MCR03EZPFX3091 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX3091 is a 3.09 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	3.09 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 ~ 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MCR03EZPFX3091 is determined by strict equivalence across the following parameters:

Resistance value: 3.09 kOhms
Tolerance: ±1%
Power rating: 0.1W (1/10W)
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

Direct substitutes maintain all electrical and mechanical parameters identically. Similar substitutes meet all core electrical specifications and package requirements but may differ in specific features such as automotive certification or moisture resistance designation. All listed parts are available in active production status or with confirmed inventory.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	RoHS3	MSL	Status	Inventory
MCR03EZPFX3091	Rohm Semiconductor	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	1	Discontinued	921 Pcs
CRCW06033K09FKEA	Vishay Dale	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	1	Active	39830 Pcs
ERJ-3EKF3091V	Panasonic Electronic Components	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	1	Active	29083 Pcs
RMCF0603FG3K09	Stackpole Electronics Inc	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	1	Active	10700 Pcs
RMCF0603FT3K09	Stackpole Electronics Inc	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	1	Active	122553 Pcs
CR0603-FX-3091ELF	Bourns Inc.	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Yes	1	Active	52248 Pcs
RC0603FR-073K09L	YAGEO	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Yes	1	Active	10200 Pcs
RC1608F3091CS	Samsung Electro-Mechanics	3.09 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Yes	1	Active	773 Pcs

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive certification, direct substitutes are CRCW06033K09FKEA (Vishay Dale), ERJ-3EKF3091V (Panasonic Electronic Components), RMCF0603FG3K09, and RMCF0603FT3K09 (Stackpole Electronics Inc). All maintain identical electrical specifications and automotive qualification.

RMCF0603FT3K09 offers the highest inventory availability at 122,553 pieces, followed by CRCW06033K09FKEA at 39,830 pieces. Both are active production parts with full AEC-Q200 compliance and ROHS3 certification.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-3091ELF (Bourns Inc.), RC0603FR-073K09L (YAGEO), and RC1608F3091CS (Samsung Electro-Mechanics) are functionally equivalent alternatives. These parts meet all core electrical and mechanical specifications with ROHS3 compliance and MSL 1 rating.

All substitute parts are ROHS3 compliant and rated for -55°C to 155°C operating temperature range, matching the original component's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part rated for non-automotive applications in an automotive circuit?

A: Substitution depends on circuit requirements. If AEC-Q200 certification is specified in the design, only parts with AEC-Q200 rating (CRCW06033K09FKEA, ERJ-3EKF3091V, RMCF0603FG3K09, RMCF0603FT3K09) are acceptable. Non-automotive rated parts do not meet this requirement.

Q: Are all substitute parts physically identical to the MCR03EZPFX3091?

A: All substitute parts use the 0603 (1608 Metric) package. Physical dimensions vary slightly between manufacturers within standard tolerances. Typical length ranges from 0.061" to 0.063" and height from 0.020" to 0.022". Verify specific PCB footprint requirements before selection.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes maintain AEC-Q200 automotive certification identical to the original part. Similar substitutes meet all electrical and mechanical specifications but lack automotive certification or feature moisture resistance designation instead of automotive qualification.

Q: Are all substitute parts available in the same packaging format?

A: Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) formats. RMCF0603FT3K09 and CRCW06033K09FKEA are supplied in Tape & Reel format with highest inventory levels. Verify packaging requirements for your procurement process.

Q: Do all parts meet RoHS compliance requirements?

A: All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original MCR03EZPFX3091 specifications.

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