Equivalent & Substitute Parts for MCR18ERTJ821

Part Overview

The MCR18ERTJ821 is an 820 Ohms ±5% 0.25W (1/4W) thick film chip resistor in 1206 (3216 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility while meeting current design requirements. The part operates across -55°C to 155°C with ±200ppm/°C temperature coefficient and is ROHS3 compliant with MSL 1 rating.

Key Parameters

Parameter	Value
Resistance	820 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
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Resistance value must be 820 Ohms. Tolerance must be ±5% or tighter (±1% acceptable). Power rating must be equal to or greater than 0.25W. Package must be 1206 (3216 Metric). Operating temperature range must encompass -55°C to 155°C. Composition must be thick film. All parts must be ROHS3 compliant with MSL 1 rating.

Parts are categorized as direct substitutes when all parameters match the original specification. Upgrade substitutes offer enhanced performance characteristics such as higher power ratings, tighter tolerances, or automotive qualification (AEC-Q200) while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Product Status	AEC-Q200
MCR18ERTJ821	Rohm Semiconductor	820 Ω	±5%	0.25	±200	-55 ~ 155	1206	Discontinued	No
ESR18EZPJ821	Rohm Semiconductor	820 Ω	±5%	0.5	±200	-55 ~ 155	1206	Active	Yes
KTR18EZPF8200	Rohm Semiconductor	820 Ω	±1%	0.25	±100	-55 ~ 155	1206	Active	Yes
ERJ-8GEYJ821V	Panasonic Electronic Components	820 Ω	±5%	0.25	±200	-55 ~ 155	1206	Not For New Designs	Yes
RMCF1206JT820R	Stackpole Electronics Inc	820 Ω	±5%	0.25	±200	-55 ~ 155	1206	Active	Yes
CRCW1206820RJNEAHP	Vishay Dale	820 Ω	±5%	0.75	±200	-55 ~ 155	1206	Active	Yes
CRG1206F820R	TE Connectivity Passive Product	820 Ω	±1%	0.25	±100	-55 ~ 155	1206	Active	No
ERJ-8ENF8200V	Panasonic Electronic Components	820 Ω	±1%	0.25	±100	-55 ~ 155	1206	Not For New Designs	Yes
ERJ-P08J821V	Panasonic Electronic Components	820 Ω	±5%	0.667	±200	-55 ~ 155	1206	Active	Yes
RC1206FR-07820RL	YAGEO	820 Ω	±1%	0.25	±100	-55 ~ 155	1206	Active	No
RC1206JR-07820RL	YAGEO	820 Ω	±5%	0.25	±100	-55 ~ 155	1206	Active	No

Engineering Selection Recommendations

For applications requiring automotive qualification, select from active parts with AEC-Q200 certification: RMCF1206JT820R (Stackpole), ESR18EZPJ821 (Rohm), or ERJ-P08J821V (Panasonic). These parts maintain the original ±5% tolerance and ±200ppm/°C temperature coefficient while offering active product status and automotive compliance.

For applications requiring tighter tolerance (±1%), select CRG1206F820R (TE Connectivity) or RC1206FR-07820RL (YAGEO) for non-automotive use, or KTR18EZPF8200 (Rohm) for automotive-qualified designs. These parts feature ±100ppm/°C temperature coefficient and active product status.

For applications with higher power dissipation requirements, CRCW1206820RJNEAHP (Vishay Dale) provides 0.75W rating with AEC-Q200 qualification and pulse withstanding capability. ERJ-P08J821V (Panasonic) offers 0.667W rating with AEC-Q200 qualification.

Avoid parts marked "Not For New Designs" (ERJ-8GEYJ821V, ERJ-8ENF8200V) for new product development. These are suitable only for legacy system maintenance or repair applications.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute with higher power rating than the original MCR18ERTJ821?

A: Yes. A higher power rating (0.5W, 0.667W, or 0.75W) is electrically compatible and provides additional thermal margin. The 1206 package dimensions remain identical, ensuring mechanical fit. Select based on your circuit's actual power dissipation requirements.

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

A: Tolerance specifies the maximum deviation from the nominal 820 Ohm value. ±5% allows 779–861 Ohms; ±1% allows 812–828 Ohms. Use ±1% tolerance parts in precision circuits requiring tighter resistance values. Both are electrically compatible in the 1206 package.

Q: Are AEC-Q200 certified parts required for my application?

A: AEC-Q200 certification is mandatory for automotive applications. For industrial or consumer applications, non-certified parts are acceptable. All listed substitutes meet ROHS3 and MSL 1 requirements regardless of AEC-Q200 status.

Q: Will package dimensions vary between substitute parts?

A: All listed substitutes use the 1206 (3216 Metric) package. Dimensional variations are minimal (length 3.05–3.20mm, width 1.55–1.60mm, height 0.65–0.70mm seated). These variations are within standard PCB footprint tolerances and do not affect mechanical compatibility.

Q: Can I substitute MCR18ERTJ821 with a part marked "Not For New Designs"?

A: Parts marked "Not For New Designs" (ERJ-8GEYJ821V, ERJ-8ENF8200V) are electrically compatible but should not be used in new product development. Use only for legacy system maintenance or repair where the original part is unavailable and the system is already in production.

Q: What is the temperature coefficient difference between ±200ppm/°C and ±100ppm/°C?

A: Temperature coefficient indicates resistance change per degree Celsius. ±200ppm/°C means the resistance changes by up to 0.02% per °C; ±100ppm/°C means 0.01% per °C. Use ±100ppm/°C parts in temperature-sensitive circuits requiring higher stability across the -55°C to 155°C operating range.

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