MCR03EZPFX43R0 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX43R0 is a 43 Ohm ±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	43 Ohms
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 to 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 (43 Ohms), 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 RoHS3 compliance. All identified substitutes meet these core electrical and mechanical specifications.

Substitutes are grouped into two categories:

Direct Substitutes maintain full AEC-Q200 automotive qualification: MCR03ERTF43R0 (Rohm Semiconductor), CRCW060343R0FKEA (Vishay Dale), ERJ-3EKF43R0V (Panasonic Electronic Components), and RMCF0603FT43R0 (Stackpole Electronics Inc).

Similar Substitutes meet all electrical and mechanical parameters but lack explicit AEC-Q200 automotive rating or include additional features: AC0603FR-0743RL (YAGEO), CR0603-FX-43R0ELF (Bourns Inc.), and RC0603FR-0743RL (YAGEO).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory (Pcs)
MCR03EZPFX43R0	Rohm Semiconductor	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	1063
MCR03ERTF43R0	Rohm Semiconductor	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Discontinued	2240
CRCW060343R0FKEA	Vishay Dale	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	19849
ERJ-3EKF43R0V	Panasonic Electronic Components	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	227290
RMCF0603FT43R0	Stackpole Electronics Inc	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	79112
AC0603FR-0743RL	YAGEO	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	20945
CR0603-FX-43R0ELF	Bourns Inc.	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	20245
RC0603FR-0743RL	YAGEO	43 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	511838

Engineering Selection Recommendations

For automotive applications requiring AEC-Q200 compliance, select from the direct substitute group: CRCW060343R0FKEA (Vishay Dale), ERJ-3EKF43R0V (Panasonic Electronic Components), or RMCF0603FT43R0 (Stackpole Electronics Inc). All three are currently in active production status with substantial inventory availability.

ERJ-3EKF43R0V offers the highest inventory level (227,290 pcs) and represents the most readily available option. CRCW060343R0FKEA and RMCF0603FT43R0 provide alternative sources with 19,849 and 79,112 pcs respectively.

For non-automotive applications where AEC-Q200 certification is not required, similar substitutes AC0603FR-0743RL, CR0603-FX-43R0ELF, and RC0603FR-0743RL are electrically and mechanically equivalent. RC0603FR-0743RL provides exceptional inventory depth (511,838 pcs).

All substitutes maintain ROHS3 compliance and MSL 1 rating consistent with the original MCR03EZPFX43R0 specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part not rated for AEC-Q200 in an automotive application?

A: No. If your application requires AEC-Q200 automotive qualification, use only direct substitutes: CRCW060343R0FKEA, ERJ-3EKF43R0V, or RMCF0603FT43R0. Similar substitutes lack this certification.

Q: Are all substitutes mechanically compatible with the 0603 package footprint?

A: Yes. All listed substitutes use the 0603 (1608 Metric) package. Minor dimensional variations exist (height ranges 0.020" to 0.022", length ranges 0.061" to 0.063"), but these fall within standard PCB assembly tolerances and do not affect footprint compatibility.

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

A: Direct substitutes maintain full AEC-Q200 automotive qualification. Similar substitutes meet all electrical and mechanical parameters (43 Ohms ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C) but do not carry explicit AEC-Q200 rating. Selection depends on application requirements.

Q: Why is MCR03ERTF43R0 listed as a substitute if it lacks AEC-Q200 rating?

A: MCR03ERTF43R0 is a direct Rohm Semiconductor equivalent with identical electrical specifications and packaging. It is discontinued at DiGi Electronics but available in inventory. Use only if AEC-Q200 certification is not required.

Q: Which substitute offers the best supply availability?

A: RC0603FR-0743RL (YAGEO) provides the highest inventory at 511,838 pcs. For AEC-Q200 applications, ERJ-3EKF43R0V (Panasonic) offers 227,290 pcs.

Q: Are moisture-resistant variants functionally equivalent?

A: Yes. AC0603FR-0743RL and CR0603-FX-43R0ELF include moisture-resistant features in addition to standard thick film composition. These features do not affect electrical performance and provide enhanced environmental protection. Both are electrically equivalent to the original part.

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