MCR03EZPFX3742 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX3742 is a 37.4 kOhms ±1% thick film chip resistor rated at 0.1W (1/10W) in 0603 (1608 Metric) surface mount package. This Rohm Semiconductor component is designed for automotive applications with AEC-Q200 qualification and operates across -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	37.4 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 for the MCR03EZPFX3742 is determined by strict equivalence across the following parameters:

Resistance Value: 37.4 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: -55°C ~ 155°C (exact match required)
RoHS Compliance: ROHS3 Compliant (exact match required)
Moisture Sensitivity: MSL 1 (exact match required)

Substitute parts are categorized as follows:

Direct Manufacturer Substitutes (identical electrical and mechanical specifications, different packaging or series designation):

MCR03ERTF3742 (Rohm Semiconductor)
CRCW060337K4FKEA (Vishay Dale)
ERJ-3EKF3742V (Panasonic Electronic Components)
RMCF0603FT37K4 (Stackpole Electronics Inc)

Similar Substitutes (meet all core electrical parameters with minor feature variations):

CR0603-FX-3742ELF (Bourns Inc.)
RC0603FR-0737K4L (YAGEO)

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	AEC-Q200	Product Status	Inventory
MCR03EZPFX3742	Rohm Semiconductor	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	963 Pcs
MCR03ERTF3742	Rohm Semiconductor	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Discontinued	1165 Pcs
CRCW060337K4FKEA	Vishay Dale	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	27410 Pcs
ERJ-3EKF3742V	Panasonic Electronic Components	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	37610 Pcs
RMCF0603FT37K4	Stackpole Electronics Inc	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	7042 Pcs
CR0603-FX-3742ELF	Bourns Inc.	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	39731 Pcs
RC0603FR-0737K4L	YAGEO	37.4 kΩ	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	47300 Pcs

Engineering Selection Recommendations

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

CRCW060337K4FKEA (Vishay Dale): Active status with AEC-Q200 certification and 27,410 units in stock. Suitable for automotive applications requiring qualified components.
ERJ-3EKF3742V (Panasonic Electronic Components): Active status with AEC-Q200 certification and highest inventory (37,610 units). Recommended for high-volume production requiring automotive-grade reliability.
RMCF0603FT37K4 (Stackpole Electronics Inc): Active status with AEC-Q200 certification and 7,042 units in stock. Suitable for automotive applications with moderate volume requirements.

For applications where AEC-Q200 certification is not required:

CR0603-FX-3742ELF (Bourns Inc.): Active status with moisture-resistant features and 39,731 units in stock. Suitable for non-automotive applications.
RC0603FR-0737K4L (YAGEO): Active status with moisture-resistant features and highest inventory (47,300 units). Suitable for high-volume non-automotive applications.

All substitute parts maintain identical electrical specifications (37.4 kΩ ±1%, 0.1W, ±100ppm/°C, -55°C ~ 155°C) and are ROHS3 compliant with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can MCR03ERTF3742 directly replace MCR03EZPFX3742?

A: Yes. Both parts are from Rohm Semiconductor with identical electrical and mechanical specifications (37.4 kΩ ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C ~ 155°C). The difference is packaging format (Cut Tape & Digi-Reel vs. standard packaging). Both are discontinued at DiGi Electronics.

Q: Which substitute is best for automotive applications?

A: CRCW060337K4FKEA, ERJ-3EKF3742V, and RMCF0603FT37K4 all carry AEC-Q200 certification. ERJ-3EKF3742V offers the highest inventory (37,610 units) and is recommended for volume production.

Q: Are there differences in physical dimensions between substitutes?

A: Minor variations exist. CRCW060337K4FKEA measures 0.061" L x 0.033" W with 0.020" max height. MCR03EZPFX3742, ERJ-3EKF3742V, and RC0603FR-0737K4L measure 0.063" L x 0.031" W with 0.022" max height. RMCF0603FT37K4 measures 0.061" L x 0.031" W with 0.022" max height. All fit within 0603 (1608 Metric) package specification and are mechanically compatible.

Q: What is the difference between "Direct Manufacturer Substitutes" and "Similar Substitutes"?

A: Direct Manufacturer Substitutes meet all electrical and mechanical parameters identically. Similar Substitutes meet all core electrical parameters (resistance, tolerance, power, temperature range) but lack AEC-Q200 automotive certification, featuring moisture-resistant properties instead.

Q: Can I use CR0603-FX-3742ELF or RC0603FR-0737K4L in automotive applications?

A: These parts lack AEC-Q200 certification. Use only in non-automotive applications or where automotive qualification is not required. For automotive use, select from CRCW060337K4FKEA, ERJ-3EKF3742V, or RMCF0603FT37K4.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original MCR03EZPFX3742 specification.

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