MCR18ERTJ511 Equivalent & Substitute Parts

Part Overview

The MCR18ERTJ511 is a 510 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 part meets ROHS3 compliance and operates across -55°C to 155°C with a temperature coefficient of ±200ppm/°C. Equivalent and substitute parts are available from multiple manufacturers with matching or enhanced electrical and mechanical specifications.

Key Parameters

Parameter	Value
Resistance	510 Ohms
Tolerance	±5%
Power Rating	0.25W (1/4W)
Package	1206 (3216 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C to 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for MCR18ERTJ511 is determined by the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 510 Ohms
Package: 1206 (3216 Metric)
Composition: Thick Film
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance
MSL rating: 1 (Unlimited)

Allowable Variations:

Tolerance: ±5% (original) to ±1% (tighter tolerance acceptable as upgrade)
Power rating: 0.25W (original) to higher ratings (0.5W, 0.667W, 0.75W acceptable as upgrades)
Temperature coefficient: ±200ppm/°C (original) to ±100ppm/°C (tighter coefficient acceptable as upgrade)
Manufacturer: Any qualified supplier
Product status: Active preferred; Not For New Designs acceptable for direct equivalents

Substitute parts are categorized as:

Direct equivalents: Identical electrical and mechanical specifications
Upgrade substitutes: Enhanced specifications (lower tolerance, higher power rating, lower temperature coefficient, automotive qualification)

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Product Status	AEC-Q200
MCR18ERTJ511	Rohm Semiconductor	510 Ω	±5%	0.25	±200	1206	Discontinued	No
ESR18EZPJ511	Rohm Semiconductor	510 Ω	±5%	0.5	±200	1206	Active	Yes
KTR18EZPF5100	Rohm Semiconductor	510 Ω	±1%	0.25	±100	1206	Active	Yes
ERJ-8GEYJ511V	Panasonic Electronic Components	510 Ω	±5%	0.25	±200	1206	Not For New Designs	Yes
RMCF1206JT510R	Stackpole Electronics Inc	510 Ω	±5%	0.25	±200	1206	Active	Yes
CRCW1206510RJNEAHP	Vishay Dale	510 Ω	±5%	0.75	±200	1206	Active	Yes
ERJ-8ENF5100V	Panasonic Electronic Components	510 Ω	±1%	0.25	±100	1206	Not For New Designs	Yes
ERJ-P08J511V	Panasonic Electronic Components	510 Ω	±5%	0.667	±200	1206	Active	Yes
RC1206FR-07510RL	YAGEO	510 Ω	±1%	0.25	±100	1206	Active	No
RC1206JR-07510RL	YAGEO	510 Ω	±5%	0.25	±100	1206	Active	No
RC3216F511CS	Samsung Electro-Mechanics	510 Ω	±1%	0.25	±100	1206	Active	No

Engineering Selection Recommendations

For Active Production (Recommended):

RMCF1206JT510R (Stackpole Electronics Inc) provides direct electrical and mechanical equivalence with active product status and AEC-Q200 automotive qualification. This part maintains the original 0.25W power rating, ±5% tolerance, and ±200ppm/°C temperature coefficient while offering superior availability and supply chain stability.

For Enhanced Tolerance Requirements:

KTR18EZPF5100 (Rohm Semiconductor) or RC1206FR-07510RL (YAGEO) upgrade tolerance to ±1% and reduce temperature coefficient to ±100ppm/°C while maintaining 0.25W power rating and 1206 package. KTR18EZPF5100 includes AEC-Q200 qualification; RC1206FR-07510RL does not.

For Higher Power Dissipation:

CRCW1206510RJNEAHP (Vishay Dale) increases power rating to 0.75W with pulse withstanding capability and AEC-Q200 qualification, maintaining ±5% tolerance and 1206 package. ERJ-P08J511V (Panasonic) offers intermediate 0.667W rating with active status and AEC-Q200 qualification.

For Rohm Semiconductor Continuity:

ESR18EZPJ511 (Rohm Semiconductor) maintains manufacturer continuity with 0.5W power upgrade, active status, and AEC-Q200 qualification.

Legacy Alternatives (Not For New Designs):

ERJ-8GEYJ511V and ERJ-8ENF5100V (Panasonic) are marked Not For New Designs and should be avoided for new circuit designs despite high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating than the original MCR18ERTJ511?

A: Yes. Higher power ratings (0.5W, 0.667W, 0.75W) are acceptable substitutes because they provide greater thermal margin. The 1206 package dimensions remain identical, and all substitute parts maintain the same operating temperature range and resistance value. Verify PCB layout accommodates the substitute part's physical dimensions if specified.

Q: What is the difference between ±5% and ±1% tolerance substitutes?

A: Tolerance specifies the manufacturing accuracy of the resistance value. ±1% tolerance (tighter) is a direct upgrade from ±5% tolerance (original). Parts with ±1% tolerance are suitable for applications requiring higher precision. Both tolerances are electrically compatible; ±1% parts simply provide better accuracy.

Q: Are YAGEO RC1206 series parts direct equivalents?

A: RC1206JR-07510RL and RC1206FR-07510RL are electrically equivalent but lack AEC-Q200 automotive qualification. They are suitable for non-automotive applications. Both parts feature moisture-resistant composition and active product status. RC1206FR-07510RL offers ±1% tolerance; RC1206JR-07510RL offers ±5% tolerance.

Q: Why do some substitutes have AEC-Q200 qualification?

A: AEC-Q200 is an automotive industry qualification standard. Parts with this certification meet automotive reliability and quality requirements. AEC-Q200 qualification is not required for non-automotive applications but indicates higher manufacturing standards and reliability testing.

Q: Can I substitute MCR18ERTJ511 with ERJ-8GEYJ511V or ERJ-8ENF5100V?

A: These Panasonic parts are electrically compatible but marked Not For New Designs. They are acceptable for legacy system repairs or maintenance but should not be selected for new circuit designs. Prefer active-status alternatives such as RMCF1206JT510R or KTR18EZPF5100.

Q: What does temperature coefficient ±200ppm/°C versus ±100ppm/°C mean for substitution?

A: Temperature coefficient indicates how much the resistance value changes with temperature. ±100ppm/°C (tighter) is a direct upgrade from ±200ppm/°C (original). For most applications, both are compatible. Applications requiring high precision across wide temperature ranges benefit from ±100ppm/°C parts.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain MSL rating of 1 (Unlimited), matching the original MCR18ERTJ511 environmental compliance requirements.

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