MCR03EZPFX4021 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4021 is a 4.02 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 operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical and mechanical specifications for seamless board-level substitution.

Key Parameters

Parameter	Value
Resistance	4.02 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 is determined by strict equivalence across the following parameters: resistance value (4.02 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 (RoHS3, REACH Unaffected, EAR99).

Direct Substitutes maintain all electrical and mechanical specifications identical to the MCR03EZPFX4021, including AEC-Q200 automotive qualification. These parts are interchangeable without design modification.

Similar Substitutes meet all core electrical parameters and package requirements but differ in specific features (such as moisture resistance designation) or automotive qualification status. These parts are functionally compatible for applications where the specific feature difference is not a design requirement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory (Pcs)
MCR03EZPFX4021	Rohm Semiconductor	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	870
CRCW06034K02FKEA	Vishay Dale	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	62548
CRCW06034K02FKEB	Vishay Dale	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	49891
ERJ-3EKF4021V	Panasonic Electronic Components	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	5200
RMCF0603FT4K02	Stackpole Electronics Inc	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	146330
CR0603-FX-4021ELF	Bourns Inc.	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	170803
RC0603FR-074K02L	YAGEO	4.02 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	25300

Engineering Selection Recommendations

Primary Recommendation: RMCF0603FT4K02 (Stackpole Electronics Inc) This part is the optimal substitute, offering full AEC-Q200 automotive qualification, active product status, and the highest inventory availability (146,330 pcs). All electrical and mechanical parameters match the MCR03EZPFX4021 exactly.

Secondary Recommendation: CRCW06034K02FKEA (Vishay Dale) This direct substitute maintains complete specification equivalence with AEC-Q200 rating and active product status. Inventory availability is substantial (62,548 pcs), supporting production continuity.

Alternative Recommendation: ERJ-3EKF4021V (Panasonic Electronic Components) This part provides full AEC-Q200 compliance and active status. While inventory is lower (5,200 pcs), it remains a valid direct substitute for applications requiring Panasonic sourcing.

Conditional Recommendation: CR0603-FX-4021ELF (Bourns Inc.) and RC0603FR-074K02L (YAGEO) These parts meet all core electrical specifications and package requirements but lack AEC-Q200 automotive qualification. They are suitable only for non-automotive applications or where automotive qualification is not a design requirement. Both maintain active product status with strong inventory levels.

Frequently Asked Questions (FAQ)

Q: Can CRCW06034K02FKEA be used as a direct replacement for MCR03EZPFX4021? A: Yes. CRCW06034K02FKEA is a direct substitute with identical resistance (4.02 kOhms), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), operating range (-55°C to 155°C), and AEC-Q200 automotive qualification. No design modification is required.

Q: What is the difference between direct and similar substitutes? A: Direct substitutes maintain all electrical and mechanical specifications including AEC-Q200 automotive rating. Similar substitutes meet core electrical parameters and package requirements but may lack specific automotive qualification or feature designations. Selection depends on application requirements.

Q: Are CR0603-FX-4021ELF and RC0603FR-074K02L suitable for automotive applications? A: These parts lack AEC-Q200 automotive qualification. They are suitable only for non-automotive applications. For automotive designs, select from parts with confirmed AEC-Q200 rating: CRCW06034K02FKEA, CRCW06034K02FKEB, ERJ-3EKF4021V, or RMCF0603FT4K02.

Q: Do all substitutes have identical physical dimensions? A: All substitutes use the 0603 (1608 Metric) package. Minor dimensional variations exist within standard tolerances (length 0.061" to 0.063", width 0.031" to 0.033", height 0.020" to 0.022"). These variations are within PCB design tolerances and do not affect board-level compatibility.

Q: Which substitute has the best inventory availability? A: RMCF0603FT4K02 (Stackpole Electronics Inc) offers the highest inventory at 146,330 pcs, followed by CR0603-FX-4021ELF (Bourns Inc.) at 170,803 pcs. For automotive-qualified parts, RMCF0603FT4K02 is the optimal choice.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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