MCR03EZPFX6490 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX6490 is a 649 Ohm ±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 functionally equivalent alternatives from active product lines or alternative manufacturers that maintain identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Resistance Value	649 Ohms
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	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (649 Ohms), 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 compliance certifications (ROHS3, REACH Unaffected, EAR99).

Substitute parts are grouped into two categories:

Direct Substitutes maintain all electrical and mechanical parameters identical to the MCR03EZPFX6490, including AEC-Q200 automotive qualification. These parts are interchangeable without design modification.

Similar Substitutes maintain all core electrical specifications and package dimensions but may differ in secondary features (such as anti-sulfur or moisture-resistant coatings) or lack explicit AEC-Q200 certification. These parts are electrically and mechanically compatible but require design review for application-specific requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status
MCR03EZPFX6490	Rohm Semiconductor	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued
MCR03ERTF6490	Rohm Semiconductor	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued
TRR03EZPF6490	Rohm Semiconductor	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Obsolete
CRCW0603649RFKEA	Vishay Dale	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
ERJ-3EKF6490V	Panasonic Electronic Components	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
RMCF0603FT649R	Stackpole Electronics Inc	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
CR0603-FX-6490ELF	Bourns Inc.	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active
RC0603FR-07649RL	YAGEO	649 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from active product alternatives: CRCW0603649RFKEA (Vishay Dale), ERJ-3EKF6490V (Panasonic Electronic Components), or RMCF0603FT649R (Stackpole Electronics Inc). All three maintain full electrical equivalence and automotive compliance certification.

For non-automotive applications or where AEC-Q200 certification is not required, CR0603-FX-6490ELF (Bourns Inc.) and RC0603FR-07649RL (YAGEO) provide active product alternatives with identical electrical specifications and 0603 package compatibility.

Rohm Semiconductor alternatives MCR03ERTF6490 and TRR03EZPF6490 remain electrically equivalent but are discontinued or obsolete, limiting long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can MCR03ERTF6490 replace MCR03EZPFX6490 in automotive applications?

A: MCR03ERTF6490 maintains identical electrical specifications (649 Ω, ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). However, it lacks explicit AEC-Q200 certification listed in the provided specifications. For automotive designs requiring AEC-Q200 compliance, use CRCW0603649RFKEA, ERJ-3EKF6490V, or RMCF0603FT649R instead.

Q: Are there dimensional differences between substitute parts?

A: All substitute parts use the 0603 (1608 Metric) package. Dimensional variations exist within tolerance: CRCW0603649RFKEA measures 0.061" L × 0.033" W (1.55mm × 0.85mm) with 0.020" max height, while MCR03EZPFX6490 measures 0.063" L × 0.031" W (1.60mm × 0.80mm) with 0.022" max height. These variations remain within standard 0603 package specifications and do not affect PCB layout compatibility.

Q: What is the difference between TRR03EZPF6490 and MCR03EZPFX6490?

A: TRR03EZPF6490 is from Rohm's TRR series with anti-sulfur thick film composition, while MCR03EZPFX6490 is from the MCR series with standard thick film. Both share identical electrical parameters and operating temperature range. TRR03EZPF6490 is obsolete; use active alternatives for new designs.

Q: Which substitute offers the best long-term availability?

A: ERJ-3EKF6490V (Panasonic) and RMCF0603FT649R (Stackpole) are active products with high inventory levels (90,138 and 41,683 units respectively) and AEC-Q200 certification, providing optimal supply continuity.

Q: Can CR0603-FX-6490ELF be used in automotive designs?

A: CR0603-FX-6490ELF maintains all electrical specifications and 0603 package compatibility. However, it lacks AEC-Q200 certification and features moisture-resistant coating rather than automotive-grade qualification. Use only in non-automotive applications or where automotive certification is not required.

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