MCR03EZPFX1213 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX1213 is a 121 kOhms ±1% 0.1W chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This automotive-grade thick film resistor meets AEC-Q200 qualification standards 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	121 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 to 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX1213 is determined by strict equivalence across the following parameters:

Resistance value: 121 kOhms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Termination count: 2
RoHS compliance: ROHS3

Substitute parts are classified into two categories:

Direct Substitutes meet all electrical and mechanical parameters with automotive AEC-Q200 certification: CRCW0603121KFKEA, CRCW0603121KFKEB, ERJ-3EKF1213V, and RMCF0603FT121K.

Similar Substitutes meet all core electrical and mechanical parameters but feature moisture-resistant construction without explicit AEC-Q200 automotive certification: CR0603-FX-1213ELF and RC0603FR-07121KL.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power	Package	Temp Coeff	Op. Temp Range	AEC-Q200	Product Status	Inventory
Rohm Semiconductor	MCR03EZPFX1213	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	1012 Pcs
Vishay Dale	CRCW0603121KFKEA	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	17021 Pcs
Vishay Dale	CRCW0603121KFKEB	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	20660 Pcs
Panasonic Electronic Components	ERJ-3EKF1213V	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	84147 Pcs
Stackpole Electronics Inc	RMCF0603FT121K	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	30910 Pcs
Bourns Inc.	CR0603-FX-1213ELF	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active	39757 Pcs
YAGEO	RC0603FR-07121KL	121 kOhms	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active	488743 Pcs

Engineering Selection Recommendations

For applications requiring automotive AEC-Q200 certification, select from the direct substitutes: CRCW0603121KFKEA (Vishay Dale, active status), ERJ-3EKF1213V (Panasonic, active status with highest inventory), or RMCF0603FT121K (Stackpole Electronics, active status).

CRCW0603121KFKEB (Vishay Dale) is discontinued but remains available in inventory and maintains full AEC-Q200 compliance.

For applications where automotive certification is not required, CR0603-FX-1213ELF (Bourns) and RC0603FR-07121KL (YAGEO) provide equivalent electrical and mechanical performance with moisture-resistant construction. RC0603FR-07121KL offers the largest available inventory.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MCR03EZPFX1213 with any of these parts in automotive applications?

A: Direct substitutes (CRCW0603121KFKEA, CRCW0603121KFKEB, ERJ-3EKF1213V, RMCF0603FT121K) carry AEC-Q200 certification and are suitable for automotive applications. CR0603-FX-1213ELF and RC0603FR-07121KL lack explicit AEC-Q200 certification and should be evaluated against specific automotive requirements.

Q: Are there dimensional differences between the main part and substitutes?

A: Minor dimensional variations exist within tolerance. The MCR03EZPFX1213, ERJ-3EKF1213V, CR0603-FX-1213ELF, and RC0603FR-07121KL share identical dimensions (0.063" L x 0.031" W, 0.022" max height). CRCW0603121KFKEA and CRCW0603121KFKEB are slightly smaller (0.061" L x 0.033" W, 0.020" max height). All fit the 0603 package footprint.

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

A: Direct substitutes carry AEC-Q200 automotive qualification. Similar substitutes feature moisture-resistant construction but lack explicit automotive certification. Selection depends on application requirements.

Q: Which substitute has the best availability?

A: RC0603FR-07121KL (YAGEO) has the highest inventory at 488,743 pieces. ERJ-3EKF1213V (Panasonic) offers 84,147 pieces with AEC-Q200 certification.

Q: Are all substitutes RoHS compliant?

A: All listed substitutes are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating.

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