MCR10EZPF4021 Equivalent & Substitute Parts

Part Overview

The MCR10EZPF4021 is a 4.02 kOhms ±1% 0.125W (1/8W) chip resistor in 0805 (2012 Metric) package manufactured by Rohm Semiconductor. This automotive-grade thick film resistor meets AEC-Q200 qualification and operates across -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines that maintain the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	4.02 kOhms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on substitution compatibility:

Direct Substitutes (Identical Specifications): Parts maintaining all electrical parameters (4.02 kOhms, ±1% tolerance, 0.125W power rating, 0805 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, AEC-Q200 automotive qualification, ROHS3 compliance, MSL 1). These parts are pin-compatible and functionally interchangeable without circuit modification.

Upgrade Substitutes (Enhanced Power Rating): Parts with identical resistance, tolerance, package, temperature coefficient, and operating range, but with increased power dissipation capability (0.4W or 0.5W). These provide additional thermal margin and pulse withstanding capability while maintaining backward compatibility in 0805 footprint applications.

Upgrade Substitutes (Enhanced Features): Parts with identical core specifications but additional features such as high voltage capability or moisture resistance, providing enhanced performance in specific application environments.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	AEC-Q200	RoHS Status	Product Status
MCR10EZPF4021	Rohm Semiconductor	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Discontinued
ESR10EZPF4021	Rohm Semiconductor	4.02 kΩ	±1%	0.4	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
KTR10EZPF4021	Rohm Semiconductor	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
CRCW08054K02FKEA	Vishay Dale	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
CRCW08054K02FKTA	Vishay Dale	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	RoHS Non-compliant	Active
ERJ-6ENF4021V	Panasonic Electronic Components	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
RC0805FR-074K02L	YAGEO	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	No	ROHS3	Active
RMCF0805FT4K02	Stackpole Electronics Inc	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
AC0805FR-074K02L	YAGEO	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
CRCW08054K02FKEAHP	Vishay Dale	4.02 kΩ	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active
RCS08054K02FKEA	Vishay Dale	4.02 kΩ	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	Yes	ROHS3	Active

Engineering Selection Recommendations

For direct replacement of MCR10EZPF4021 in active production or repair applications, select from parts maintaining identical electrical specifications and AEC-Q200 automotive qualification with ROHS3 compliance:

Primary Recommendations (Direct Electrical Equivalents):

KTR10EZPF4021 (Rohm Semiconductor): Same manufacturer family, identical specifications, active product status, ROHS3 compliant, AEC-Q200 rated
CRCW08054K02FKEA (Vishay Dale): Established automotive supplier, identical specifications, high inventory availability, ROHS3 compliant, AEC-Q200 rated
ERJ-6ENF4021V (Panasonic Electronic Components): Automotive-qualified, identical specifications, highest inventory availability, ROHS3 compliant, AEC-Q200 rated
RMCF0805FT4K02 (Stackpole Electronics Inc): Automotive-qualified, identical specifications, ROHS3 compliant, AEC-Q200 rated
AC0805FR-074K02L (YAGEO): Automotive-qualified with moisture resistance enhancement, identical electrical specifications, ROHS3 compliant, AEC-Q200 rated

Secondary Recommendations (Enhanced Power Rating):

ESR10EZPF4021 (Rohm Semiconductor): Same manufacturer, 0.4W rating provides thermal margin, identical package and electrical parameters, active status, ROHS3 compliant
CRCW08054K02FKEAHP (Vishay Dale): 0.5W pulse-withstanding variant, identical package and electrical parameters, ROHS3 compliant, AEC-Q200 rated
RCS08054K02FKEA (Vishay Dale): 0.5W pulse-withstanding variant, identical package and electrical parameters, ROHS3 compliant, AEC-Q200 rated

Not Recommended:

CRCW08054K02FKTA (Vishay Dale): RoHS non-compliant status conflicts with ROHS3 requirement of original part
RC0805FR-074K02L (YAGEO): Lacks AEC-Q200 automotive qualification present in original specification

Frequently Asked Questions (FAQ)

Q: Can I use a higher power-rated resistor as a substitute? A: Yes. Parts with 0.4W or 0.5W ratings (ESR10EZPF4021, CRCW08054K02FKEAHP, RCS08054K02FKEA) are electrically and mechanically compatible with the 0.125W MCR10EZPF4021 in 0805 package applications. Higher power ratings provide additional thermal dissipation capability without affecting circuit function. All dimensions and electrical parameters remain identical.

Q: What is the significance of AEC-Q200 qualification? A: AEC-Q200 certification indicates the resistor meets automotive industry reliability standards for passive components. For automotive applications, substitutes must maintain this qualification. Direct equivalents and upgrade options listed maintain AEC-Q200 status.

Q: Are there packaging differences between substitute parts? A: All listed substitutes use identical 0805 (2012 Metric) package with 2 terminations. Physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) are standardized across all options. Height variations (0.020" to 0.028") are within typical PCB assembly tolerances and do not affect footprint compatibility.

Q: Why is CRCW08054K02FKTA not recommended despite identical electrical specifications? A: CRCW08054K02FKTA carries RoHS non-compliant status and REACH Affected designation, conflicting with the original MCR10EZPF4021 ROHS3 compliance requirement. This creates regulatory and supply chain compliance issues in applications requiring RoHS certification.

Q: What is the difference between direct and upgrade substitutes? A: Direct substitutes (KTR10EZPF4021, CRCW08054K02FKEA, ERJ-6ENF4021V, RMCF0805FT4K02, AC0805FR-074K02L) maintain all original specifications including 0.125W power rating. Upgrade substitutes (ESR10EZPF4021, CRCW08054K02FKEAHP, RCS08054K02FKEA) provide enhanced 0.4W or 0.5W power ratings while preserving all other parameters, offering improved thermal performance in the same package footprint.

Q: Can I substitute RC0805FR-074K02L for MCR10EZPF4021? A: RC0805FR-074K02L matches all electrical parameters and RoHS compliance but lacks AEC-Q200 automotive qualification. Use only in non-automotive applications where automotive certification is not required.

Q: Which substitute offers the best inventory availability? A: ERJ-6ENF4021V (Panasonic) shows highest inventory at 134,286 pieces. CRCW08054K02FKEA (Vishay Dale) provides 36,993 pieces. Both are suitable for high-volume production requirements.

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