MCR03EZPFX51R1 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX51R1 is a 51.1 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	51.1 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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MCR03EZPFX51R1 is determined by strict equivalence across the following parameters:

Resistance value: 51.1 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 ~ 155°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

Parts are classified into two categories:

Direct Substitutes maintain full automotive AEC-Q200 certification and identical electrical specifications. These include CRCW060351R1FKEA (Vishay Dale), ERJ-3EKF51R1V (Panasonic), and RMCF0603FT51R1 (Stackpole Electronics).

Similar Substitutes meet all electrical and mechanical parameters but feature moisture-resistant composition instead of automotive AEC-Q200 rating. These include CR0603-FX-51R1ELF (Bourns) and RC0603FR-0751R1L (YAGEO).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	AEC-Q200	Product Status	Inventory
MCR03EZPFX51R1	Rohm Semiconductor	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	813 Pcs
CRCW060351R1FKEA	Vishay Dale	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	27617 Pcs
CRCW060351R1FKEB	Vishay Dale	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Discontinued	9735 Pcs
ERJ-3EKF51R1V	Panasonic Electronic Components	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	114776 Pcs
RMCF0603FT51R1	Stackpole Electronics Inc	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	Yes	Active	448094 Pcs
CR0603-FX-51R1ELF	Bourns Inc.	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	77212 Pcs
RC0603FR-0751R1L	YAGEO	51.1 Ω	±1%	0.1	0603	±100ppm/°C	-55°C ~ 155°C	No	Active	224623 Pcs

Engineering Selection Recommendations

For automotive applications requiring AEC-Q200 certification, select from the direct substitutes: CRCW060351R1FKEA, ERJ-3EKF51R1V, or RMCF0603FT51R1. All three maintain full automotive compliance and are currently in active production status with substantial inventory availability.

RMCF0603FT51R1 (Stackpole Electronics) offers the highest inventory level at 448,094 pieces, providing supply chain stability. ERJ-3EKF51R1V (Panasonic) provides 114,776 pieces with active status. CRCW060351R1FKEA (Vishay Dale) is available in 27,617 pieces with active status.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-51R1ELF (Bourns) and RC0603FR-0751R1L (YAGEO) are viable alternatives with moisture-resistant composition and substantial inventory levels of 77,212 and 224,623 pieces respectively.

Frequently Asked Questions (FAQ)

Q: Can I use CR0603-FX-51R1ELF or RC0603FR-0751R1L as direct replacements in automotive applications?

A: These parts meet all electrical and mechanical parameters but lack AEC-Q200 automotive certification. Use only in non-automotive applications or where automotive qualification is not a design requirement.

Q: What is the difference between CRCW060351R1FKEA and CRCW060351R1FKEB?

A: Both are Vishay Dale 51.1 Ohm 0603 resistors with identical electrical specifications. The primary difference is packaging: FKEA is supplied in Cut Tape (CT) & Digi-Reel format, while FKEB is supplied in Tape & Reel (TR) format. FKEA is currently active; FKEB is discontinued.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), matching the original MCR03EZPFX51R1 specifications.

Q: What are the physical dimension differences between substitute parts?

A: All parts conform to 0603 (1608 Metric) package specifications. Minor variations exist in seated height and length/width dimensions within standard tolerances. RMCF0603FT51R1 and ERJ-3EKF51R1V match the original 0.063" L x 0.031" W dimensions. CRCW060351R1FKEA and CRCW060351R1FKEB measure 0.061" L x 0.033" W and 0.063" L x 0.033" W respectively. CR0603-FX-51R1ELF and RC0603FR-0751R1L both measure 0.063" L x 0.031" W.

Q: Which substitute offers the best supply availability?

A: RMCF0603FT51R1 (Stackpole Electronics) provides the highest inventory at 448,094 pieces with active product status, followed by RC0603FR-0751R1L (YAGEO) at 224,623 pieces.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message