MCR03EZPFX8661 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX8661 is an 8.66 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 that maintain identical electrical and mechanical specifications for seamless circuit board integration.

Key Parameters

Parameter	Specification
Resistance Value	8.66 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
Automotive Rating	AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MCR03EZPFX8661 is determined by strict equivalence across the following critical parameters:

Resistance value: 8.66 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 to 155°C (exact match required)
RoHS compliance: ROHS3 Compliant (exact match required)
Moisture sensitivity: MSL 1 (exact match required)

Substitute parts are classified into two categories:

Direct Equivalents (Automotive AEC-Q200 Rated): CRCW06038K66FKEA (Vishay Dale), ERJ-3EKF8661V (Panasonic Electronic Components), and RMCF0603FT8K66 (Stackpole Electronics Inc) maintain full AEC-Q200 automotive certification identical to the original part.

Similar Equivalents (Moisture Resistant, Non-Automotive Rated): CR0603-FX-8661ELF (Bourns Inc.) and RC0603FR-078K66L (YAGEO) meet all electrical and mechanical specifications but feature moisture-resistant construction instead of automotive AEC-Q200 certification.

Parameter Comparison

Parameter	MCR03EZPFX8661 (Rohm)	CRCW06038K66FKEA (Vishay Dale)	ERJ-3EKF8661V (Panasonic)	RMCF0603FT8K66 (Stackpole)	CR0603-FX-8661ELF (Bourns)	RC0603FR-078K66L (YAGEO)
Resistance	8.66 kOhms	8.66 kOhms	8.66 kOhms	8.66 kOhms	8.66 kOhms	8.66 kOhms
Tolerance	±1%	±1%	±1%	±1%	±1%	±1%
Power Rating	0.1W	0.1W	0.1W	0.1W	0.1W	0.1W
Package	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C
Automotive Rating	AEC-Q200	AEC-Q200	AEC-Q200	AEC-Q200	Not Rated	Not Rated
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For applications requiring automotive AEC-Q200 certification, select from the direct equivalent group: CRCW06038K66FKEA (Vishay Dale), ERJ-3EKF8661V (Panasonic Electronic Components), or RMCF0603FT8K66 (Stackpole Electronics Inc). All three maintain identical electrical specifications, operating temperature range, and automotive compliance ratings.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-8661ELF (Bourns Inc.) and RC0603FR-078K66L (YAGEO) provide functionally equivalent alternatives with moisture-resistant construction and full ROHS3 compliance.

All substitute parts are currently in active production status with substantial inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use a non-automotive rated substitute in an automotive application? A: No. Applications requiring AEC-Q200 certification must use CRCW06038K66FKEA, ERJ-3EKF8661V, or RMCF0603FT8K66. CR0603-FX-8661ELF and RC0603FR-078K66L lack automotive qualification and are not suitable for AEC-Q200 applications.

Q: Are all substitute parts pin-compatible with the original MCR03EZPFX8661? A: Yes. All substitute parts use the 0603 (1608 Metric) package with identical two-termination configuration and footprint compatibility.

Q: What is the difference between direct equivalents and similar equivalents? A: Direct equivalents (Vishay Dale, Panasonic, Stackpole) carry AEC-Q200 automotive certification identical to the original part. Similar equivalents (Bourns, YAGEO) feature moisture-resistant construction but lack automotive certification.

Q: Do all substitute parts meet the same temperature coefficient specification? A: Yes. All substitute parts maintain ±100ppm/°C temperature coefficient and -55°C to 155°C operating temperature range.

Q: Are there any dimensional differences between the original and substitute parts? A: Minor dimensional variations exist within the 0603 package specification. The original MCR03EZPFX8661 and ERJ-3EKF8661V measure 0.063" L x 0.031" W (1.60mm x 0.80mm). CRCW06038K66FKEA measures 0.061" L x 0.033" W (1.55mm x 0.85mm). RMCF0603FT8K66 measures 0.061" L x 0.031" W (1.55mm x 0.80mm). All variations remain within standard 0603 package tolerances and do not affect PCB footprint compatibility.

Q: Which substitute offers the highest inventory availability? A: RMCF0603FT8K66 (Stackpole Electronics Inc) offers 221,450 pieces in stock, followed by RC0603FR-078K66L (YAGEO) with 220,251 pieces and ERJ-3EKF8661V (Panasonic) with 109,563 pieces.

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