MCR03EZPFX6653 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX6653 is a 665 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, necessitating identification of equivalent alternatives from active manufacturers that maintain identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Resistance Value	665 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 to 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MCR03EZPFX6653 is determined by strict equivalence across the following parameters:

Resistance value: 665 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 follows:

Direct Equivalents (Automotive AEC-Q200 rated): CRCW0603665KFKEA (Vishay Dale), ERJ-3EKF6653V (Panasonic Electronic Components), and RMCF0603FT665K (Stackpole Electronics Inc) maintain full automotive qualification and identical electrical specifications.

Similar Equivalents (Moisture Resistant, non-automotive rated): CR0603-FX-6653ELF (Bourns Inc.) and RC0603FR-07665KL (YAGEO) meet all electrical and mechanical parameters but feature moisture-resistant construction without automotive AEC-Q200 certification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory
MCR03EZPFX6653	Rohm Semiconductor	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	1065 Pcs
CRCW0603665KFKEA	Vishay Dale	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	23480 Pcs
ERJ-3EKF6653V	Panasonic Electronic Components	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	59255 Pcs
RMCF0603FT665K	Stackpole Electronics Inc	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	25358 Pcs
CR0603-FX-6653ELF	Bourns Inc.	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	19076 Pcs
RC0603FR-07665KL	YAGEO	665 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	63980 Pcs

Engineering Selection Recommendations

For applications requiring automotive AEC-Q200 compliance, select from the direct equivalent group: CRCW0603665KFKEA, ERJ-3EKF6653V, or RMCF0603FT665K. All three maintain active product status with robust inventory availability and full compliance with ROHS3 and REACH requirements.

ERJ-3EKF6653V (Panasonic) offers the highest inventory level at 59255 pieces, supporting supply chain continuity. CRCW0603665KFKEA (Vishay Dale) and RMCF0603FT665K (Stackpole) provide alternative sources with comparable availability.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-6653ELF (Bourns) and RC0603FR-07665KL (YAGEO) are functionally equivalent with moisture-resistant construction. RC0603FR-07665KL provides the largest inventory reserve at 63980 pieces.

All substitute parts are ROHS3 compliant, MSL 1 rated, and maintain identical electrical performance within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX6653 be directly replaced with CRCW0603665KFKEA?

A: Yes. Both components share identical resistance value (665 kOhms), tolerance (±1%), power rating (0.1W), package (0603), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). Both are AEC-Q200 rated and ROHS3 compliant. Direct substitution is electrically and mechanically valid.

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

A: Direct equivalents (CRCW0603665KFKEA, ERJ-3EKF6653V, RMCF0603FT665K) carry AEC-Q200 automotive certification matching the original MCR03EZPFX6653. Similar equivalents (CR0603-FX-6653ELF, RC0603FR-07665KL) meet all electrical and mechanical specifications but feature moisture-resistant construction without automotive qualification. Selection depends on application requirements.

Q: Are there physical dimension differences between substitute parts?

A: Minor variations exist within tolerance. MCR03EZPFX6653, ERJ-3EKF6653V, CR0603-FX-6653ELF, and RC0603FR-07665KL measure 0.063" L × 0.031" W (1.60mm × 0.80mm). CRCW0603665KFKEA and RMCF0603FT665K measure 0.061" L × 0.033" W (1.55mm × 0.85mm) and 0.061" L × 0.031" W (1.55mm × 0.80mm) respectively. All fit standard 0603 footprints without layout modification.

Q: Which substitute offers the best supply availability?

A: RC0603FR-07665KL (YAGEO) provides the highest inventory at 63980 pieces. For automotive-qualified alternatives, ERJ-3EKF6653V (Panasonic) offers 59255 pieces, followed by RMCF0603FT665K (Stackpole) at 25358 pieces and CRCW0603665KFKEA (Vishay Dale) at 23480 pieces.

Q: Can substitute parts be used in automotive applications?

A: CRCW0603665KFKEA, ERJ-3EKF6653V, and RMCF0603FT665K are AEC-Q200 rated and suitable for automotive use. CR0603-FX-6653ELF and RC0603FR-07665KL lack automotive certification and should be evaluated against specific application requirements before deployment in automotive circuits.

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