RCS2012F3922CS Equivalent & Substitute Parts

Part Overview

The RCS2012F3922CS is a 39.2 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) and mechanical compatibility (package size, termination count, operating temperature range). Substitute parts may vary in manufacturer-specific features such as automotive qualification levels, pulse withstanding capabilities, or packaging formats while maintaining functional equivalence.

Key Parameters

Parameter	Value
Resistance	39.2 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 ~ 155°C
Number of Terminations	2
Size / Dimension	0.079" L x 0.049" W (2.00mm x 1.25mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

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

Mandatory Matching Parameters:

Resistance value: 39.2 kOhms
Tolerance: ±1%
Power rating: 0.125W (1/8W)
Package: 0805 (2012 Metric)
Temperature coefficient: ±100ppm/°C
Operating temperature range: -55°C ~ 155°C
Number of terminations: 2
Composition: Thick Film

Allowable Variations:

Manufacturer identity
Specific feature sets (automotive AEC-Q200 qualification, anti-sulfur, pulse withstanding)
Packaging format (Tape & Reel vs. Cut Tape)
Height seated maximum (within mechanical tolerance)
RoHS compliance status (both ROHS3 compliant and non-compliant parts listed)

All identified substitute parts maintain electrical and mechanical compatibility with the RCS2012F3922CS across the mandatory parameters. Variations in optional features and certifications do not affect functional interchangeability in standard applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Temp Coeff	Operating Temp	Height Max	RoHS Status	Packaging	AEC-Q200
RCS2012F3922CS	Samsung Electro-Mechanics	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.66mm	ROHS3	Tape & Reel	No
AC0805FR-0739K2L	YAGEO	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.60mm	ROHS3	Tape & Reel	Yes
CRCW080539K2FKEA	Vishay Dale	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.50mm	ROHS3	Tape & Reel	Yes
CRCW080539K2FKEAHP	Vishay Dale	39.2 kOhms	±1%	0.5W	0805	±100ppm/°C	-55°C ~ 155°C	0.50mm	ROHS3	Tape & Reel	Yes
CRCW080539K2FKTA	Vishay Dale	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.50mm	RoHS non-compliant	Tape & Reel	Yes
ERJ-6ENF3922V	Panasonic Electronic Components	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.70mm	ROHS3	Tape & Reel	Yes
RC0805FR-0739K2L	YAGEO	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.60mm	ROHS3	Cut Tape & Digi-Reel	No
RMCF0805FT39K2	Stackpole Electronics Inc	39.2 kOhms	±1%	0.125W	0805	±100ppm/°C	-55°C ~ 155°C	0.65mm	ROHS3	Tape & Reel	Yes

Engineering Selection Recommendations

Direct Equivalents (0.125W, ±1%, 39.2 kOhms, 0805):

For applications requiring ROHS3 compliance with standard 1/8W power rating, the following parts provide direct functional equivalence:

CRCW080539K2FKEA (Vishay Dale): ROHS3 compliant, AEC-Q200 qualified, compact 0.50mm height, Tape & Reel packaging
AC0805FR-0739K2L (YAGEO): ROHS3 compliant, AEC-Q200 qualified, 0.60mm height, Tape & Reel packaging
ERJ-6ENF3922V (Panasonic Electronic Components): ROHS3 compliant, AEC-Q200 qualified, 0.70mm height, Tape & Reel packaging
RMCF0805FT39K2 (Stackpole Electronics Inc): ROHS3 compliant, AEC-Q200 qualified, 0.65mm height, Tape & Reel packaging

Alternative Packaging Format:

RC0805FR-0739K2L (YAGEO): ROHS3 compliant, Cut Tape & Digi-Reel packaging format, suitable for applications not requiring standard Tape & Reel format

Higher Power Rating Option:

CRCW080539K2FKEAHP (Vishay Dale): ROHS3 compliant, AEC-Q200 qualified, 0.5W (1/2W) power rating with pulse withstanding capability. Use only when higher power dissipation is required; not interchangeable in circuits designed for 0.125W maximum.

Legacy / Non-Compliant Option:

CRCW080539K2FKTA (Vishay Dale): RoHS non-compliant, AEC-Q200 qualified. Use only in applications where RoHS compliance is not mandated.

All recommended substitutes maintain identical electrical performance and mechanical fit within standard PCB assembly processes. Selection should be based on supply availability, cost, and specific compliance requirements of the end application.

Frequently Asked Questions (FAQ)

Q: Can CRCW080539K2FKEAHP (0.5W) be used as a direct replacement for RCS2012F3922CS (0.125W)?

A: CRCW080539K2FKEAHP is electrically equivalent in resistance, tolerance, and temperature coefficient. However, it has a higher power rating (0.5W vs. 0.125W). It can be used in circuits designed for 0.125W operation without functional degradation. Use this part only when higher power dissipation capability is required or when supply constraints necessitate substitution.

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

A: Tape & Reel (TR) packaging is standard for automated pick-and-place assembly on continuous reels. Cut Tape & Digi-Reel packaging provides flexibility for lower-volume or mixed-component assembly. Both formats contain identical components; packaging selection depends on assembly process requirements and order quantities.

Q: Are all substitute parts AEC-Q200 qualified?

A: No. The original RCS2012F3922CS and RC0805FR-0739K2L are not AEC-Q200 qualified. Most substitute parts (CRCW080539K2FKEA, AC0805FR-0739K2L, CRCW080539K2FKEAHP, CRCW080539K2FKTA, ERJ-6ENF3922V, RMCF0805FT39K2) carry AEC-Q200 automotive qualification. AEC-Q200 qualification is not required for non-automotive applications and does not affect interchangeability.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. Most substitute parts are ROHS3 compliant. CRCW080539K2FKTA is RoHS non-compliant and should be used only in applications where RoHS compliance is not required.

Q: Can I substitute based on height differences (0.50mm to 0.70mm)?

A: Yes. All substitute parts maintain the same 0805 (2012 Metric) package footprint and fit standard PCB pad layouts. Height variations (0.50mm to 0.70mm) are within normal manufacturing tolerances and do not affect mechanical fit or electrical performance in standard applications.

Q: Which substitute part has the highest inventory availability?

A: RMCF0805FT39K2 (Stackpole Electronics Inc) has the highest inventory at 117,918 pieces. ERJ-6ENF3922V (Panasonic) has 46,927 pieces. CRCW080539K2FKEA (Vishay Dale) has 20,854 pieces. Inventory levels should be verified with current suppliers for procurement planning.

Q: Are all parts rated for -55°C to 155°C operating temperature?

A: Yes. All listed substitute parts and the original RCS2012F3922CS share identical operating temperature range (-55°C ~ 155°C) and temperature coefficient (±100ppm/°C), ensuring thermal performance equivalence across all applications within this range.

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