MCR03EZPFX4123 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4123 is a 412 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	412 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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX4123 is determined by strict equivalence across the following parameters: resistance value (412 kOhms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and compliance certifications (AEC-Q200, ROHS3, REACH Unaffected).

Substitute parts are grouped into two categories:

Direct Substitutes maintain full AEC-Q200 automotive qualification and identical electrical specifications. These parts are interchangeable without design modification.

Similar Substitutes meet all electrical and mechanical specifications but feature moisture-resistant composition instead of automotive AEC-Q200 rating. These parts are suitable for applications where automotive qualification is not mandatory.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Operating Temp	AEC-Q200	Status	Inventory
MCR03EZPFX4123	Rohm Semiconductor	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	703 Pcs
CRCW0603412KFKEA	Vishay Dale	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	34,555 Pcs
CRCW0603412KFKEB	Vishay Dale	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	20,852 Pcs
ERJ-3EKF4123V	Panasonic Electronic Components	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	57,856 Pcs
RMCF0603FG412K	Stackpole Electronics Inc	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	11,161 Pcs
RMCF0603FT412K	Stackpole Electronics Inc	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	102,617 Pcs
CR0603-FX-4123ELF	Bourns Inc.	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active	19,073 Pcs
RC0603FR-07412KL	YAGEO	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active	193,639 Pcs
RC1608F4123CS	Samsung Electro-Mechanics	412 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active	907 Pcs

Engineering Selection Recommendations

For Automotive Applications Requiring AEC-Q200 Compliance:

Select from active direct substitutes: CRCW0603412KFKEA (Vishay Dale), ERJ-3EKF4123V (Panasonic), RMCF0603FG412K (Stackpole), or RMCF0603FT412K (Stackpole). All maintain full AEC-Q200 automotive qualification and ROHS3 compliance. RMCF0603FT412K offers the highest inventory availability at 102,617 pieces. ERJ-3EKF4123V provides 57,856 pieces with active product status.

For Non-Automotive Applications:

Similar substitutes CR0603-FX-4123ELF (Bourns), RC0603FR-07412KL (YAGEO), and RC1608F4123CS (Samsung) meet all electrical specifications with moisture-resistant composition. RC0603FR-07412KL has the largest inventory at 193,639 pieces and active status.

Packaging Considerations:

CRCW0603412KFKEA is available in Cut Tape (CT) & Digi-Reel packaging. All other direct substitutes and similar parts are supplied in Tape & Reel (TR) format, except RC1608F4123CS which is available in Cut Tape (CT).

Frequently Asked Questions (FAQ)

Q: Can I use a similar substitute part without AEC-Q200 rating in an automotive application?

A: No. If your design requires AEC-Q200 compliance, use only direct substitutes with automotive qualification: CRCW0603412KFKEA, CRCW0603412KFKEB, ERJ-3EKF4123V, RMCF0603FG412K, or RMCF0603FT412K.

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

A: Direct substitutes carry AEC-Q200 automotive qualification identical to the original MCR03EZPFX4123. Similar substitutes feature moisture-resistant composition but lack automotive certification. Both groups share identical electrical parameters and 0603 package specifications.

Q: Are there physical dimension differences between substitute parts?

A: Minor variations exist within tolerance. 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). All parts fit standard 0603 footprints.

Q: Which substitute has the best availability?

A: RC0603FR-07412KL (YAGEO) has 193,639 pieces in stock. For AEC-Q200 qualified parts, RMCF0603FT412K (Stackpole) offers 102,617 pieces.

Q: Do all substitutes have the same moisture sensitivity level?

A: Yes. All listed parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All direct and similar substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's environmental compliance.

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