MCR03EZPFX18R0 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX18R0 is an 18 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	18 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 for the MCR03EZPFX18R0 is determined by strict equivalence across the following parameters: resistance value (18 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 compliance certifications (ROHS3, AEC-Q200 where applicable).

Substitute parts are categorized as follows:

Direct Substitutes maintain all electrical and mechanical specifications identical to the main part, including AEC-Q200 automotive qualification. These parts are MCR03ERTF18R0 (Rohm Semiconductor), CRCW060318R0FKEA (Vishay Dale), ERJ-3EKF18R0V (Panasonic Electronic Components), and RMCF0603FT18R0 (Stackpole Electronics Inc).

Similar Substitutes meet all core electrical parameters and package requirements but may differ in secondary features such as moisture resistance designation. These parts are AC0603FR-0718RL (YAGEO), CR0603-FX-18R0ELF (Bourns Inc.), and RC0603FR-0718RL (YAGEO).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory (Pcs)
MCR03EZPFX18R0	Rohm Semiconductor	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	1045
MCR03ERTF18R0	Rohm Semiconductor	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued	1109
CRCW060318R0FKEA	Vishay Dale	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	60697
ERJ-3EKF18R0V	Panasonic Electronic Components	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	47766
RMCF0603FT18R0	Stackpole Electronics Inc	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	61453
AC0603FR-0718RL	YAGEO	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	6184
CR0603-FX-18R0ELF	Bourns Inc.	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	59087
RC0603FR-0718RL	YAGEO	18 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	4200

Engineering Selection Recommendations

For applications requiring strict AEC-Q200 automotive compliance, select from the following active parts: CRCW060318R0FKEA (Vishay Dale), ERJ-3EKF18R0V (Panasonic Electronic Components), or RMCF0603FT18R0 (Stackpole Electronics Inc). All three maintain full electrical equivalence to the original MCR03EZPFX18R0 and carry active product status with substantial inventory availability.

For non-automotive applications or where AEC-Q200 certification is not mandatory, AC0603FR-0718RL, CR0603-FX-18R0ELF, and RC0603FR-0718RL provide functional equivalence with active product status. The MCR03ERTF18R0 (Rohm Semiconductor) is electrically equivalent but discontinued, making it unsuitable for new designs despite available inventory.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX18R0 be replaced with any of the listed substitutes without circuit redesign?

A: Yes. All listed substitutes maintain identical resistance (18 Ohms), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). Direct PCB substitution is possible without circuit modifications.

Q: What is the difference between Direct Substitutes and Similar Substitutes?

A: Direct Substitutes (MCR03ERTF18R0, CRCW060318R0FKEA, ERJ-3EKF18R0V, RMCF0603FT18R0) carry AEC-Q200 automotive certification matching the original part. Similar Substitutes (AC0603FR-0718RL, CR0603-FX-18R0ELF, RC0603FR-0718RL) meet all electrical and mechanical requirements but lack explicit AEC-Q200 designation. For automotive applications, Direct Substitutes are preferred.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within tolerance. The MCR03EZPFX18R0 measures 0.063" L × 0.031" W (1.60mm × 0.80mm) with 0.022" (0.55mm) maximum seated height. CRCW060318R0FKEA measures 0.061" L × 0.033" W (1.55mm × 0.85mm) with 0.020" (0.50mm) maximum seated height. RMCF0603FT18R0 measures 0.061" L × 0.031" W (1.55mm × 0.80mm) with 0.022" (0.55mm) maximum seated height. All variations remain within 0603 package specification and do not affect PCB assembly compatibility.

Q: Which substitute offers the best availability?

A: RMCF0603FT18R0 (Stackpole Electronics Inc) and CRCW060318R0FKEA (Vishay Dale) offer the highest inventory levels at 61,453 and 60,697 pieces respectively, both with active product status.

Q: Is moisture resistance a critical factor for substitution?

A: Moisture resistance is a secondary feature. The original MCR03EZPFX18R0 and all substitutes carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity concerns. Parts designated as "Moisture Resistant" (AC0603FR-0718RL, CR0603-FX-18R0ELF, RC0603FR-0718RL) provide additional protection but are not required for functional equivalence.

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