RCS2012F2491CS Equivalent & Substitute Parts Reference

Part Overview

The RCS2012F2491CS is a 2.49 kOhms ±1% 0.125W (1/8W) 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. The part is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating), mechanical compatibility (package size and form factor), and environmental operating parameters. Substitute parts enable procurement flexibility when the primary part experiences supply constraints or when design requirements permit alternative qualified manufacturers.

Key Parameters

Parameter	Value
Resistance	2.49 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
Terminations	2
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for RCS2012F2491CS are grouped based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Resistance value: 2.49 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Package: 0805 (2012 Metric) (exact match required)
Temperature coefficient: ±100ppm/°C (exact match required)
Operating temperature range: -55°C ~ 155°C (exact match required)
Composition: Thick Film (exact match required)
Number of terminations: 2 (exact match required)

Secondary Compatibility Factors:

Power rating: 0.125W (1/8W) for direct substitution; higher power ratings (0.5W/1/2W) are acceptable for applications with lower power dissipation requirements
RoHS compliance status
Moisture sensitivity level (MSL 1 for all listed parts)
Automotive qualification (AEC-Q200) where applicable

All substitute parts listed maintain identical electrical performance within the specified tolerance and operating conditions. Physical dimensions vary slightly in maximum seated height, which does not affect electrical function or PCB assembly compatibility for standard 0805 footprints.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Height Max (mm)	RoHS Status	AEC-Q200
RCS2012F2491CS	Samsung Electro-Mechanics	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.66	ROHS3	No
AC0805FR-072K49L	YAGEO	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.60	ROHS3	Yes
CRCW08052K49FKEA	Vishay Dale	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.50	ROHS3	Yes
CRCW08052K49FKEAHP	Vishay Dale	2.49 kΩ	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	0.50	ROHS3	Yes
CRCW08052K49FKTA	Vishay Dale	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.50	RoHS NC	Yes
ERJ-6ENF2491V	Panasonic Electronic Components	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.70	ROHS3	Yes
RC0805FR-072K49L	YAGEO	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.60	ROHS3	No
RCS08052K49FKEA	Vishay Dale	2.49 kΩ	±1%	0.5	0805	±100ppm/°C	-55 to 155°C	0.50	ROHS3	Yes
RMCF0805FT2K49	Stackpole Electronics Inc	2.49 kΩ	±1%	0.125	0805	±100ppm/°C	-55 to 155°C	0.65	ROHS3	Yes

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Power Specifications):

Parts AC0805FR-072K49L, CRCW08052K49FKEA, ERJ-6ENF2491V, RC0805FR-072K49L, and RMCF0805FT2K49 are electrically and mechanically equivalent to RCS2012F2491CS with 0.125W power rating. These parts maintain identical resistance, tolerance, temperature coefficient, and operating temperature range. Selection among these options is determined by availability, RoHS compliance requirements, and AEC-Q200 automotive qualification status.

Compliance Considerations:

RCS2012F2491CS is ROHS3 compliant. Substitute CRCW08052K49FKTA is RoHS non-compliant and REACH Affected; this part is suitable only for applications where RoHS compliance is not required. All other substitute parts maintain ROHS3 compliance status.

Automotive Applications:

For designs requiring AEC-Q200 automotive qualification, select from AC0805FR-072K49L, CRCW08052K49FKEA, CRCW08052K49FKEAHP, ERJ-6ENF2491V, RCS08052K49FKEA, or RMCF0805FT2K49. The primary part RCS2012F2491CS does not carry AEC-Q200 rating.

Higher Power Rating Options:

CRCW08052K49FKEAHP and RCS08052K49FKEA provide 0.5W (1/2W) power rating with pulse withstanding capability. These parts are suitable for applications where the original 0.125W specification permits higher power dissipation margin. Electrical characteristics remain identical; physical height is reduced to 0.50mm maximum.

Packaging Format:

All listed parts are available in Tape & Reel (TR) format except CRCW08052K49FKTA and ERJ-6ENF2491V, which are supplied in Cut Tape (CT) & Digi-Reel format. Packaging selection depends on assembly process requirements and volume specifications.

Frequently Asked Questions (FAQ)

Q: Can CRCW08052K49FKEAHP (0.5W) be used as a direct replacement for RCS2012F2491CS (0.125W)?

A: Yes. The higher power rating (0.5W vs 0.125W) provides additional thermal margin and does not affect electrical performance. The component will function identically in circuits designed for 0.125W dissipation. Physical dimensions remain compatible with 0805 footprints.

Q: What is the difference between AC0805FR-072K49L and RC0805FR-072K49L, both from YAGEO?

A: AC0805FR-072K49L includes AEC-Q200 automotive qualification and moisture-resistant features. RC0805FR-072K49L provides moisture-resistant characteristics without automotive qualification. Both maintain identical electrical specifications and ROHS3 compliance. Selection depends on automotive requirement applicability.

Q: Is CRCW08052K49FKTA suitable for new designs?

A: CRCW08052K49FKTA is RoHS non-compliant and REACH Affected. This part is restricted for new designs in most regulated markets. Use only when RoHS compliance is not required and REACH restrictions do not apply to the application.

Q: Do all substitute parts fit the same PCB footprint?

A: Yes. All listed parts use 0805 (2012 Metric) package with identical footprint dimensions (2.00mm L × 1.25mm W). Maximum seated height varies between 0.50mm and 0.70mm; this variation does not affect PCB assembly compatibility for standard 0805 land patterns.

Q: Which substitute offers the best availability?

A: RMCF0805FT2K49 (Stackpole Electronics) and ERJ-6ENF2491V (Panasonic) show highest inventory levels at 135,998 and 135,274 pieces respectively. CRCW08052K49FKEA (Vishay Dale) provides 31,572 pieces in stock.

Q: Can I use these parts interchangeably in production?

A: Parts with identical electrical specifications (2.49 kΩ ±1%, 0.125W, ±100ppm/°C, -55 to 155°C) are electrically interchangeable. Verify RoHS compliance, AEC-Q200 status, and packaging format match design and procurement requirements before implementing production substitution.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, eliminating moisture sensitivity concerns for storage and handling.

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