MCR18EZPF4321 Equivalent & Substitute Parts

Part Overview

The MCR18EZPF4321 is a 4.32 kOhms ±1% 0.25W chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This component is designed for automotive applications with AEC-Q200 qualification and thick film composition. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Resistance	4.32 kOhms
Tolerance	±1%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 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 for the MCR18EZPF4321 is determined by strict equivalence across the following parameters:

Resistance value: 4.32 kOhms
Tolerance: ±1%
Power rating: 0.25W (1/4W)
Package: 1206 (3216 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS compliance: ROHS3
Moisture sensitivity: MSL 1

All substitute parts listed meet these electrical and mechanical specifications. Differences in physical dimensions (height, length, width) and product status are noted but do not prevent functional substitution when these core parameters align.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op. Temp Range	AEC-Q200	RoHS3	Product Status	Inventory
MCR18EZPF4321	Rohm Semiconductor	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	Discontinued	1118 Pcs
CR1206-FX-4321ELF	Bourns Inc.	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	No	Yes	Active	49690 Pcs
CRCW12064K32FKEA	Vishay Dale	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	Active	32144 Pcs
ERJ-8ENF4321V	Panasonic Electronic Components	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	Not For New Designs	137406 Pcs
RMCF1206FT4K32	Stackpole Electronics Inc	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	Yes	Yes	Active	2391 Pcs
RC1206FR-074K32L	YAGEO	4.32 kΩ	±1%	0.25	1206	±100ppm/°C	-55°C ~ 155°C	No	Yes	Active	31117 Pcs

Engineering Selection Recommendations

For Automotive Applications (AEC-Q200 Required): CRCW12064K32FKEA (Vishay Dale) and RMCF1206FT4K32 (Stackpole Electronics Inc) are active production parts with AEC-Q200 qualification, matching the original MCR18EZPF4321 automotive specification.

For General Industrial Applications: CR1206-FX-4321ELF (Bourns Inc.) and RC1206FR-074K32L (YAGEO) are active production alternatives with full RoHS3 compliance. These parts do not carry AEC-Q200 rating but meet all electrical and mechanical parameters.

Avoid for New Designs: ERJ-8ENF4321V (Panasonic Electronic Components) carries "Not For New Designs" status despite high inventory availability and AEC-Q200 qualification. This designation indicates the manufacturer is phasing out this product line.

All listed substitutes are ROHS3 compliant with MSL 1 rating and identical operating temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can I use CR1206-FX-4321ELF as a direct replacement for MCR18EZPF4321 in automotive circuits?

A: CR1206-FX-4321ELF meets all electrical specifications (4.32 kΩ, ±1%, 0.25W, 1206 package, ±100ppm/°C, -55°C ~ 155°C). However, it lacks AEC-Q200 automotive qualification. Use only in non-automotive applications or where automotive qualification is not contractually required.

Q: What is the difference between AEC-Q200 and non-AEC-Q200 parts in this list?

A: AEC-Q200 certification indicates the part meets automotive industry reliability and quality standards. MCR18EZPF4321, CRCW12064K32FKEA, ERJ-8ENF4321V, and RMCF1206FT4K32 carry this rating. CR1206-FX-4321ELF and RC1206FR-074K32L do not. Selection depends on application requirements.

Q: Are there physical dimension differences between these substitutes?

A: All parts use the 1206 (3216 Metric) package with identical length (0.126" / 3.20mm) and width (0.063" / 1.60mm). Height varies slightly: MCR18EZPF4321 (0.65mm), CR1206-FX-4321ELF (0.75mm), CRCW12064K32FKEA (0.60mm), ERJ-8ENF4321V (0.70mm), RMCF1206FT4K32 (0.70mm), RC1206FR-074K32L (0.65mm). These variations do not affect PCB assembly compatibility.

Q: Which substitute has the best inventory availability?

A: ERJ-8ENF4321V has the highest inventory (137406 Pcs), followed by CR1206-FX-4321ELF (49690 Pcs) and RC1206FR-074K32L (31117 Pcs). However, ERJ-8ENF4321V is marked "Not For New Designs," limiting its suitability for long-term production.

Q: Do all substitutes have the same moisture sensitivity rating?

A: Yes. All parts listed carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity concerns during storage and handling.

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