MCR03EZPFX4990 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX4990 is a 499 Ohms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 specifications and operates across -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines or other manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	499 Ohms
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
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 (499 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 categorized as follows:

Direct Equivalents maintain all electrical and mechanical specifications identical to MCR03EZPFX4990. These parts are interchangeable without design modification.

Upgrade Substitutes exceed the original specifications in tolerance or temperature coefficient while maintaining all other parameters, providing enhanced performance characteristics.

Similar Alternatives match all critical electrical parameters and package specifications but may differ in non-critical features such as moisture resistance designation, provided they meet the same compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status
MCR03EZPFX4990	Rohm Semiconductor	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued
MCR03ERTF4990	Rohm Semiconductor	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued
CRCW0603499RFKEA	Vishay Dale	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
CRCW0603499RFKEB	Vishay Dale	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued
ERJ-3EKF4990V	Panasonic Electronic Components	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
RMCF0603FT499R	Stackpole Electronics Inc	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	Yes	Active
CRCW0603499RDHEAP	Vishay Dale	499 Ω	±0.5%	0.1W	0603	±50ppm/°C	-55°C to 155°C	Yes	Active
CR0603-FX-4990ELF	Bourns Inc.	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active
RC0603FR-07499RL	YAGEO	499 Ω	±1%	0.1W	0603	±100ppm/°C	-55°C to 155°C	No	Active

Engineering Selection Recommendations

For AEC-Q200 Automotive Applications: CRCW0603499RFKEA (Vishay Dale), ERJ-3EKF4990V (Panasonic), and RMCF0603FT499R (Stackpole) are direct equivalents with active product status and full AEC-Q200 certification. These parts maintain identical electrical specifications and automotive compliance to MCR03EZPFX4990.

For Enhanced Tolerance Requirements: CRCW0603499RDHEAP (Vishay Dale) provides ±0.5% tolerance and ±50ppm/°C temperature coefficient, exceeding the original ±1% tolerance specification while maintaining AEC-Q200 certification and active availability.

For Non-Automotive Applications: CR0603-FX-4990ELF (Bourns) and RC0603FR-07499RL (YAGEO) meet all electrical and mechanical specifications with active product status. These alternatives lack AEC-Q200 certification but maintain ROHS3 compliance and identical resistance, tolerance, power rating, and package specifications.

Avoid: MCR03ERTF4990 and CRCW0603499RFKEB are discontinued products. While MCR03ERTF4990 maintains Rohm Semiconductor sourcing, it lacks AEC-Q200 certification. Both present supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX4990 be replaced with CRCW0603499RFKEA in automotive applications?

A: Yes. CRCW0603499RFKEA is a direct equivalent meeting all specifications: 499 Ohms ±1%, 0.1W, 0603 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 certification. It is currently in active production.

Q: What is the difference between CRCW0603499RFKEA and CRCW0603499RDHEAP?

A: CRCW0603499RDHEAP provides tighter tolerance (±0.5% versus ±1%) and lower temperature coefficient (±50ppm/°C versus ±100ppm/°C). Both maintain 0603 package, 0.1W power rating, and AEC-Q200 certification. CRCW0603499RDHEAP is an upgrade option for applications requiring higher precision.

Q: Are CR0603-FX-4990ELF and RC0603FR-07499RL suitable replacements for automotive designs?

A: These parts match all electrical and mechanical specifications but lack AEC-Q200 certification. They are suitable only for non-automotive applications. For automotive designs, use CRCW0603499RFKEA, ERJ-3EKF4990V, or RMCF0603FT499R.

Q: Does package size differ between substitute parts?

A: All listed substitutes use 0603 (1608 Metric) package. Physical dimensions vary slightly between manufacturers (length 1.55mm to 1.60mm, width 0.80mm to 0.85mm, height 0.50mm to 0.55mm), but all are within 0603 specification tolerances and are mechanically interchangeable on standard PCB layouts.

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

A: CRCW0603499RFKEA (Vishay Dale) and ERJ-3EKF4990V (Panasonic) have the highest inventory levels (198,781 and 166,876 units respectively) and active product status, indicating strong long-term supply continuity.

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