MCR10ERTJ821 Equivalent & Substitute Parts

Part Overview

The MCR10ERTJ821 is a 820 Ohms ±5% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain identical electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (package size, termination count) to ensure direct board-level replacement without design modification.

Key Parameters

Parameter	MCR10ERTJ821
Resistance	820 Ohms
Tolerance	±5%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±200ppm/°C
Operating Temperature Range	-55°C ~ 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter alignment with the MCR10ERTJ821:

Direct Substitutes (Identical Electrical Specifications): Parts matching all critical parameters—820 Ohms resistance, ±5% tolerance, 0.125W power rating, ±200ppm/°C temperature coefficient, and 0805 package. These parts provide pin-for-pin and functional equivalence without circuit performance impact.

Upgrade Substitutes (Enhanced Specifications): Parts with improved tolerance (±1% vs ±5%), higher power ratings (0.4W or 0.5W vs 0.125W), or lower temperature coefficients (±100ppm/°C vs ±200ppm/°C). These parts exceed the original specification and are suitable for applications requiring tighter tolerances or higher power dissipation margins.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Product Status	AEC-Q200
MCR10ERTJ821	Rohm Semiconductor	820 Ω	±5%	0.125	±200	0805	Discontinued	No
CR0805-JW-821ELF	Bourns Inc.	820 Ω	±5%	0.125	±200	0805	Active	No
CRCW0805820RJNEA	Vishay Dale	820 Ω	±5%	0.125	±200	0805	Active	Yes
ERJ-6GEYJ821V	Panasonic Electronic Components	820 Ω	±5%	0.125	±200	0805	Active	Yes
RMCF0805JT820R	Stackpole Electronics Inc	820 Ω	±5%	0.125	±200	0805	Active	Yes
CRG0805F820R	TE Connectivity Passive Product	820 Ω	±1%	0.125	±100	0805	Active	No
KTR10EZPF8200	Rohm Semiconductor	820 Ω	±1%	0.125	±100	0805	Active	Yes
ERJ-6ENF8200V	Panasonic Electronic Components	820 Ω	±1%	0.125	±100	0805	Active	Yes
ESR10EZPJ821	Rohm Semiconductor	820 Ω	±5%	0.4	±200	0805	Active	Yes
ERJ-P06J821V	Panasonic Electronic Components	820 Ω	±5%	0.5	±200	0805	Active	Yes
ERJ-P6WF8200V	Panasonic Electronic Components	820 Ω	±1%	0.5	±200	0805	Not For New Designs	Yes

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select from CRCW0805820RJNEA (Vishay Dale), ERJ-6GEYJ821V (Panasonic), or RMCF0805JT820R (Stackpole). All three are active products with AEC-Q200 automotive qualification, ensuring long-term availability and compliance with automotive reliability standards. CR0805-JW-821ELF (Bourns) provides an alternative without AEC-Q200 certification but maintains identical electrical and mechanical parameters.

For Tolerance Upgrade (±1% vs ±5%): CRG0805F820R (TE Connectivity) or KTR10EZPF8200 (Rohm) offer improved tolerance with ±100ppm/°C temperature coefficient. KTR10EZPF8200 includes AEC-Q200 certification. ERJ-6ENF8200V (Panasonic) provides the same tolerance upgrade with AEC-Q200 qualification.

For Power Rating Upgrade: ESR10EZPJ821 (Rohm, 0.4W) or ERJ-P06J821V (Panasonic, 0.5W) accommodate applications requiring higher power dissipation while maintaining 0805 package footprint. Both include AEC-Q200 certification and pulse withstanding capability.

For New Design Consideration: Avoid ERJ-P6WF8200V (Panasonic), marked "Not For New Designs," despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with ±1% tolerance in place of the ±5% MCR10ERTJ821? A: Yes. Parts with ±1% tolerance (CRG0805F820R, KTR10EZPF8200, ERJ-6ENF8200V) are electrically compatible and provide superior accuracy. No circuit redesign is required.

Q: Are higher power-rated substitutes (0.4W, 0.5W) compatible with the original 0.125W design? A: Yes. Higher power ratings provide additional thermal margin and are mechanically compatible in the 0805 package. They do not alter circuit function and are suitable for direct substitution.

Q: What is the significance of AEC-Q200 certification? A: AEC-Q200 certification indicates the part meets automotive reliability and qualification standards. Parts with this certification (CRCW0805820RJNEA, ERJ-6GEYJ821V, RMCF0805JT820R, KTR10EZPF8200, ERJ-6ENF8200V, ESR10EZPJ821, ERJ-P06J821V) are suitable for automotive and high-reliability applications.

Q: Will substituting with a different manufacturer affect PCB assembly? A: No. All substitute parts share identical 0805 (2012 Metric) package dimensions, footprint, and two-termination configuration. PCB layout and assembly processes remain unchanged.

Q: Which substitute offers the best long-term availability? A: RMCF0805JT820R (Stackpole) shows the highest inventory (361,971 pcs), followed by ERJ-6GEYJ821V (Panasonic, 93,909 pcs) and CRCW0805820RJNEA (Vishay, 20,300 pcs). All three are active products with established supply chains.

Q: Can I use ERJ-P6WF8200V as a substitute? A: While ERJ-P6WF8200V meets electrical specifications, it is marked "Not For New Designs." Use only for legacy system maintenance or repair where no alternative is available.

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