MCR03EZPFX4421 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4421 is a 4.42 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	4.42 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MCR03EZPFX4421 is determined by strict equivalence across the following parameters:

Resistance value: 4.42 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)

Substitute parts are classified into two categories:

Direct Substitutes maintain all electrical and mechanical parameters identical to the main part, including automotive AEC-Q200 certification where applicable.

Similar Substitutes meet all core electrical and mechanical requirements but may differ in specific features (such as moisture resistance designation) or lack automotive certification, while maintaining full functional compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory
MCR03EZPFX4421	Rohm Semiconductor	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	728 Pcs
MCR03ERTF4421	Rohm Semiconductor	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Discontinued	1113 Pcs
CRCW06034K42FKEA	Vishay Dale	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	29662 Pcs
ERJ-3EKF4421V	Panasonic Electronic Components	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	109621 Pcs
RMCF0603FT4K42	Stackpole Electronics Inc	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	156277 Pcs
CR0603-FX-4421ELF	Bourns Inc.	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	52356 Pcs
RC0603FR-074K42L	YAGEO	4.42 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	552768 Pcs

Engineering Selection Recommendations

For automotive applications requiring AEC-Q200 certification, select from the following active direct substitutes:

RMCF0603FT4K42 (Stackpole Electronics Inc): Active status with highest inventory availability (156277 Pcs), full AEC-Q200 compliance, and identical electrical and mechanical specifications.
ERJ-3EKF4421V (Panasonic Electronic Components): Active status with substantial inventory (109621 Pcs), full AEC-Q200 compliance, and identical specifications.
CRCW06034K42FKEA (Vishay Dale): Active status with AEC-Q200 compliance and adequate inventory (29662 Pcs).

For non-automotive applications or where AEC-Q200 certification is not required, the following active substitutes provide full electrical and mechanical compatibility:

RC0603FR-074K42L (YAGEO): Highest inventory availability (552768 Pcs), active status, moisture-resistant thick film composition.
CR0603-FX-4421ELF (Bourns Inc.): Active status with moisture-resistant features and adequate inventory (52356 Pcs).

The discontinued Rohm Semiconductor part MCR03ERTF4421 remains available in limited inventory (1113 Pcs) but should not be selected for new designs due to discontinued status.

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX4421 be replaced with any of the listed substitutes?

A: All listed substitutes meet the core electrical and mechanical requirements (4.42 kΩ, ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). Selection depends on application requirements. For automotive applications, use only AEC-Q200 certified parts: CRCW06034K42FKEA, ERJ-3EKF4421V, or RMCF0603FT4K42.

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

A: Direct substitutes maintain all specifications including automotive certification. Similar substitutes meet all electrical and mechanical parameters but lack AEC-Q200 certification or feature different designations (such as moisture resistance). Both are functionally compatible in non-automotive applications.

Q: Are there physical dimension differences between substitutes?

A: All substitutes use the 0603 (1608 Metric) package. Minor dimensional variations exist within standard tolerances: length ranges from 0.061" to 0.063" (1.55mm to 1.60mm), width from 0.031" to 0.033" (0.80mm to 0.85mm), and height from 0.020" to 0.022" (0.50mm to 0.55mm). These variations are within standard PCB design tolerances and do not affect interchangeability.

Q: Which substitute offers the best availability?

A: RC0603FR-074K42L (YAGEO) provides the highest inventory availability at 552768 Pcs. For automotive-grade parts, RMCF0603FT4K42 (Stackpole Electronics Inc) offers the best availability at 156277 Pcs.

Q: Can I use non-AEC-Q200 parts in automotive designs?

A: AEC-Q200 certification is a requirement for automotive applications. Use only CRCW06034K42FKEA, ERJ-3EKF4421V, or RMCF0603FT4K42 for automotive designs. Non-certified parts (CR0603-FX-4421ELF, RC0603FR-074K42L) are suitable only for non-automotive applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitutes are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original MCR03EZPFX4421 specifications.

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