RMCS0805FT39K2 Equivalent & Substitute Parts

Part Overview

The RMCS0805FT39K2 is a 39.2 kOhms ±1% 0.125W thick film chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This anti-sulfur resistor operates across -55°C to 155°C and is ROHS3 compliant with unlimited moisture sensitivity rating. The part is currently active in production. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design requirements across different application contexts including automotive-grade alternatives.

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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the RMCS0805FT39K2 is determined by the following mandatory parameters:

Resistance Value: 39.2 kOhms (exact match required)
Tolerance: ±1% (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Composition: Thick Film (exact match required)
Temperature Coefficient: ±100ppm/°C (exact match required)
Operating Temperature Range: -55°C ~ 155°C (exact match required)
RoHS Status: ROHS3 Compliant (required for compliance-sensitive applications)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (Same Power Rating 0.125W): Parts with identical electrical and mechanical specifications including 0.125W power rating. These include RMCF0805FT39K2, AC0805FR-0739K2L, CRCW080539K2FKEA, CRCW080539K2FKTA, ERJ-6ENF3922V, and RC0805FR-0739K2L.

Category B - Enhanced Performance (Higher Power Rating 0.5W): CRCW080539K2FKEAHP provides identical electrical parameters with increased 0.5W power rating and pulse withstanding capability, suitable for applications requiring higher power dissipation margins.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Op Temp Range	Features	RoHS	Height Max (mm)
RMCS0805FT39K2	Stackpole Electronics Inc	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Anti-Sulfur	ROHS3	0.60
RMCF0805FT39K2	Stackpole Electronics Inc	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	ROHS3	0.65
AC0805FR-0739K2L	YAGEO	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Moisture Resistant	ROHS3	0.60
CRCW080539K2FKEA	Vishay Dale	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	ROHS3	0.50
CRCW080539K2FKEAHP	Vishay Dale	39.2 kΩ	±1%	0.5	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200, Pulse Withstanding	ROHS3	0.50
CRCW080539K2FKTA	Vishay Dale	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	RoHS Non-compliant	0.50
ERJ-6ENF3922V	Panasonic Electronic Components	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Automotive AEC-Q200	ROHS3	0.70
RC0805FR-0739K2L	YAGEO	39.2 kΩ	±1%	0.125	0805	±100ppm/°C	-55~155°C	Moisture Resistant	ROHS3	0.60

Engineering Selection Recommendations

For ROHS3 Compliant Applications: RMCF0805FT39K2, AC0805FR-0739K2L, CRCW080539K2FKEA, ERJ-6ENF3922V, and RC0805FR-0739K2L are all ROHS3 compliant and directly substitutable for the RMCS0805FT39K2 with identical electrical specifications.

For Automotive Applications: RMCF0805FT39K2, AC0805FR-0739K2L, CRCW080539K2FKEA, CRCW080539K2FKEAHP, and ERJ-6ENF3922V carry AEC-Q200 automotive qualification ratings, providing enhanced reliability assurance for automotive-grade designs.

For Higher Power Dissipation Requirements: CRCW080539K2FKEAHP offers 0.5W power rating with pulse withstanding capability while maintaining all other electrical parameters identical to the main part, suitable for applications requiring increased thermal margin.

For Non-Compliant Legacy Designs: CRCW080539K2FKTA is electrically equivalent but RoHS non-compliant and REACH affected; use only where legacy compliance status is explicitly required.

For Moisture-Resistant Applications: AC0805FR-0739K2L and RC0805FR-0739K2L include moisture-resistant features in addition to standard specifications.

Frequently Asked Questions (FAQ)

Q: Can RMCF0805FT39K2 replace RMCS0805FT39K2 directly?

A: Yes. Both parts share identical resistance (39.2 kΩ), tolerance (±1%), power rating (0.125W), package (0805), temperature coefficient (±100ppm/°C), operating range (-55°C to 155°C), and RoHS3 compliance. RMCF0805FT39K2 adds automotive AEC-Q200 qualification.

Q: What is the difference between CRCW080539K2FKEA and CRCW080539K2FKEAHP?

A: Both are Vishay Dale parts with identical electrical specifications. CRCW080539K2FKEAHP provides 0.5W power rating versus 0.125W in CRCW080539K2FKEA, and includes pulse withstanding capability. All other parameters remain identical.

Q: Is CRCW080539K2FKTA suitable for new designs?

A: CRCW080539K2FKTA is electrically equivalent but RoHS non-compliant and REACH affected. It is not recommended for new designs requiring RoHS3 compliance. Use only in legacy applications where non-compliant status is explicitly required.

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

A: All substitute parts use the 0805 (2012 Metric) package with identical length (2.00mm) and width (1.25mm). Height variations range from 0.50mm to 0.70mm maximum seated height. Verify PCB clearance for height-sensitive applications.

Q: Which substitute offers the best availability?

A: RMCF0805FT39K2 has the highest inventory at 117,918 pieces. ERJ-6ENF3922V follows with 46,927 pieces. CRCW080539K2FKEA has 20,854 pieces available.

Q: Can I use AC0805FR-0739K2L in place of RMCS0805FT39K2?

A: Yes. AC0805FR-0739K2L is YAGEO equivalent with identical electrical parameters, ROHS3 compliance, AEC-Q200 automotive qualification, and moisture-resistant features. It is a direct substitute.

Q: What is the temperature coefficient significance?

A: All listed parts including the main part and substitutes share ±100ppm/°C temperature coefficient. This ensures consistent resistance stability across the -55°C to 155°C operating range, making them interchangeable from a thermal performance perspective.

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