RC2012F40R2CS Equivalent & Substitute Parts Reference

Part Overview

The RC2012F40R2CS is a 40.2 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format with 0.125W power rating. This component is classified as Active product status with moisture-resistant construction and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and environmental ratings to ensure direct circuit board compatibility and functional interchangeability.

Key Parameters

Parameter	Value
Resistance	40.2 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
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F40R2CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 40.2 Ohms
Tolerance: ±1%
Package / Case: 0805 (2012 Metric)
Power Rating: 0.125W (1/8W)
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)

Direct Substitutes maintain all mandatory parameters with identical electrical and mechanical specifications. These parts are listed as "Direct Manufacturer Part Number" and provide complete functional equivalence.

Similar Substitutes maintain all mandatory parameters but may include additional features (such as AEC-Q200 automotive qualification or higher power ratings) or differ in packaging format. These parts are listed as "Similar Manufacturer Part Number" and are suitable for applications where the additional features do not create conflicts with circuit design requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	Product Status	RoHS
RC2012F40R2CS	Samsung Electro-Mechanics	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
CR0805-FX-40R2ELF	Bourns Inc.	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
ERJ-6ENF40R2V	Panasonic Electronic Components	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Active	ROHS3
KTR10EZPF40R2	Rohm Semiconductor	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, High Voltage	Active	ROHS3
RC0805FR-0740R2L	YAGEO	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	Active	ROHS3
RMCF0805FT40R2	Stackpole Electronics Inc	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Active	ROHS3
CRCW080540R2FKEA	Vishay Dale	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	Active	ROHS3
ERJ-P06F40R2V	Panasonic Electronic Components	40.2 Ω	±1%	0.5	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	Active	ROHS3
MCR10ERTF40R2	Rohm Semiconductor	40.2 Ω	±1%	0.125	0805	±100ppm/°C	-55~155°C	None	Discontinued at DiGi Electronics	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

CR0805-FX-40R2ELF (Bourns Inc.) and RC0805FR-0740R2L (YAGEO) are direct functional equivalents to the RC2012F40R2CS. Both maintain identical electrical specifications, package dimensions, and moisture-resistant construction. These parts are suitable for direct replacement in existing designs without circuit modification.

Automotive-Qualified Substitutes (Enhanced Reliability):

ERJ-6ENF40R2V (Panasonic), KTR10EZPF40R2 (Rohm), RMCF0805FT40R2 (Stackpole), and CRCW080540R2FKEA (Vishay Dale) include AEC-Q200 automotive qualification in addition to matching all mandatory electrical and mechanical parameters. These parts are suitable for applications requiring automotive-grade component reliability and traceability.

Higher Power Rating Substitute (Extended Thermal Margin):

ERJ-P06F40R2V (Panasonic) provides 0.5W power rating compared to the 0.125W specification of the main part. This part maintains all other mandatory parameters and includes AEC-Q200 qualification and pulse withstanding capability. Selection of this part is appropriate only when circuit design permits the higher power rating without creating thermal or layout conflicts.

Discontinued Part (Limited Availability):

MCR10ERTF40R2 (Rohm) is discontinued at DiGi Electronics and should not be selected for new designs. Existing inventory may be available through alternative distribution channels, but long-term supply cannot be assured.

Frequently Asked Questions (FAQ)

Q: Can I substitute CR0805-FX-40R2ELF for RC2012F40R2CS in my circuit?

A: Yes. CR0805-FX-40R2ELF is a direct substitute with identical resistance, tolerance, power rating, package dimensions, temperature coefficient, and operating temperature range. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between the main part and the AEC-Q200 qualified substitutes?

A: The AEC-Q200 qualified parts (ERJ-6ENF40R2V, KTR10EZPF40R2, RMCF0805FT40R2, CRCW080540R2FKEA) maintain identical electrical and mechanical specifications but include automotive-grade qualification and enhanced reliability testing. These parts are suitable for automotive applications or designs requiring higher reliability assurance.

Q: Can I use ERJ-P06F40R2V as a substitute for RC2012F40R2CS?

A: ERJ-P06F40R2V maintains all mandatory electrical parameters but provides 0.5W power rating instead of 0.125W. This part is suitable only if your circuit design accommodates the higher power rating. The increased power rating does not create functional incompatibility but may affect thermal performance and board layout considerations.

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

A: Most substitute parts are available in Tape & Reel (TR) packaging. MCR10ERTF40R2 is available in Cut Tape (CT) & Digi-Reel® format. Verify packaging format with your supplier before ordering to ensure compatibility with your assembly process.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level. These components do not require special moisture control during storage, handling, or assembly. No baking or desiccant storage is required before soldering.

Q: Why should I avoid MCR10ERTF40R2?

A: MCR10ERTF40R2 is discontinued at DiGi Electronics, indicating limited future availability. For new designs, select from active product status parts to ensure long-term supply chain reliability.

Q: Do all these parts meet ROHS3 compliance?

A: Yes. All listed parts, including the main part RC2012F40R2CS and all substitutes, are ROHS3 compliant and REACH unaffected.

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