MCR03EZPFX6343 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX6343 is a 634 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	634 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX6343 is determined by strict equivalence across the following parameters:

Resistance value: 634 kOhms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
RoHS compliance: ROHS3 Compliant
Moisture sensitivity: MSL 1

Substitute parts are categorized as Direct Manufacturer equivalents (identical electrical and mechanical specifications) or Similar parts (matching core parameters with minor feature variations). All listed substitutes meet the mandatory electrical and mechanical requirements for direct replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	AEC-Q200	Product Status
MCR03EZPFX6343	Rohm Semiconductor	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued
MCR03ERTF6343	Rohm Semiconductor	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued
CRCW0603634KFKEA	Vishay Dale	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
ERJ-3EKF6343V	Panasonic Electronic Components	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
RMCF0603FT634K	Stackpole Electronics Inc	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
CR0603-FX-6343ELF	Bourns Inc.	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active
RC0603FR-07634KL	YAGEO	634 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from active parts with explicit AEC-Q200 rating: CRCW0603634KFKEA (Vishay Dale), ERJ-3EKF6343V (Panasonic Electronic Components), or RMCF0603FT634K (Stackpole Electronics Inc). These parts maintain full automotive compliance and are currently in active production status.

For non-automotive applications or where AEC-Q200 is not mandatory, CR0603-FX-6343ELF (Bourns Inc.) and RC0603FR-07634KL (YAGEO) provide equivalent electrical performance with active product status and higher inventory availability.

MCR03ERTF6343 (Rohm Semiconductor) is a direct Rohm equivalent but is discontinued; prioritize active alternatives unless specific design constraints require this variant.

Frequently Asked Questions (FAQ)

Q: Can I substitute MCR03EZPFX6343 with any of the listed parts?

A: All listed parts meet the core electrical and mechanical requirements (634 kOhms, ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). Selection depends on your application requirements. For automotive applications, use only parts with AEC-Q200 rating.

Q: What is the difference between Direct Manufacturer and Similar substitutes?

A: Direct Manufacturer substitutes (MCR03ERTF6343) are from the same manufacturer with identical specifications. Similar substitutes (CR0603-FX-6343ELF, RC0603FR-07634KL) are from different manufacturers but meet all mandatory electrical and mechanical parameters. Similar parts may have minor feature differences such as moisture resistance designation rather than AEC-Q200 rating.

Q: Are all substitutes pin-compatible?

A: Yes. All listed substitutes use the 0603 (1608 Metric) package with 2 terminations, ensuring mechanical and electrical compatibility in PCB layouts designed for the MCR03EZPFX6343.

Q: Which substitute has the best availability?

A: RC0603FR-07634KL (YAGEO) has the highest inventory at 222,396 pieces. ERJ-3EKF6343V (Panasonic) has 147,569 pieces. CRCW0603634KFKEA (Vishay Dale) has 21,380 pieces.

Q: Does the packaging format matter for substitution?

A: Packaging format (Cut Tape, Tape & Reel, Digi-Reel) affects handling and storage but does not impact electrical or mechanical compatibility. Select based on your assembly process requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original part's environmental compliance profile.

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