MCR03ERTJ621 Equivalent & Substitute Parts

Part Overview

The MCR03ERTJ621 is a 620 Ohms ±5% thick film chip resistor in 0603 (1608 Metric) package rated for 0.1W power dissipation. Manufactured by Rohm Semiconductor, this component is discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or enhanced electrical specifications, ensuring design continuity and supply chain flexibility.

Key Parameters

Parameter	Value
Resistance	620 Ohms
Tolerance	±5%
Power Rating	0.1W (1/10W)
Package	0603 (1608 Metric)
Composition	Thick Film
Operating Temperature	-55°C to 155°C
Temperature Coefficient	±200ppm/°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on tolerance specification:

Direct Equivalents (±5% Tolerance): Parts maintaining identical tolerance to the MCR03ERTJ621. These provide one-to-one functional replacement without circuit performance impact.

Upgrade Options (±1% Tolerance): Parts with tighter tolerance specification. These offer improved accuracy and reduced tolerance stack-up in precision applications while maintaining all other electrical and mechanical compatibility.

Substitution eligibility is determined by:

Resistance value: 620 Ohms (exact match required)
Power rating: 0.1W minimum
Package: 0603 (1608 Metric) form factor
Operating temperature range: -55°C to 155°C minimum
RoHS3 compliance and MSL 1 rating

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power	Temp Coeff	Features	Status
MCR03ERTJ621	Rohm Semiconductor	620 Ω	±5%	0.1W	±200ppm/°C	—	Discontinued
CR0603-JW-621ELF	Bourns Inc.	620 Ω	±5%	0.1W	±200ppm/°C	Moisture Resistant	Active
CRCW0603620RJNEA	Vishay Dale	620 Ω	±5%	0.1W	±200ppm/°C	Automotive AEC-Q200	Active
RMCF0603JG620R	Stackpole Electronics Inc	620 Ω	±5%	0.1W	±200ppm/°C	Automotive AEC-Q200	Active
ERJ-3EKF6200V	Panasonic Electronic Components	620 Ω	±1%	0.1W	±100ppm/°C	Automotive AEC-Q200	Active
RC0603FR-07620RL	YAGEO	620 Ω	±1%	0.1W	±100ppm/°C	Moisture Resistant	Active
RC0603JR-07620RL	YAGEO	620 Ω	±5%	0.1W	±100ppm/°C	Moisture Resistant	Active
RMCF0603FT620R	Stackpole Electronics Inc	620 Ω	±1%	0.1W	±100ppm/°C	Automotive AEC-Q200	Active

Engineering Selection Recommendations

For Direct Replacement: CR0603-JW-621ELF, CRCW0603620RJNEA, or RMCF0603JG620R provide immediate functional equivalence with active product status and established supply availability. CRCW0603620RJNEA and RMCF0603JG620R carry AEC-Q200 automotive qualification, suitable for applications requiring automotive-grade reliability.

For Precision Applications: ERJ-3EKF6200V, RC0603FR-07620RL, or RMCF0603FT620R offer ±1% tolerance with reduced temperature coefficient (±100ppm/°C versus ±200ppm/°C), reducing tolerance stack-up in circuits sensitive to resistor accuracy. All three maintain AEC-Q200 or moisture-resistant features.

For High-Volume Supply: RC0603JR-07620RL (YAGEO) and RC0603FR-07620RL (YAGEO) provide the largest documented inventory levels, supporting extended production runs and supply chain continuity.

All substitute parts maintain 0603 package compatibility, RoHS3 compliance, and MSL 1 rating, ensuring PCB assembly process compatibility without modification.

Frequently Asked Questions (FAQ)

Q: Can I use a ±1% tolerance part as a direct replacement for the ±5% MCR03ERTJ621?

A: Yes. The ±1% tolerance parts (ERJ-3EKF6200V, RC0603FR-07620RL, RMCF0603FT620R) are electrically compatible and represent an upgrade in accuracy. They will function identically in circuits designed for ±5% tolerance, with improved performance margin.

Q: Are all substitute parts in the same 0603 package?

A: Yes. All listed substitute parts use the 0603 (1608 Metric) package with identical footprint dimensions (0.063" L x 0.031" W, 1.60mm x 0.80mm), ensuring PCB layout compatibility without redesign.

Q: What is the difference between direct equivalents and upgrade options?

A: Direct equivalents (CR0603-JW-621ELF, CRCW0603620RJNEA, RMCF0603JG620R) maintain ±5% tolerance matching the original part. Upgrade options (ERJ-3EKF6200V, RC0603FR-07620RL, RMCF0603FT620R) provide ±1% tolerance with lower temperature coefficient, improving circuit accuracy without changing electrical function.

Q: Do automotive-qualified parts (AEC-Q200) work in non-automotive applications?

A: Yes. AEC-Q200 qualification represents enhanced reliability testing and is fully compatible with non-automotive designs. These parts exceed standard requirements and present no compatibility issues.

Q: Which substitute offers the best supply availability?

A: RC0603JR-07620RL and RC0603FR-07620RL (YAGEO) show the highest documented inventory levels, supporting high-volume production requirements.

Q: Are moisture-resistant variants necessary for my application?

A: Moisture-resistant variants (CR0603-JW-621ELF, RC0603FR-07620RL, RC0603JR-07620RL) provide enhanced performance in humid environments. All parts carry MSL 1 rating, indicating unlimited shelf life under controlled storage. Selection depends on specific environmental exposure requirements.

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