MCR03EZPFX5493 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX5493 is a 549 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	549 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
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: 549 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Power rating: 0.1W / 1/10W (exact match required)
Package: 0603 (1608 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)
Moisture sensitivity: MSL 1 (exact match required)

All substitute parts listed below meet these criteria. Direct substitutes maintain identical electrical and mechanical specifications. Similar substitutes meet all core parameters but may differ in secondary features such as automotive qualification or moisture resistance designation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	AEC-Q200	Product Status
MCR03EZPFX5493	Rohm Semiconductor	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued
MCR03ERTF5493	Rohm Semiconductor	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Discontinued
CRCW0603549KFKEA	Vishay Dale	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active
ERJ-3EKF5493V	Panasonic Electronic Components	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active
RMCF0603FT549K	Stackpole Electronics Inc	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active
CR0603-FX-5493ELF	Bourns Inc.	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active
RC0603FR-07549KL	YAGEO	549 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active

Engineering Selection Recommendations

For applications requiring automotive AEC-Q200 qualification, select from active parts: CRCW0603549KFKEA (Vishay Dale), ERJ-3EKF5493V (Panasonic Electronic Components), or RMCF0603FT549K (Stackpole Electronics Inc). All three maintain full AEC-Q200 compliance and are currently in active production with substantial inventory availability.

For general-purpose applications where automotive qualification is not mandatory, CR0603-FX-5493ELF (Bourns Inc.) and RC0603FR-07549KL (YAGEO) provide equivalent electrical performance with moisture-resistant thick film construction. Both are active products with high inventory levels.

MCR03ERTF5493 (Rohm Semiconductor) is a direct electrical equivalent but is discontinued, making it unsuitable for new designs requiring long-term supply assurance.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical thermal and electrical specifications to the original MCR03EZPFX5493.

Frequently Asked Questions (FAQ)

Q: Can MCR03ERTF5493 replace MCR03EZPFX5493? A: MCR03ERTF5493 is electrically and mechanically equivalent but lacks AEC-Q200 automotive qualification. Both parts are discontinued. For new designs, select an active substitute.

Q: What is the difference between direct and similar substitutes? A: Direct substitutes (CRCW0603549KFKEA, ERJ-3EKF5493V, RMCF0603FT549K) maintain AEC-Q200 automotive qualification. Similar substitutes (CR0603-FX-5493ELF, RC0603FR-07549KL) meet all core electrical and mechanical parameters but feature moisture-resistant construction instead of automotive qualification.

Q: Are all substitutes pin-compatible? A: Yes. All listed substitutes use the 0603 (1608 Metric) package with identical footprint, lead spacing, and two-terminal configuration. PCB layout modifications are not required.

Q: Which substitute has the highest inventory availability? A: RC0603FR-07549KL (YAGEO) has 87,536 pieces in stock. CRCW0603549KFKEA (Vishay Dale) has 42,149 pieces. ERJ-3EKF5493V (Panasonic) has 48,957 pieces.

Q: Do all substitutes meet the same temperature range? A: Yes. All substitutes operate across -55°C to 155°C with ±100ppm/°C temperature coefficient, matching the original MCR03EZPFX5493 specification.

Q: Is RoHS compliance maintained across all substitutes? A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

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