MCR03ERTF1821 Equivalent & Substitute Parts

Part Overview

The MCR03ERTF1821 is a 1.82 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct board-level replacement without design modification.

Key Parameters

Parameter	Specification
Resistance Value	1.82 kOhms
Tolerance	±1%
Power Rating	0.1W (1/10W)
Package / Case	0603 (1608 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C to 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Resistance value: 1.82 kOhms
Tolerance: ±1%
Power rating: 0.1W
Package: 0603 (1608 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C
Termination count: 2
Moisture sensitivity level: 1

All listed substitute parts meet these core electrical and mechanical requirements. Variations in product status, packaging format (Cut Tape vs. Tape & Reel), and optional certifications (AEC-Q200, Moisture Resistant features) do not affect functional substitutability but may influence selection based on application requirements and supply chain considerations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power	Package	Temp Coeff	Op. Temp Range	Product Status	RoHS	Packaging Type
MCR03ERTF1821	Rohm Semiconductor	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Discontinued	ROHS3	Cut Tape (CT)
RC1608F1821CS	Samsung Electro-Mechanics	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Cut Tape (CT)
AC0603FR-071K82L	YAGEO	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Tape & Reel (TR)
CR0603-FX-1821ELF	Bourns Inc.	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Tape & Reel (TR)
CRCW06031K82FKEA	Vishay Dale	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Tape & Reel (TR)
CRCW06031K82FKEB	Vishay Dale	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Discontinued	ROHS3	Tape & Reel (TR)
CRCW06031K82FKTA	Vishay Dale	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	RoHS Non-compliant	Tape & Reel (TR)
ERJ-3EKF1821V	Panasonic Electronic Components	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Tape & Reel (TR)
RC0603FR-071K82L	YAGEO	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Cut Tape (CT)
RMCF0603FT1K82	Stackpole Electronics Inc	1.82 kΩ	±1%	0.1W	0603	±100ppm/°C	-55°C ~ 155°C	Active	ROHS3	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitutes (Active Status, ROHS3 Compliant):

RC1608F1821CS (Samsung Electro-Mechanics) and RC0603FR-071K82L (YAGEO) are direct functional equivalents with active product status and full ROHS3 compliance. Both maintain identical electrical and mechanical specifications with the original MCR03ERTF1821.

Secondary Substitutes (Active Status, AEC-Q200 Certified):

AC0603FR-071K82L (YAGEO), CRCW06031K82FKEA (Vishay Dale), ERJ-3EKF1821V (Panasonic), and RMCF0603FT1K82 (Stackpole) are suitable for applications requiring automotive-grade qualification. These parts carry AEC-Q200 certification and maintain full electrical equivalence.

Alternative Substitutes (Active Status, Standard Grade):

CR0603-FX-1821ELF (Bourns Inc.) is functionally equivalent with active product status and ROHS3 compliance, suitable for general industrial applications.

Not Recommended:

CRCW06031K82FKTA (Vishay Dale) is active but RoHS non-compliant and REACH-affected, unsuitable for applications requiring regulatory compliance. CRCW06031K82FKEB (Vishay Dale) is discontinued at DiGi Electronics.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for MCR03ERTF1821?

A: All listed substitute parts meet the core electrical and mechanical requirements (1.82 kΩ ±1%, 0.1W, 0603 package, ±100ppm/°C, -55°C to 155°C). Direct board-level substitution is possible without design modification. Selection should prioritize active product status and compliance requirements.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual strips suitable for manual assembly or small-volume production. Tape & Reel packaging is supplied on continuous reels for automated pick-and-place assembly. Both formats contain identical components; packaging choice depends on assembly process requirements.

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

A: AEC-Q200 is an automotive industry qualification standard. Parts with this certification are qualified for automotive applications and typically undergo additional reliability testing. Use AEC-Q200 certified parts for automotive or high-reliability applications; standard-grade parts are suitable for general industrial use.

Q: Does RoHS compliance affect electrical performance?

A: RoHS compliance indicates the absence of restricted substances (lead, cadmium, mercury, etc.) but does not affect electrical performance. ROHS3 compliant parts are required for most commercial and industrial applications. CRCW06031K82FKTA is RoHS non-compliant and should be avoided for new designs.

Q: Are there inventory considerations for substitute selection?

A: Inventory levels vary significantly among manufacturers. RC0603FR-071K82L (YAGEO) has the highest inventory (203,880 pcs), followed by RMCF0603FT1K82 (Stackpole, 128,737 pcs) and ERJ-3EKF1821V (Panasonic, 70,574 pcs). High inventory availability supports supply chain continuity for production programs.

Q: Can I mix different substitute parts in the same assembly?

A: Yes. All substitute parts are electrically and mechanically equivalent. Mixing different manufacturers in the same assembly is acceptable from a functional standpoint, though single-source standardization is recommended for manufacturing consistency and traceability.

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