RCS2012F1181CS Equivalent & Substitute Parts Reference

Part Overview

The RCS2012F1181CS is a 1.18 kOhms ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Samsung Electro-Mechanics. This component is classified as Active product status with anti-sulfur and moisture resistant characteristics. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Specification
Resistance Value	1.18 kOhms
Tolerance	±1%
Power Rating	0.125W (1/8W)
Package Type	0805 (2012 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

Substitute parts for the RCS2012F1181CS are qualified based on the following criteria:

Electrical Parameters (Critical):

Resistance value: 1.18 kOhms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C to 155°C

Mechanical Parameters (Critical):

Package: 0805 (2012 Metric)
Dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
Number of terminations: 2

Compliance Parameters:

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Unaffected status

All identified substitute parts meet these criteria and are classified as Active products with equivalent thick film composition.

Parameter Comparison

Parameter	RCS2012F1181CS (Samsung)	CRCW08051K18FKEA (Vishay Dale)	ERJ-6ENF1181V (Panasonic)	RC0805FR-071K18L (YAGEO)
Resistance	1.18 kOhms	1.18 kOhms	1.18 kOhms	1.18 kOhms
Tolerance	±1%	±1%	±1%	±1%
Power Rating	0.125W	0.125W	0.125W	0.125W
Package	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 to 155°C	-55°C to 155°C	-55°C to 155°C	-55°C to 155°C
Dimensions (L x W)	0.079" x 0.049" (2.00mm x 1.25mm)	0.079" x 0.049" (2.00mm x 1.25mm)	0.079" x 0.049" (2.00mm x 1.25mm)	0.079" x 0.049" (2.00mm x 1.25mm)
Height - Seated (Max)	0.026" (0.66mm)	0.020" (0.50mm)	0.028" (0.70mm)	0.024" (0.60mm)
Terminations	2	2	2	2
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four components listed—RCS2012F1181CS, CRCW08051K18FKEA, ERJ-6ENF1181V, and RC0805FR-071K18L—are functionally equivalent for direct substitution based on electrical and mechanical parameters. Selection among these parts may be determined by:

Compliance Certifications:

CRCW08051K18FKEA and ERJ-6ENF1181V carry AEC-Q200 automotive qualification, suitable for automotive and high-reliability applications.
RCS2012F1181CS and RC0805FR-071K18L are standard industrial-grade components without automotive certification.

Environmental Features:

RCS2012F1181CS includes anti-sulfur characteristics in addition to moisture resistance.
RC0805FR-071K18L provides moisture resistant thick film construction.
CRCW08051K18FKEA and ERJ-6ENF1181V provide automotive-grade thick film construction.

Physical Height Variation:

CRCW08051K18FKEA: 0.020" (0.50mm) maximum seated height
RC0805FR-071K18L: 0.024" (0.60mm) maximum seated height
RCS2012F1181CS: 0.026" (0.66mm) maximum seated height
ERJ-6ENF1181V: 0.028" (0.70mm) maximum seated height

All components maintain ROHS3 compliance, MSL Level 1 rating, and Active product status. Component selection should align with application requirements regarding automotive qualification and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can CRCW08051K18FKEA replace RCS2012F1181CS in all applications?

A: CRCW08051K18FKEA meets all electrical and mechanical specifications for direct substitution. The primary difference is AEC-Q200 automotive qualification present in CRCW08051K18FKEA but not in RCS2012F1181CS. In non-automotive applications, both components are functionally equivalent. In automotive applications, CRCW08051K18FKEA provides additional qualification assurance.

Q: What is the significance of the height difference between substitute parts?

A: The seated height varies between 0.020" (0.50mm) and 0.028" (0.70mm) across the four parts. This variation is within typical 0805 package tolerances. Height differences become relevant only in space-constrained designs with minimal clearance above the component. For standard PCB layouts, all four parts are mechanically compatible.

Q: Are all substitute parts available in the same packaging format?

A: All four parts are supplied in Tape & Reel (TR) packaging, the standard format for automated assembly. Packaging format is identical across RCS2012F1181CS, CRCW08051K18FKEA, ERJ-6ENF1181V, and RC0805FR-071K18L.

Q: What does MSL Level 1 (Unlimited) mean for these components?

A: Moisture Sensitivity Level 1 indicates the component has unlimited shelf life without special moisture control measures. All four substitute parts carry MSL Level 1 rating, eliminating moisture-related handling constraints during storage and assembly.

Q: Which substitute part should be selected for automotive applications?

A: Both CRCW08051K18FKEA and ERJ-6ENF1181V carry AEC-Q200 automotive qualification. Either part is suitable for automotive applications. RCS2012F1181CS and RC0805FR-071K18L lack automotive certification and should not be specified for automotive use without additional qualification.

Q: Are the temperature coefficients identical across all parts?

A: All four components specify ±100ppm/°C temperature coefficient and operate across the identical temperature range of -55°C to 155°C. Temperature performance is equivalent across all substitute options.

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