RC2012F4021CS Equivalent & Substitute Parts

Part Overview

The RC2012F4021CS is a 4.02 kOhms ±1% 0.125W thick film chip resistor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This component is classified as Active product status with moisture-resistant construction and RoHS3 compliance. The part is supplied in Tape & Reel packaging with 1148 pieces currently in stock inventory.

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design specifications permit the use of components with enhanced ratings or certifications such as automotive AEC-Q200 qualification.

Key Parameters

Parameter	Value
Resistance	4.02 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
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	RoHS3 Compliant
Number of Terminations	2

Substitute Part Grouping Explanation

Substitution eligibility for the RC2012F4021CS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Resistance value: 4.02 kOhms
Tolerance: ±1%
Package / Case: 0805 (2012 Metric)
Composition: Thick Film
Temperature Coefficient: ±100ppm/°C
Operating Temperature Range: -55°C ~ 155°C
Moisture Sensitivity Level: 1 (Unlimited)
Number of Terminations: 2

Flexible Parameters (Substitution Permitted):

Power Rating: Substitutes with equal or higher power ratings are acceptable
Manufacturer: Different manufacturers permitted
Packaging format: Tape & Reel or Cut Tape variants permitted
Certifications: Additional certifications (AEC-Q200) are acceptable enhancements
RoHS Status: RoHS3 compliant or equivalent compliance required

Substitute parts are grouped into three categories: Direct equivalents (identical specifications), Upgrade substitutes (enhanced certifications), and Similar substitutes (alternative manufacturers with compatible specifications).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Height Max	AEC-Q200	RoHS Status	Inventory
RC2012F4021CS	Samsung Electro-Mechanics	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.66mm	No	RoHS3	1148
RC0805FR-074K02L	YAGEO	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.60mm	No	RoHS3	96894
AC0805FR-074K02L	YAGEO	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.60mm	Yes	RoHS3	10732
CRCW08054K02FKEA	Vishay Dale	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.50mm	Yes	RoHS3	36993
CRCW08054K02FKEAHP	Vishay Dale	4.02 kΩ	±1%	0.5	0805	±100ppm/°C	-55~155°C	0.50mm	Yes	RoHS3	19414
CRCW08054K02FKTA	Vishay Dale	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.50mm	Yes	RoHS non-compliant	2058
ERJ-6ENF4021V	Panasonic Electronic Components	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.70mm	Yes	RoHS3	134286
ESR10EZPF4021	Rohm Semiconductor	4.02 kΩ	±1%	0.4	0805	±100ppm/°C	-55~155°C	0.65mm	Yes	RoHS3	27440
RCS08054K02FKEA	Vishay Dale	4.02 kΩ	±1%	0.5	0805	±100ppm/°C	-55~155°C	0.50mm	Yes	RoHS3	7375
RMCF0805FT4K02	Stackpole Electronics Inc	4.02 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	0.65mm	Yes	RoHS3	8415

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement):

RC0805FR-074K02L (YAGEO) provides direct electrical and mechanical equivalence to the RC2012F4021CS. This part maintains identical resistance, tolerance, power rating, and temperature specifications while offering significantly higher inventory availability (96,894 units). The reduced maximum seated height (0.60mm vs 0.66mm) is within acceptable PCB assembly tolerances.

Upgrade Substitute (Enhanced Certification):

AC0805FR-074K02L (YAGEO) and CRCW08054K02FKEA (Vishay Dale) are qualified to automotive AEC-Q200 standard, providing enhanced reliability for applications requiring automotive-grade components. These parts maintain all electrical specifications of the primary part while offering improved qualification status. AC0805FR-074K02L provides the highest inventory availability among AEC-Q200 qualified options at 10,732 units.

Higher Power Rating Substitutes (Design Margin Enhancement):

CRCW08054K02FKEAHP (Vishay Dale), ESR10EZPF4021 (Rohm Semiconductor), and RCS08054K02FKEA (Vishay Dale) provide power ratings of 0.4W to 0.5W, exceeding the 0.125W specification of the primary part. These components are suitable for applications where thermal margin or pulse withstanding capability is required. All three maintain AEC-Q200 qualification and RoHS3 compliance.

Alternative Manufacturer Options:

ERJ-6ENF4021V (Panasonic Electronic Components) and RMCF0805FT4K02 (Stackpole Electronics Inc) provide equivalent specifications with AEC-Q200 qualification. Panasonic's part offers the highest inventory availability among all substitutes at 134,286 units.

Non-Compliant Option (Restricted Use):

CRCW08054K02FKTA (Vishay Dale) is RoHS non-compliant and REACH-affected. This part is suitable only for applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can RC0805FR-074K02L be used as a direct replacement for RC2012F4021CS?

A: Yes. RC0805FR-074K02L is a direct electrical equivalent with identical resistance (4.02 kΩ), tolerance (±1%), power rating (0.125W), and temperature specifications. The maximum seated height difference (0.60mm vs 0.66mm) is within standard PCB assembly tolerances and does not affect functionality.

Q: What is the difference between the standard substitute and the AEC-Q200 qualified versions?

A: AEC-Q200 qualified parts (AC0805FR-074K02L, CRCW08054K02FKEA, ERJ-6ENF4021V, ESR10EZPF4021, RCS08054K02FKEA, RMCF0805FT4K02) meet automotive industry reliability standards. These parts are suitable for automotive applications and applications requiring enhanced qualification documentation. The RC2012F4021CS and RC0805FR-074K02L do not carry AEC-Q200 qualification.

Q: Can I use CRCW08054K02FKEAHP (0.5W) instead of the 0.125W rated RC2012F4021CS?

A: Yes. Higher power-rated components are acceptable substitutes when the 0.125W specification is not a limiting design constraint. The 0.5W rating provides additional thermal margin and pulse withstanding capability. All other electrical parameters remain identical.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging is supplied on continuous reels suitable for automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel packaging is supplied in shorter tape segments. Both formats contain identical components; the difference is in supply format and handling. CRCW08054K02FKTA is available in Cut Tape format.

Q: Is CRCW08054K02FKTA suitable for RoHS-compliant applications?

A: No. CRCW08054K02FKTA is RoHS non-compliant and REACH-affected. This part is restricted to applications where RoHS compliance is not required. All other substitute options listed are RoHS3 compliant.

Q: Which substitute offers the best inventory availability?

A: ERJ-6ENF4021V (Panasonic Electronic Components) offers the highest inventory availability at 134,286 units. This part is AEC-Q200 qualified and RoHS3 compliant, making it suitable for both standard and automotive applications.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 0805 (2012 Metric) package format with identical length (0.079" / 2.00mm) and width (0.049" / 1.25mm) dimensions. Maximum seated height varies between 0.50mm and 0.70mm across substitutes, which is within standard PCB assembly tolerances and does not affect footprint compatibility.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture exposure controls. All listed parts, including the primary RC2012F4021CS, carry MSL 1 rating, meaning they do not require special moisture-controlled storage or handling procedures.

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