MCR03EZPFX1242 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX1242 is a 12.4 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 specifications 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 or alternative manufacturers that maintain identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Resistance Value	12.4 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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (12.4 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 (ROHS3, REACH Unaffected, EAR99). All identified substitute parts meet these criteria. Packaging format (tape & reel, cut tape, or digi-reel) does not affect electrical or mechanical compatibility and represents a logistics consideration only.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Composition	Temp Coeff	Operating Temp	AEC-Q200	Product Status
MCR03EZPFX1242	Rohm Semiconductor	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued
TRR03EZPF1242	Rohm Semiconductor	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	No	Obsolete
CRCW060312K4FKEA	Vishay Dale	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	Yes	Active
CRCW060312K4FKEB	Vishay Dale	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued
ERJ-3EKF1242V	Panasonic Electronic Components	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	Yes	Active
RMCF0603FT12K4	Stackpole Electronics Inc	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	Yes	Active
CR0603-FX-1242ELF	Bourns Inc.	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	No	Active
RC0603FR-0712K4L	YAGEO	12.4 kOhms	±1%	0.1	0603	Thick Film	±100ppm/°C	-55°C ~ 155°C	No	Active

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from active product status parts: CRCW060312K4FKEA (Vishay Dale), ERJ-3EKF1242V (Panasonic), or RMCF0603FT12K4 (Stackpole Electronics). All three maintain full AEC-Q200 compliance, ROHS3 certification, and unlimited moisture sensitivity rating (MSL 1).

CRCW060312K4FKEA is the preferred primary substitute, offering active product status and equivalent automotive qualification. ERJ-3EKF1242V and RMCF0603FT12K4 provide additional sourcing options with confirmed availability and active manufacturing status.

For non-automotive applications where AEC-Q200 is not required, CR0603-FX-1242ELF (Bourns) and RC0603FR-0712K4L (YAGEO) are functionally equivalent alternatives with active product status. Both maintain identical electrical specifications and 0603 package compatibility.

Discontinued parts (TRR03EZPF1242, CRCW060312K4FKEB) should be avoided for new designs but remain electrically compatible for legacy system repairs where existing inventory is available.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for MCR03EZPFX1242?

A: Yes. All listed substitute parts are electrically and mechanically equivalent. They share identical resistance value (12.4 kOhms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Physical dimensions and termination count are identical across all parts.

Q: Does packaging format (tape & reel vs. cut tape) affect compatibility?

A: No. Packaging format is a supply chain and handling consideration only. It does not affect electrical performance or mechanical fit. Select based on your assembly process requirements.

Q: Which substitute should I choose for automotive applications?

A: For automotive use, select parts with active AEC-Q200 certification: CRCW060312K4FKEA, ERJ-3EKF1242V, or RMCF0603FT12K4. All three are currently in active production and maintain full automotive qualification.

Q: Are there differences in physical dimensions between these parts?

A: Minor dimensional variations exist within the 0603 package specification. 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). These variations remain within standard 0603 tolerances and do not affect PCB layout or assembly compatibility.

Q: What is the difference between parts marked "Active" and "Discontinued"?

A: Active parts are currently manufactured and available from suppliers. Discontinued parts are no longer in production. For new designs, select active status parts to ensure long-term supply availability.

Q: Do all these parts meet RoHS compliance?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the original MCR03EZPFX1242 compliance status.

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