MCR03EZPFX6491 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX6491 is a 6.49 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 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 board-level substitution.

Key Parameters

Parameter	Value
Resistance	6.49 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature	-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 MCR03EZPFX6491 is determined by strict equivalence across the following parameters: resistance value (6.49 kOhms), 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 automotive qualification (AEC-Q200). Parts are classified into two categories:

Direct Substitutes maintain all electrical and mechanical specifications with identical or compatible packaging formats. These parts are interchangeable without design modification.

Similar Substitutes meet all core electrical specifications and package dimensions but may differ in secondary features such as moisture resistance classification or packaging format (Cut Tape vs. Tape & Reel). These parts require verification of procurement and assembly compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory
MCR03EZPFX6491	Rohm Semiconductor	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	747 Pcs
CRCW06036K49FKEA	Vishay Dale	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	51,278 Pcs
CRCW06036K49FKEB	Vishay Dale	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	35,172 Pcs
ERJ-3EKF6491V	Panasonic Electronic Components	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	162,445 Pcs
RMCF0603FT6K49	Stackpole Electronics Inc	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	100,154 Pcs
CR0603-FX-6491ELF	Bourns Inc.	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	83,949 Pcs
RC0603FR-076K49L	YAGEO	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	10,100 Pcs
RC1608F6491CS	Samsung Electro-Mechanics	6.49 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	921 Pcs
ERJ-3EKF6341V	Panasonic Electronic Components	6.34 kOhms	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	100,293 Pcs

Engineering Selection Recommendations

For direct replacement of the discontinued MCR03EZPFX6491, select from parts maintaining full AEC-Q200 automotive qualification with active product status: ERJ-3EKF6491V (Panasonic), RMCF0603FT6K49 (Stackpole), or CRCW06036K49FKEA (Vishay Dale). These three options provide identical electrical specifications, automotive certification, and high inventory availability.

CRCW06036K49FKEA is the preferred primary substitute, offering the highest inventory level (51,278 units) and active product status with Tape & Reel packaging suitable for automated assembly.

ERJ-3EKF6491V serves as the secondary substitute with the largest available inventory (162,445 units) and confirmed AEC-Q200 compliance.

RMCF0603FT6K49 provides a tertiary option with active status and substantial inventory (100,154 units).

For applications where automotive qualification is not mandatory, CR0603-FX-6491ELF (Bourns), RC0603FR-076K49L (YAGEO), and RC1608F6491CS (Samsung) are electrically equivalent alternatives with moisture-resistant thick film composition and active product status.

ERJ-3EKF6341V differs in resistance value (6.34 kOhms vs. 6.34 kOhms) and is not suitable as a direct substitute unless circuit design permits the 2.3% resistance deviation.

Frequently Asked Questions (FAQ)

Q: Can I use ERJ-3EKF6341V as a substitute for MCR03EZPFX6491?

A: No. ERJ-3EKF6341V has a resistance value of 6.34 kOhms, which deviates 2.3% from the required 6.49 kOhms specification. This part does not meet the electrical equivalence requirement and will alter circuit performance.

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

A: Direct substitutes maintain all electrical and mechanical specifications including AEC-Q200 automotive qualification. Similar substitutes meet electrical specifications and package dimensions but lack automotive certification or have different packaging formats. Selection depends on application requirements.

Q: Are Tape & Reel and Cut Tape packaging interchangeable?

A: Both packaging formats contain identical components. Tape & Reel (TR) is optimized for high-volume automated assembly, while Cut Tape (CT) is suitable for lower-volume or manual assembly. Verify your procurement and assembly process compatibility before selection.

Q: Why is CRCW06036K49FKEA recommended as the primary substitute?

A: CRCW06036K49FKEA maintains full electrical equivalence (6.49 kOhms ±1%, 0.1W, AEC-Q200), has active product status ensuring long-term availability, offers the highest inventory level among direct substitutes (51,278 units), and uses standard Tape & Reel packaging for automated assembly.

Q: Do all substitute parts have the same moisture sensitivity level?

A: Yes. All listed parts maintain MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture protection requirements during storage or handling.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.

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