MCR03EZPFX3901 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX3901 is a 3.9 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Resistance	3.9 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX3901 is determined by strict equivalence across the following parameters: resistance value (3.9 kOhms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and compliance certifications (AEC-Q200, ROHS3).

Substitute parts are classified into two categories:

Direct Substitutes maintain all electrical and mechanical specifications with active product status and full automotive certification. These parts are: CRCW06033K90FKEA (Vishay Dale), CRG0603F3K9 (TE Connectivity), ERJ-3EKF3901V (Panasonic), RMCF0603FG3K90 (Stackpole), and RMCF0603FT3K90 (Stackpole).

Similar Substitutes meet all core electrical specifications and package requirements but may have variations in specific features or certifications. These parts are: AC0603FR-073K9L (YAGEO), CR0603-FX-3901ELF (Bourns), and RC0603FR-073K9L (YAGEO).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Packaging Type
MCR03EZPFX3901	Rohm Semiconductor	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	Cut Tape & Digi-Reel
CRCW06033K90FKEA	Vishay Dale	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	Cut Tape & Digi-Reel
CRG0603F3K9	TE Connectivity	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Not specified	Active	Tape & Reel
ERJ-3EKF3901V	Panasonic Electronic Components	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	Tape & Reel
RMCF0603FG3K90	Stackpole Electronics Inc	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	Tape & Reel
RMCF0603FT3K90	Stackpole Electronics Inc	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	Cut Tape & Digi-Reel
AC0603FR-073K9L	YAGEO	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	Tape & Reel
CR0603-FX-3901ELF	Bourns Inc.	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Not specified	Active	Tape & Reel
RC0603FR-073K9L	YAGEO	3.9 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Not specified	Active	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For automotive applications requiring AEC-Q200 certification, direct substitutes with active product status are preferred: CRCW06033K90FKEA, ERJ-3EKF3901V, RMCF0603FG3K90, and RMCF0603FT3K90. These parts maintain full compliance with automotive standards and ensure continuity with the original MCR03EZPFX3901 specification.

RMCF0603FT3K90 offers the highest inventory availability (118,298 pcs) with Cut Tape & Digi-Reel packaging, matching the original part's packaging format. CRCW06033K90FKEA provides the second-highest availability (65,623 pcs) with identical packaging.

For non-automotive applications or where AEC-Q200 certification is not mandatory, similar substitutes AC0603FR-073K9L, CR0603-FX-3901ELF, and RC0603FR-073K9L are functionally equivalent with active product status. RC0603FR-073K9L has the largest inventory (398,942 pcs) and Cut Tape & Digi-Reel packaging availability.

CRG0603F3K9 from TE Connectivity is electrically equivalent but lacks specified AEC-Q200 rating; use only where automotive certification is not required.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the MCR03EZPFX3901?

A: Direct substitutes (CRCW06033K90FKEA, ERJ-3EKF3901V, RMCF0603FG3K90, RMCF0603FT3K90) are fully interchangeable for automotive applications. Similar substitutes (AC0603FR-073K9L, CR0603-FX-3901ELF, RC0603FR-073K9L) are electrically equivalent but may lack AEC-Q200 certification. CRG0603F3K9 is electrically equivalent but certification status is undefined.

Q: What is the significance of AEC-Q200 rating?

A: AEC-Q200 is an automotive electronics council qualification standard for passive components. It certifies the part for automotive use with specified reliability and performance standards. For automotive applications, use only parts with confirmed AEC-Q200 rating.

Q: Does packaging type affect substitution?

A: Packaging type (Cut Tape & Digi-Reel vs. Tape & Reel) affects handling and assembly processes but does not affect electrical performance. Select based on your assembly equipment and supply chain requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the original MCR03EZPFX3901 specification.

Q: What is the difference between Direct and Similar substitutes?

A: Direct substitutes maintain all electrical and mechanical specifications with confirmed AEC-Q200 certification and active product status. Similar substitutes meet core electrical specifications and package requirements but may have variations in automotive certification or specific features.

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