RK73H1HTTC3904F Equivalent & Substitute Parts

Part Overview

The RK73H1HTTC3904F is a 3.9 MOhms ±1% thick film chip resistor manufactured by KOA Speer Electronics, Inc. in the 0201 (0603 Metric) package format. This component is rated for automotive applications under AEC-Q200 standard with a power rating of 0.05W (1/20W) and operates across the temperature range of -55°C to 155°C.

The RK73H1HTTC3904F carries a product status designation of "Not For New Designs," indicating that this part number is obsolete or being phased out. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for existing applications.

Substiute Parts

RK73H1HTTC3904F

KOA Speer Electronics, Inc.In Stock: 8429RK73H1HTTC3904F Datasheet

Current PartRFQ

RK73H1HTTCM3904F

KOA Speer Electronics, Inc.In Stock: 1128RK73H1HTTCM3904F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RK73H1HTTC3904F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 3.9 MOhms
• Tolerance: ±1%
• Power rating: 0.05W (1/20W)
• Temperature coefficient: ±200ppm/°C
• Operating temperature range: -55°C to 155°C

Mechanical & Package Parameters:

• Package format: 0201 (0603 Metric)
• Number of terminations: 2
• Physical dimensions: 0.024" L x 0.012" W (0.60mm x 0.30mm)
• Maximum seated height: 0.010" (0.26mm)

Compliance & Quality Parameters:

• Composition: Thick Film
• Automotive rating: AEC-Q200
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

Substitute parts must match all electrical specifications, maintain identical package dimensions, and retain all automotive and environmental compliance certifications. Deviations in any of these parameters disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The RK73H1HTTCM3904F is a direct functional equivalent to the RK73H1HTTC3904F. Both parts are manufactured by KOA Speer Electronics, Inc. within the RK73H series and share identical electrical, mechanical, and compliance specifications.

The primary distinction between these parts is product status: the RK73H1HTTC3904F is designated "Not For New Designs," while the RK73H1HTTCM3904F carries an "Active" status. This status difference indicates that the RK73H1HTTCM3904F represents the current production equivalent and is the recommended selection for ongoing applications.

Both parts maintain full AEC-Q200 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1). The electrical performance, temperature stability, and package compatibility are identical across both part numbers, ensuring seamless substitution in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the RK73H1HTTCM3904F be used as a direct replacement for the RK73H1HTTC3904F?

A: Yes. The RK73H1HTTCM3904F is a direct functional equivalent. All electrical parameters (resistance, tolerance, power rating, temperature coefficient), mechanical dimensions, package format, and compliance certifications are identical. The primary difference is product status, with the RK73H1HTTCM3904F being the active production part.

Q: What does "Not For New Designs" mean for the RK73H1HTTC3904F?

A: This designation indicates the part is obsolete or being phased out by the manufacturer. While existing inventory may be available, new designs should utilize the RK73H1HTTCM3904F, which carries "Active" status and represents the current production equivalent.

Q: Are there any differences in the 0201 package dimensions between these parts?

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

Q: Do both parts meet automotive AEC-Q200 requirements?

A: Yes. Both the RK73H1HTTC3904F and RK73H1HTTCM3904F are rated to AEC-Q200 standard and are suitable for automotive applications across the operating temperature range of -55°C to 155°C.

Q: What is the moisture sensitivity level for these resistors?

A: Both parts have a Moisture Sensitivity Level (MSL) of 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the RK73H1HTTC3904F and RK73H1HTTCM3904F are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.