MCR18ERTJ331 Equivalent & Substitute Parts

Part Overview

The MCR18ERTJ331 is a 330 Ohm ±5% 0.25W (1/4W) thick film chip resistor in 1206 (3216 Metric) surface mount package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The MCR series represents a standard general-purpose resistor line with basic electrical specifications suitable for general industrial and consumer applications. Equivalent and substitute parts maintain the same resistance value, tolerance, power rating, and package footprint while offering improved availability, enhanced specifications, or automotive-grade certifications.

Key Parameters

Parameter	Value
Resistance	330 Ohms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package / Case	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Primary Substitution Criteria (Must Match):

Resistance value: 330 Ohms
Package / Case: 1206 (3216 Metric)
Composition: Thick Film
Operating temperature range: -55°C ~ 155°C minimum
RoHS3 compliance

Secondary Substitution Parameters (Allowable Variations):

Tolerance: ±5% (direct equivalent) or ±1% (upgraded tolerance)
Power rating: 0.25W (direct equivalent), 0.5W (upgraded), or 0.75W (upgraded)
Temperature coefficient: ±200ppm/°C (direct equivalent) or ±100ppm/°C (upgraded)
Certifications: AEC-Q200 automotive qualification (optional enhancement)
Product status: Active preferred; Not For New Designs acceptable for legacy applications

Substitute parts are grouped into two categories: Direct equivalents (matching all primary and secondary parameters) and Upgrade options (enhanced specifications while maintaining core functionality).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	AEC-Q200	Product Status
MCR18ERTJ331	Rohm Semiconductor	330 Ω	±5%	0.25	±200	1206	No	Discontinued
ESR18EZPJ331	Rohm Semiconductor	330 Ω	±5%	0.5	±200	1206	Yes	Active
KTR18EZPF3300	Rohm Semiconductor	330 Ω	±1%	0.25	±100	1206	Yes	Active
KTR18EZPJ331	Rohm Semiconductor	330 Ω	±5%	0.25	±200	1206	Yes	Active
CRCW1206330RJNEAC	Vishay Dale	330 Ω	±5%	0.25	±200	1206	No	Active
ERJ-8GEYJ331V	Panasonic Electronic Components	330 Ω	±5%	0.25	±200	1206	Yes	Not For New Designs
RMCF1206JG330R	Stackpole Electronics Inc	330 Ω	±5%	0.25	±200	1206	Yes	Active
RMCF1206JT330R	Stackpole Electronics Inc	330 Ω	±5%	0.25	±200	1206	Yes	Active
CRCW1206330RJNEAHP	Vishay Dale	330 Ω	±5%	0.75	±200	1206	Yes	Active
CRG1206F330R	TE Connectivity Passive Product	330 Ω	±1%	0.25	±100	1206	No	Active
ERJ-8ENF3300V	Panasonic Electronic Components	330 Ω	±1%	0.25	±100	1206	Yes	Not For New Designs

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): CRCW1206330RJNEAC (Vishay Dale) provides the closest functional match with identical resistance, tolerance, power rating, and temperature coefficient. This part is currently active and widely available with 151,527 units in stock, making it the primary recommendation for direct replacement in non-automotive applications.

Automotive-Grade Direct Equivalents: For applications requiring AEC-Q200 certification, RMCF1206JT330R (Stackpole Electronics Inc) and RMCF1206JG330R (Stackpole Electronics Inc) are direct functional equivalents with automotive qualification. RMCF1206JT330R offers exceptional availability with 480,413 units in stock. KTR18EZPJ331 (Rohm Semiconductor) provides an alternative automotive-qualified direct equivalent from the original manufacturer.

Upgraded Specifications (Enhanced Performance): ESR18EZPJ331 (Rohm Semiconductor) upgrades the power rating to 0.5W while maintaining all other parameters, providing increased thermal margin. KTR18EZPF3300 and CRG1206F330R improve tolerance to ±1% and reduce temperature coefficient to ±100ppm/°C, suitable for precision applications. CRCW1206330RJNEAHP (Vishay Dale) increases power rating to 0.75W with automotive certification for high-stress environments.

Legacy Alternatives (Not For New Designs): ERJ-8GEYJ331V and ERJ-8ENF3300V (Panasonic Electronic Components) are functionally compatible but marked as Not For New Designs. These parts remain available for legacy system maintenance and repair.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the original MCR18ERTJ331? A: Yes. Parts rated 0.5W or 0.75W are electrically compatible and provide additional thermal margin. The higher power rating does not affect circuit operation when the original 0.25W rating was adequate. Physical dimensions remain within 1206 package specifications.

Q: What is the difference between ±5% and ±1% tolerance parts? A: Tolerance specifies the maximum deviation from the nominal 330 Ohm value. ±5% allows ±16.5 Ohms variation; ±1% allows ±3.3 Ohms variation. Use ±1% parts in precision circuits requiring tighter resistance control. Both are functionally interchangeable in general applications.

Q: Are AEC-Q200 certified parts required for my application? A: AEC-Q200 certification is mandatory for automotive applications subject to automotive qualification standards. For industrial, consumer, or general-purpose applications, non-certified parts are acceptable. Certified parts offer enhanced reliability testing and traceability.

Q: Will substitute parts fit the same PCB footprint? A: All listed substitutes use the 1206 (3216 Metric) package with identical land pattern requirements. Physical dimensions vary slightly (length 0.120" to 0.126", width 0.061" to 0.063", height 0.026" to 0.028"), but these variations are within standard PCB design tolerances and reflow process capabilities.

Q: Why is the MCR18ERTJ331 discontinued? A: The original part is discontinued at DiGi Electronics. Equivalent alternatives from multiple manufacturers (Vishay Dale, Stackpole Electronics, Panasonic, TE Connectivity) provide superior availability and active product status, making substitution practical and recommended.

Q: Can I mix different substitute part manufacturers on the same PCB? A: Yes. All listed substitutes meet identical electrical specifications and package requirements. Mixed sourcing is acceptable for production flexibility and supply chain resilience.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message