RC2012F4022CS 40.2kΩ ±1% 1/8W 0805 Chip Resistor Equivalent & Substitute Parts

Part Overview

The RC2012F4022CS is a thick film chip resistor manufactured by Samsung Electro-Mechanics, rated at 40.2 kOhms with ±1% tolerance and 0.125W (1/8W) power dissipation in 0805 (2012 Metric) package format. The component is RoHS3 compliant, moisture resistant, and rated for operating temperatures from -55°C to 155°C with a temperature coefficient of ±100ppm/°C. This part is currently in active production status with 1,080 pieces available in inventory. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and application-specific feature options such as automotive AEC-Q200 qualification or enhanced pulse withstanding capability.

Key Parameters

Parameter	Value
Resistance	40.2 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 to 155°C
Number of Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F4022CS is determined by strict equivalence across the following critical parameters: resistance value (40.2 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 to 155°C), and termination count (2). All substitute parts listed maintain these core electrical and mechanical specifications.

Substitute parts are categorized into two groups:

Direct Substitutes maintain identical specifications to the RC2012F4022CS, including moisture resistance features and standard packaging configurations. These parts are interchangeable without circuit design modification.

Similar Substitutes share all core electrical parameters but introduce additional features such as automotive AEC-Q200 qualification, enhanced pulse withstanding capability, or alternative packaging formats. These parts are suitable for applications requiring enhanced reliability or automotive-grade performance, provided the circuit design accommodates any dimensional variations.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Height Max (mm)	Features	RoHS Status	Inventory (Pcs)
RC2012F4022CS	Samsung Electro-Mechanics	40.2 kΩ	±1%	0.125	0805	0.65	Moisture Resistant	ROHS3	1,080
CR0805-FX-4022ELF	Bourns Inc.	40.2 kΩ	±1%	0.125	0805	0.60	Moisture Resistant	ROHS3	21,188
ERJ-6ENF4022V	Panasonic Electronic Components	40.2 kΩ	±1%	0.125	0805	0.70	Automotive AEC-Q200	ROHS3	117,876
KTR10EZPF4022	Rohm Semiconductor	40.2 kΩ	±1%	0.125	0805	0.65	Automotive AEC-Q200, High Voltage	ROHS3	19,001
RC0805FR-0740K2L	YAGEO	40.2 kΩ	±1%	0.125	0805	0.60	Moisture Resistant	ROHS3	304,186
RMCF0805FT40K2	Stackpole Electronics Inc	40.2 kΩ	±1%	0.125	0805	0.65	Automotive AEC-Q200	ROHS3	246,451
AC0805FR-0740K2L	YAGEO	40.2 kΩ	±1%	0.125	0805	0.60	Automotive AEC-Q200, Moisture Resistant	ROHS3	9,417
CRCW080540K2FKEA	Vishay Dale	40.2 kΩ	±1%	0.125	0805	0.50	Automotive AEC-Q200	ROHS3	1,896
CRCW080540K2FKEAHP	Vishay Dale	40.2 kΩ	±1%	0.5	0805	0.50	Automotive AEC-Q200, Pulse Withstanding	ROHS3	4,073
CRCW080540K2FKTA	Vishay Dale	40.2 kΩ	±1%	0.125	0805	0.50	Automotive AEC-Q200	RoHS Non-Compliant	28,634
RCS080540K2FKEA	Vishay Dale	40.2 kΩ	±1%	0.5	0805	0.50	Automotive AEC-Q200, Pulse Withstanding	ROHS3	6,388

Engineering Selection Recommendations

For Direct Substitution (Identical Specifications):

CR0805-FX-4022ELF (Bourns Inc.) and RC0805FR-0740K2L (YAGEO) are direct functional equivalents to the RC2012F4022CS. Both maintain 40.2 kΩ resistance, ±1% tolerance, 0.125W power rating, 0805 package format, and RoHS3 compliance. RC0805FR-0740K2L offers significantly higher inventory availability (304,186 pieces) compared to the original part. Both parts are suitable for applications where moisture resistance is required and no automotive qualification is mandated.

For Automotive Applications:

ERJ-6ENF4022V (Panasonic), KTR10EZPF4022 (Rohm Semiconductor), RMCF0805FT40K2 (Stackpole Electronics), AC0805FR-0740K2L (YAGEO), CRCW080540K2FKEA (Vishay Dale), and RCS080540K2FKEA (Vishay Dale) all carry AEC-Q200 automotive qualification. These parts are suitable for automotive-grade applications requiring enhanced reliability screening and qualification documentation. All maintain RoHS3 compliance except CRCW080540K2FKTA, which is RoHS non-compliant and should not be selected for new designs requiring RoHS compliance.

For Enhanced Power Dissipation:

CRCW080540K2FKEAHP (Vishay Dale) and RCS080540K2FKEA (Vishay Dale) provide 0.5W (1/2W) power rating with pulse withstanding capability, compared to the 0.125W rating of the RC2012F4022CS. These parts are suitable only for applications where higher power dissipation or pulse withstanding is required, as they represent a different power class and may not be necessary for standard 0.125W applications.

Compliance Considerations:

All recommended direct and similar substitutes maintain RoHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and REACH unaffected status, matching the environmental compliance profile of the RC2012F4022CS. CRCW080540K2FKTA should be excluded from new designs due to RoHS non-compliance.

Frequently Asked Questions (FAQ)

Q: Can CR0805-FX-4022ELF replace RC2012F4022CS in any application?

A: Yes. CR0805-FX-4022ELF is a direct functional equivalent with identical electrical specifications (40.2 kΩ, ±1%, 0.125W), package format (0805), and environmental compliance (RoHS3, MSL 1). The maximum seated height differs by 0.05mm (0.60mm vs. 0.65mm), which is negligible for standard PCB assembly. No circuit design modification is required.

Q: What is the difference between direct substitutes and similar substitutes?

A: Direct substitutes maintain all electrical and mechanical specifications of the RC2012F4022CS without additional features. Similar substitutes share core specifications but introduce features such as automotive AEC-Q200 qualification or enhanced pulse withstanding capability. Similar substitutes are suitable for applications requiring these additional features, provided the circuit design accommodates any dimensional or performance differences.

Q: Can I use CRCW080540K2FKEAHP (0.5W) in place of RC2012F4022CS (0.125W)?

A: CRCW080540K2FKEAHP is not a direct substitute due to different power rating (0.5W vs. 0.125W). This part is suitable only for applications requiring higher power dissipation or pulse withstanding capability. Using a higher-power-rated resistor in a 0.125W application is not problematic from an electrical standpoint but represents unnecessary cost and board space utilization.

Q: Are all substitute parts RoHS3 compliant?

A: No. CRCW080540K2FKTA is RoHS non-compliant and should not be selected for new designs or applications requiring RoHS compliance. All other listed substitutes are RoHS3 compliant and suitable for environmentally regulated applications.

Q: Which substitute offers the highest inventory availability?

A: RC0805FR-0740K2L (YAGEO) offers the highest inventory availability at 304,186 pieces. This part is a direct functional equivalent with identical specifications to the RC2012F4022CS and is suitable for immediate procurement without supply chain constraints.

Q: Can I use automotive-qualified parts (AEC-Q200) in non-automotive applications?

A: Yes. Automotive-qualified parts such as ERJ-6ENF4022V, KTR10EZPF4022, and RMCF0805FT40K2 can be used in non-automotive applications. These parts meet or exceed the specifications of the RC2012F4022CS and provide enhanced reliability screening. However, automotive qualification is not required for non-automotive applications and may represent unnecessary cost.

Q: What is the significance of the 0.05mm height difference between substitute parts?

A: The maximum seated height varies between 0.50mm and 0.70mm across substitute parts. For standard PCB assembly with typical component placement tolerances, these variations are negligible and do not affect circuit performance or assembly compatibility. Height differences become relevant only in space-constrained applications such as stacked component configurations or ultra-thin form factor designs.

Q: Is moisture resistance a critical parameter for all applications?

A: Moisture resistance is specified for RC2012F4022CS, CR0805-FX-4022ELF, RC0805FR-0740K2L, and AC0805FR-0740K2L. For applications exposed to high humidity, condensation, or moisture-prone environments, moisture-resistant variants are recommended. For standard indoor applications with controlled environmental conditions, moisture resistance is not a critical requirement, and non-moisture-resistant substitutes may be acceptable.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive industry standard qualification for passive components. Parts carrying this qualification have undergone enhanced reliability screening, temperature cycling, and performance validation specific to automotive applications. AEC-Q200 qualification does not change the electrical specifications but provides documented evidence of enhanced reliability and consistency suitable for automotive-grade applications.

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