to the original RK73H1HTTC3900F.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: All three parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions and unlimited shelf life under standard storage conditions.