RCS2012F2490CS Equivalent & Substitute Parts Reference

Part Overview

The RCS2012F2490CS is a 249 Ohm ±1% 0.125W (1/8W) thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component is currently Active in product status and is supplied in Tape & Reel packaging. The part features anti-sulfur and moisture-resistant construction with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, supply chain considerations, or specific feature requirements while maintaining electrical and mechanical compatibility within the 0805 package class.

Key Parameters

Parameter	Value
Resistance	249 Ohms
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)
Number of Terminations	2

Substitute Part Grouping Explanation

Substitute parts for the RCS2012F2490CS are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters (Must Match Exactly):

Resistance value: 249 Ohms
Tolerance: ±1%
Package / Case: 0805 (2012 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
Number of Terminations: 2
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameter:

Power Rating: Substitutes may have equal or higher power ratings (0.125W or 0.5W) while maintaining the same 0805 package footprint

Manufacturer Variation: Substitute parts are sourced from different manufacturers (YAGEO, Vishay Dale, Panasonic Electronic Components, Stackpole Electronics Inc) while maintaining identical electrical specifications and package dimensions.

Parameter Comparison

Parameter	RCS2012F2490CS (Samsung)	AC0805FR-07249RL (YAGEO)	CRCW0805249RFKEA (Vishay Dale)	CRCW0805249RFKEAHP (Vishay Dale)	ERJ-6ENF2490V (Panasonic)	RCS0805249RFKEA (Vishay Dale)	RMCF0805FT249R (Stackpole)
Resistance	249 Ohms	249 Ohms	249 Ohms	249 Ohms	249 Ohms	249 Ohms	249 Ohms
Tolerance	±1%	±1%	±1%	±1%	±1%	±1%	±1%
Power Rating	0.125W (1/8W)	0.125W (1/8W)	0.125W (1/8W)	0.5W (1/2W)	0.125W (1/8W)	0.5W (1/2W)	0.125W (1/8W)
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)
Composition	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film	Thick Film
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C	±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	-55°C ~ 155°C	-55°C ~ 155°C	-55°C ~ 155°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
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)	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)	0.024" (0.60mm)	0.020" (0.50mm)	0.020" (0.50mm)	0.028" (0.70mm)	0.020" (0.50mm)	0.026" (0.65mm)
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. Selection among equivalent parts should be based on the following criteria:

Direct Equivalents (0.125W Power Rating): AC0805FR-07249RL, ERJ-6ENF2490V, and RMCF0805FT249R are direct electrical and mechanical equivalents to the RCS2012F2490CS. These parts share identical power ratings, resistance values, tolerances, and operating temperature ranges. All three are qualified to AEC-Q200 automotive standards. Selection among these three may be determined by inventory availability, lead time, or specific manufacturing process requirements.

Higher Power Rating Alternatives (0.5W Power Rating): CRCW0805249RFKEAHP and RCS0805249RFKEA provide 0.5W (1/2W) power ratings while maintaining the same 0805 package footprint. These parts are suitable for applications requiring higher power dissipation capability without changing board layout or footprint. Both feature pulse withstanding characteristics and AEC-Q200 qualification.

Standard Equivalent (0.125W Power Rating): CRCW0805249RFKEA provides a 0.125W equivalent with identical electrical specifications to the main part and the lowest seated height (0.020" / 0.50mm), which may be advantageous for space-constrained applications.

All substitute parts are supplied in Tape & Reel packaging and maintain unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CRCW0805249RFKEAHP (0.5W) be used as a direct replacement for RCS2012F2490CS (0.125W)?

A: Yes. The CRCW0805249RFKEAHP is electrically and mechanically compatible. The higher power rating (0.5W versus 0.125W) does not create incompatibility; it provides additional thermal margin. The 0805 package footprint, resistance value, tolerance, temperature coefficient, and operating temperature range are identical. The seated height difference (0.020" versus 0.026") is within typical PCB assembly tolerances.

Q: Are all substitute parts qualified to automotive standards?

A: AC0805FR-07249RL, CRCW0805249RFKEA, CRCW0805249RFKEAHP, ERJ-6ENF2490V, RCS0805249RFKEA, and RMCF0805FT249R all carry AEC-Q200 qualification. The main part RCS2012F2490CS does not list AEC-Q200 qualification but features anti-sulfur and moisture-resistant construction.

Q: What is the significance of seated height variations among substitute parts?

A: Seated height variations (0.020" to 0.028") reflect different manufacturing processes but do not affect electrical performance or PCB assembly compatibility. All parts conform to the 0805 (2012 Metric) package specification. Height differences are within standard pick-and-place machine tolerances and do not require design changes.

Q: Can substitute parts be mixed within a single assembly?

A: Yes. All substitute parts meet identical electrical specifications (249 Ohms ±1%, ±100ppm/°C, -55°C ~ 155°C operating range) and package requirements (0805, 2 terminations, ROHS3 compliant, MSL 1). Mixing different manufacturers' parts within a single PCB assembly does not create electrical or reliability issues.

Q: What is the difference between RCS0805249RFKEA and RCS2012F2490CS?

A: Both are 249 Ohm ±1% resistors in 0805 package. The primary difference is power rating: RCS2012F2490CS is rated 0.125W (1/8W), while RCS0805249RFKEA is rated 0.5W (1/2W). RCS0805249RFKEA also features pulse withstanding capability and AEC-Q200 qualification. Both maintain identical resistance, tolerance, temperature coefficient, and operating temperature range.

Q: Are all parts available in Tape & Reel packaging?

A: Yes. All listed parts, including the main part RCS2012F2490CS and all six substitute parts, are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 3, restricting the use of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. All listed parts meet this regulatory requirement.

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