MCR03ERTJ821 Equivalent & Substitute Parts

Part Overview

The MCR03ERTJ821 is a 0603 (1608 Metric) thick film chip resistor rated at 820 Ohms ±5% with 0.1W power handling, manufactured by Rohm Semiconductor. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain the same electrical and mechanical specifications for direct board-level replacement or design flexibility.

Key Parameters

Parameter	Value
Resistance	820 Ohms
Tolerance	±5%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Operating Temperature Range	-55°C ~ 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for MCR03ERTJ821 is determined by strict equivalence in the following parameters:

Resistance Value: 820 Ohms (exact match required)
Tolerance: ±5% (direct equivalents) or ±1% (upgrades with improved tolerance)
Power Rating: 0.1W minimum
Package: 0603 (1608 Metric) form factor
Composition: Thick Film technology
Operating Temperature: -55°C ~ 155°C minimum range
Termination Count: 2-pin configuration
Environmental Compliance: ROHS3 Compliant, MSL 1

Substitute parts are categorized as:

Direct Equivalents (±5% tolerance, identical electrical performance): CR0603-JW-821ELF (Bourns Inc.), CRCW0603820RJNEA (Vishay Dale), RC0603JR-07820RL (YAGEO)

Upgrade Alternatives (±1% tolerance, improved accuracy, same package and power rating): KTR03EZPF8200 (Rohm Semiconductor), MCR03ERTF8200 (Rohm Semiconductor), CRG0603F820R (TE Connectivity), ERJ-3EKF8200V (Panasonic), RC0603FR-07820RL (YAGEO), RMCF0603FT820R (Stackpole Electronics)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Operating Temp (°C)	Package	Packaging Type	Product Status	RoHS	MSL
MCR03ERTJ821	Rohm Semiconductor	820 Ω	±5%	0.1	±200	-55 ~ 155	0603	Cut Tape & Digi-Reel	Discontinued	ROHS3	1
CR0603-JW-821ELF	Bourns Inc.	820 Ω	±5%	0.1	±200	-55 ~ 155	0603	Tape & Reel	Active	ROHS3	1
CRCW0603820RJNEA	Vishay Dale	820 Ω	±5%	0.1	±200	-55 ~ 155	0603	Cut Tape & Digi-Reel	Active	ROHS3	1
RC0603JR-07820RL	YAGEO	820 Ω	±5%	0.1	±100	-55 ~ 155	0603	Cut Tape & Digi-Reel	Active	ROHS3	1
KTR03EZPF8200	Rohm Semiconductor	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Tape & Reel	Active	ROHS3	1
MCR03ERTF8200	Rohm Semiconductor	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Cut Tape & Digi-Reel	Discontinued	ROHS3	1
CRG0603F820R	TE Connectivity Passive Product	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Tape & Reel	Active	ROHS3	1
ERJ-3EKF8200V	Panasonic Electronic Components	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Cut Tape & Digi-Reel	Active	ROHS3	1
RC0603FR-07820RL	YAGEO	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Cut Tape & Digi-Reel	Active	ROHS3	1
RMCF0603FT820R	Stackpole Electronics Inc	820 Ω	±1%	0.1	±100	-55 ~ 155	0603	Tape & Reel	Active	ROHS3	1

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

CR0603-JW-821ELF, CRCW0603820RJNEA, and RC0603JR-07820RL provide pin-for-pin equivalence with ±5% tolerance matching the original MCR03ERTJ821. All three are ROHS3 compliant with MSL 1 rating. CR0603-JW-821ELF (Bourns) and CRCW0603820RJNEA (Vishay Dale) are currently in active production status with high inventory availability, making them preferred choices for immediate procurement.

For Tolerance Upgrade (Improved Accuracy)

KTR03EZPF8200, CRG0603F820R, ERJ-3EKF8200V, RC0603FR-07820RL, and RMCF0603FT820R offer ±1% tolerance with identical package, power rating, and operating temperature range. These parts reduce tolerance stack-up in precision circuits while maintaining full compatibility. All are ROHS3 compliant with MSL 1. ERJ-3EKF8200V (Panasonic) and RMCF0603FT820R (Stackpole) show the highest inventory levels among upgrade options.

Packaging Consideration

Tape & Reel (TR) packaging is standard for high-volume production; Cut Tape (CT) & Digi-Reel packaging suits lower-volume or prototype applications. Selection between these does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a ±1% tolerance part as a direct substitute for the ±5% MCR03ERTJ821?

A: Yes. A ±1% tolerance part is a functional upgrade that maintains all electrical and mechanical specifications while providing tighter tolerance control. The part will operate identically in the circuit with improved accuracy.

Q: Are all listed substitutes mechanically compatible with the original MCR03ERTJ821?

A: Yes. All substitute parts use the 0603 (1608 Metric) package with identical footprint dimensions (0.063" L x 0.031" W, 1.60mm x 0.80mm), 2-pin termination, and maximum seated height of 0.022" (0.55mm). They are directly interchangeable on PCBs designed for 0603 resistors.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Both packaging types contain identical components. Cut Tape (CT) & Digi-Reel is supplied in smaller quantities on individual tape strips, suitable for prototyping and low-volume assembly. Tape & Reel (TR) is supplied in continuous reel format for automated pick-and-place equipment in production environments. Electrical and mechanical performance is identical.

Q: Why do some substitutes have ±100ppm/°C temperature coefficient while the original has ±200ppm/°C?

A: Temperature coefficient indicates resistance change over temperature range. The ±100ppm/°C specification in upgrade parts represents improved thermal stability compared to the original ±200ppm/°C. This is a performance enhancement with no compatibility impact.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the environmental compliance of the original MCR03ERTJ821.

Q: Which substitute has the highest inventory availability?

A: RC0603FR-07820RL (YAGEO) shows 349,096 pieces in stock, followed by RMCF0603FT820R (Stackpole Electronics) with 450,115 pieces. Both are active production parts with ±1% tolerance.

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