MCR03EZPFX4122 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4122 is a 41.2 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, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Resistance	41.2 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 MCR03EZPFX4122 is determined by strict equivalence across the following parameters:

Resistance value: 41.2 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.1W / 1/10W (exact match required)
Package: 0603 (1608 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)
Moisture sensitivity: MSL 1 (exact match required)

Parts are categorized as Direct Substitutes when all parameters match exactly. Parts designated as Similar are functionally equivalent but may have minor feature differences (such as moisture resistance designation) that do not affect core electrical performance in standard applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	AEC-Q200	Product Status	Inventory
MCR03EZPFX4122	Rohm Semiconductor	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	Yes	Discontinued	748 Pcs
MCR03ERTF4122	Rohm Semiconductor	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	No	Discontinued	906 Pcs
CRCW060341K2FKEA	Vishay Dale	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	Yes	Active	30467 Pcs
ERJ-3EKF4122V	Panasonic Electronic Components	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	Yes	Active	888494 Pcs
RMCF0603FT41K2	Stackpole Electronics Inc	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	Yes	Active	53741 Pcs
CR0603-FX-4122ELF	Bourns Inc.	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	No	Active	107398 Pcs
RC0603FR-0741K2L	YAGEO	41.2 kΩ	±1%	0.1	0603	±100ppm/°C	-55~155°C	No	Active	5227 Pcs

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from the following active parts with full automotive certification:

CRCW060341K2FKEA (Vishay Dale): Active status with 30467 units in stock. Full AEC-Q200 compliance.
ERJ-3EKF4122V (Panasonic Electronic Components): Active status with highest inventory availability at 888494 units. Full AEC-Q200 compliance.
RMCF0603FT41K2 (Stackpole Electronics Inc): Active status with 53741 units in stock. Full AEC-Q200 compliance.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-4122ELF (Bourns Inc.) and RC0603FR-0741K2L (YAGEO) are active alternatives with moisture-resistant thick film composition and adequate inventory.

MCR03ERTF4122 (Rohm Semiconductor) is a direct electrical equivalent but is discontinued, making it unsuitable for new procurement despite available inventory.

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX4122 be replaced with any of the listed substitutes?

A: All listed parts meet the core electrical specifications (41.2 kΩ, ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). However, if AEC-Q200 automotive certification is required for your application, use only CRCW060341K2FKEA, ERJ-3EKF4122V, or RMCF0603FT41K2.

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

A: Direct substitutes match all electrical and mechanical parameters exactly. Similar substitutes have equivalent electrical performance but may differ in secondary features such as moisture resistance designation. Both categories are electrically interchangeable for the specified parameters.

Q: Does package size vary among substitutes?

A: All substitutes use the 0603 (1608 Metric) package. Physical dimensions are nominally equivalent across manufacturers, with minor variations within standard tolerances (length 1.55-1.60mm, width 0.80-0.85mm, height 0.50-0.55mm seated).

Q: Which substitute has the best availability?

A: ERJ-3EKF4122V (Panasonic) offers the highest inventory at 888494 units and maintains active product status with full AEC-Q200 certification.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original MCR03EZPFX4122 specifications.

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