RCS2012F4221CS Equivalent & Substitute Parts

Part Overview

The RCS2012F4221CS is a 4.22 kOhms ±1% 0.125W thick film chip resistor manufactured by Samsung Electro-Mechanics in the 0805 (2012 Metric) package format. This component is classified as Active product status and is supplied in Tape & Reel packaging. The resistor features anti-sulfur and moisture-resistant construction, suitable for general industrial and commercial applications requiring stable resistance values across extended temperature ranges.

Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value
Resistance	4.22 kOhms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package / Case	0805 (2012 Metric)
Composition	Thick Film
Temperature Coefficient	±100ppm/°C
Operating Temperature Range	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RCS2012F4221CS is determined by strict alignment of the following parameters:

Critical Matching Parameters:

Resistance value: 4.22 kOhms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package format: 0805 (2012 Metric)
Composition: Thick Film
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

All identified substitute parts meet these electrical and mechanical specifications. Variations in physical height and specific feature sets (such as automotive qualification or anti-sulfur treatment) do not affect functional interchangeability when these core parameters are matched.

Parameter Comparison

Parameter	RCS2012F4221CS (Samsung)	CRCW08054K22FKEA (Vishay Dale)	ERJ-6ENF4221V (Panasonic)	RC0805FR-074K22L (YAGEO)
Resistance	4.22 kOhms	4.22 kOhms	4.22 kOhms	4.22 kOhms
Tolerance	±1%	±1%	±1%	±1%
Power (Watts)	0.125W	0.125W	0.125W	0.125W
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±100ppm/°C
Operating Temperature	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)	0.079" L x 0.049" W (2.00mm x 1.25mm)
Height - Seated (Max)	0.026" (0.66mm)	0.020" (0.50mm)	0.028" (0.70mm)	0.024" (0.60mm)
Number of Terminations	2	2	2	2
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All substitute parts listed—CRCW08054K22FKEA, ERJ-6ENF4221V, and RC0805FR-074K22L—are functionally equivalent to the RCS2012F4221CS based on matching electrical specifications and mechanical dimensions. Each substitute maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

The CRCW08054K22FKEA and ERJ-6ENF4221V carry AEC-Q200 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components. The RC0805FR-074K22L from YAGEO offers the highest inventory availability among substitutes.

Physical height variations across the substitute options (ranging from 0.020" to 0.028" seated height) remain within acceptable tolerances for standard PCB assembly processes and do not impact electrical performance or circuit functionality.

Frequently Asked Questions (FAQ)

Q: Can CRCW08054K22FKEA replace RCS2012F4221CS in any application?

A: Yes. Both components share identical electrical specifications (4.22 kOhms ±1%, 0.125W), operate across the same temperature range (-55°C ~ 155°C), and use the 0805 package format. Physical height differences (0.020" vs. 0.026") do not affect circuit performance.

Q: What is the difference between the Samsung RCS2012F4221CS and Panasonic ERJ-6ENF4221V?

A: The primary differences are manufacturer identity and feature set. The Samsung part includes anti-sulfur treatment, while the Panasonic part carries AEC-Q200 automotive qualification. Both meet identical electrical and mechanical requirements for direct substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The RCS2012F4221CS and all three substitute parts (CRCW08054K22FKEA, ERJ-6ENF4221V, RC0805FR-074K22L) are ROHS3 compliant and REACH unaffected.

Q: Does the height difference between substitute parts matter for PCB assembly?

A: No. All substitute parts maintain heights between 0.020" and 0.028" (0.50mm to 0.70mm), which falls within standard PCB assembly tolerances for 0805 components. Height variations do not affect electrical performance or mechanical fit.

Q: Which substitute part has the best inventory availability?

A: RC0805FR-074K22L from YAGEO has the highest inventory level at 169,734 pieces. CRCW08054K22FKEA (Vishay Dale) has 20,210 pieces, and ERJ-6ENF4221V (Panasonic) has 70,282 pieces available.

Q: Can I use ERJ-6ENF4221V in non-automotive applications?

A: Yes. AEC-Q200 qualification is a superset of standard reliability requirements. Components qualified to automotive standards function in general industrial and commercial applications.

Q: Are all substitute parts supplied in Tape & Reel packaging?

A: Yes. The RCS2012F4221CS and all substitute parts are supplied in Tape & Reel (TR) packaging format.

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