MCR03EZPFX21R0 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX21R0 is a 21 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, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Resistance	21 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MCR03EZPFX21R0 is determined by strict equivalence across the following parameters:

Resistance value: 21 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
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

All substitute parts listed meet these core electrical and mechanical specifications. Variations in physical dimensions (length, width, height) within standard tolerances and differences in packaging format (Cut Tape vs. Tape & Reel) do not affect functional equivalence. Automotive AEC-Q200 certification is present on the main part and most direct substitutes, providing additional qualification for automotive applications.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	AEC-Q200	Product Status	Inventory (Pcs)
MCR03EZPFX21R0	Rohm Semiconductor	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Discontinued	1033
MCR03ERTF21R0	Rohm Semiconductor	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Discontinued	1939
CRCW060321R0FKEA	Vishay Dale	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	3825
ERJ-3EKF21R0V	Panasonic Electronic Components	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	78169
RMCF0603FT21R0	Stackpole Electronics Inc	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	Yes	Active	4988
RC0603FR-0721RL	YAGEO	21 Ω	±1%	0.1	0603	±100ppm/°C	-55°C to 155°C	No	Active	18708

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from CRCW060321R0FKEA (Vishay Dale), ERJ-3EKF21R0V (Panasonic), or RMCF0603FT21R0 (Stackpole Electronics). All three are currently active products with AEC-Q200 certification matching the original MCR03EZPFX21R0 specification.

For non-automotive applications or where AEC-Q200 is not required, RC0603FR-0721RL (YAGEO) and MCR03ERTF21R0 (Rohm Semiconductor) are functionally equivalent alternatives. RC0603FR-0721RL offers the highest current inventory availability at 18,708 pieces.

MCR03ERTF21R0 is a Rohm Semiconductor variant of the discontinued MCR03EZPFX21R0, maintaining the same manufacturer lineage and electrical specifications, though without explicit AEC-Q200 designation in the provided data.

Frequently Asked Questions (FAQ)

Q: Can I use RC0603FR-0721RL as a direct replacement for MCR03EZPFX21R0 in automotive applications?

A: RC0603FR-0721RL meets all core electrical and mechanical specifications (21 Ω, ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). However, it lacks AEC-Q200 certification. Use only if your application does not mandate automotive qualification.

Q: What is the difference between the packaging formats listed (Cut Tape vs. Tape & Reel)?

A: Cut Tape (CT) and Tape & Reel (TR) are supply formats that do not affect component performance. Cut Tape is suitable for smaller quantities and manual assembly, while Tape & Reel is optimized for automated pick-and-place equipment. Electrical and mechanical specifications remain identical.

Q: Are there dimensional differences between substitute parts?

A: Minor dimensional variations exist within standard tolerances. The main part and substitutes all conform to 0603 (1608 Metric) package specifications. Length ranges from 0.061" to 0.063", width from 0.031" to 0.033", and height from 0.020" to 0.022". These variations are within acceptable PCB design tolerances and do not affect functionality.

Q: Which substitute has the best availability?

A: ERJ-3EKF21R0V (Panasonic) offers the highest inventory at 78,169 pieces, followed by RC0603FR-0721RL (YAGEO) at 18,708 pieces. Both are active products with immediate availability.

Q: Do all substitutes have the same RoHS and REACH compliance?

A: All listed parts are ROHS3 Compliant and REACH Unaffected, matching the original MCR03EZPFX21R0 specification.

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