MCR03EZPFX51R0 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX51R0 is a 51 Ohm ±1% thick film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Rohm Semiconductor, this component meets AEC-Q200 automotive qualification standards and operates across -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and supply chain reliability.

Key Parameters

Parameter	Value
Resistance	51 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 ~ 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: 51 Ohms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

All identified substitute parts meet these criteria. Dimensional variations within supplier specifications (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm) remain within standard PCB assembly tolerances and do not affect functional compatibility.

Parameter Comparison

Manufacturer	Part Number	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp (°C)	AEC-Q200	RoHS3	Product Status
Rohm Semiconductor	MCR03EZPFX51R0	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	Yes	Yes	Discontinued
Vishay Dale	CRCW060351R0FKEA	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	Yes	Yes	Active
Panasonic Electronic Components	ERJ-3EKF51R0V	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	Yes	Yes	Active
Stackpole Electronics Inc	RMCF0603FT51R0	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	Yes	Yes	Active
YAGEO	AC0603FR-0751RL	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	Yes	Yes	Active
Bourns Inc.	CR0603-FX-51R0ELF	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	No	Yes	Active
YAGEO	RC0603FR-0751RL	51 Ω	±1%	0.1	0603	±100ppm/°C	-55 ~ 155	No	Yes	Active

Engineering Selection Recommendations

For applications requiring AEC-Q200 automotive qualification, select from CRCW060351R0FKEA (Vishay Dale), ERJ-3EKF51R0V (Panasonic), RMCF0603FT51R0 (Stackpole), or AC0603FR-0751RL (YAGEO). All four parts maintain full automotive compliance and RoHS3 certification with active product status and established supply availability.

CR0603-FX-51R0ELF (Bourns) and RC0603FR-0751RL (YAGEO) are functionally equivalent in electrical and thermal performance but lack AEC-Q200 certification. These alternatives are suitable only for non-automotive applications or where automotive qualification is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different dimensions? A: Yes. Dimensional variations among the listed substitutes (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm) fall within standard PCB assembly tolerances and do not affect electrical performance or board-level compatibility.

Q: What is the difference between AEC-Q200 and non-AEC-Q200 parts? A: AEC-Q200 certification indicates the part has passed automotive-grade reliability testing including thermal cycling, moisture resistance, and failure rate validation. Use AEC-Q200 parts for automotive applications; non-certified parts are restricted to consumer or industrial applications.

Q: Are all substitutes available in the same packaging format? A: The listed substitutes are supplied in either Cut Tape (CT) & Digi-Reel or Tape & Reel (TR) formats. Verify packaging compatibility with your procurement and assembly processes before selection.

Q: Does tolerance affect substitutability? A: All listed parts maintain ±1% tolerance matching the original MCR03EZPFX51R0. Tolerance is a critical substitution parameter; parts with different tolerance ratings are not equivalent.

Q: Can I substitute based on inventory availability alone? A: No. Electrical parameters, package specifications, and compliance certifications must match the design requirements first. Inventory availability is a secondary consideration after confirming functional equivalence.

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