RMCS0805FT402R Equivalent & Substitute Parts

Part Overview

The RMCS0805FT402R is a 402 Ohms ±1% 0.125W (1/8W) chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This thick film resistor features anti-sulfur composition and operates across -55°C to 155°C. The part is active in production with 705 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or enhanced power ratings.

Key Parameters

Parameter	Value
Resistance	402 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 to 155°C
Terminations	2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Resistance Value: 402 Ohms (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 to 155°C (exact match required)
Terminations: 2 (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (1/8W Power Rating): Parts meeting all core parameters with identical 0.125W power rating. These include RMCF0805FT402R (Stackpole, automotive AEC-Q200), AC0805FR-07402RL (YAGEO, automotive AEC-Q200 with moisture resistance), CRCW0805402RFKEA (Vishay Dale, automotive AEC-Q200), CRCW0805402RFKTA (Vishay Dale, automotive AEC-Q200), ERJ-6ENF4020V (Panasonic, automotive AEC-Q200), and RC0805FR-07402RL (YAGEO, moisture resistant).

Category B - Enhanced Power Rating (1/2W Power Rating): Parts meeting all core parameters except power rating, which is increased to 0.5W. These include CRCW0805402RFKEAHP (Vishay Dale, automotive AEC-Q200 with pulse withstanding) and RCS0805402RFKEA (Vishay Dale, automotive AEC-Q200 with pulse withstanding). These parts are suitable for applications requiring higher transient energy absorption while maintaining identical footprint and electrical characteristics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Tolerance	Power (Watts)	Package	Composition	Temp Coeff	Operating Temp	Height Max	RoHS Status	Features
RMCS0805FT402R	Stackpole Electronics Inc	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.024"	ROHS3	Anti-Sulfur
RMCF0805FT402R	Stackpole Electronics Inc	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.026"	ROHS3	Automotive AEC-Q200
AC0805FR-07402RL	YAGEO	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.024"	ROHS3	Automotive AEC-Q200, Moisture Resistant
CRCW0805402RFKEA	Vishay Dale	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.020"	ROHS3	Automotive AEC-Q200
CRCW0805402RFKEAHP	Vishay Dale	402 Ω	±1%	0.5W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.020"	ROHS3	Automotive AEC-Q200, Pulse Withstanding
CRCW0805402RFKTA	Vishay Dale	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.020"	RoHS Non-Compliant	Automotive AEC-Q200
ERJ-6ENF4020V	Panasonic Electronic Components	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.028"	ROHS3	Automotive AEC-Q200
RC0805FR-07402RL	YAGEO	402 Ω	±1%	0.125W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.024"	ROHS3	Moisture Resistant
RCS0805402RFKEA	Vishay Dale	402 Ω	±1%	0.5W	0805	Thick Film	±100ppm/°C	-55°C ~ 155°C	0.020"	ROHS3	Automotive AEC-Q200, Pulse Withstanding

Engineering Selection Recommendations

For RoHS3 Compliant Applications: RMCF0805FT402R, AC0805FR-07402RL, CRCW0805402RFKEA, ERJ-6ENF4020V, RC0805FR-07402RL, CRCW0805402RFKEAHP, and RCS0805402RFKEA are all ROHS3 compliant and suitable for applications requiring regulatory compliance.

For Automotive Applications: RMCF0805FT402R, AC0805FR-07402RL, CRCW0805402RFKEA, CRCW0805402RFKTA, ERJ-6ENF4020V, CRCW0805402RFKEAHP, and RCS0805402RFKEA carry AEC-Q200 automotive qualification. CRCW0805402RFKTA is RoHS non-compliant and REACH affected; use only where automotive legacy requirements permit.

For Moisture-Sensitive Environments: AC0805FR-07402RL and RC0805FR-07402RL feature moisture-resistant composition, providing enhanced performance in high-humidity or corrosive environments.

For Enhanced Transient Performance: CRCW0805402RFKEAHP and RCS0805402RFKEA provide 0.5W power rating with pulse withstanding capability, suitable for circuits experiencing transient overvoltage or current spikes while maintaining 0805 footprint compatibility.

For Standard Industrial Applications: RC0805FR-07402RL offers moisture resistance without automotive qualification, suitable for general industrial and consumer applications requiring ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I substitute RMCS0805FT402R with a 1/2W rated part like CRCW0805402RFKEAHP?

A: Yes. CRCW0805402RFKEAHP maintains identical resistance, tolerance, package, composition, temperature coefficient, and operating temperature range. The increased 0.5W power rating is a superset of the original 0.125W specification and does not affect electrical compatibility. The 0805 footprint remains identical. Use this substitution when circuit design requires enhanced transient energy absorption.

Q: What is the difference between automotive AEC-Q200 qualified parts and non-qualified parts?

A: AEC-Q200 qualification indicates the part meets automotive industry reliability and performance standards including thermal cycling, humidity bias, and mechanical stress testing. Parts carrying this rating (RMCF0805FT402R, AC0805FR-07402RL, CRCW0805402RFKEA, CRCW0805402RFKTA, ERJ-6ENF4020V, CRCW0805402RFKEAHP, RCS0805402RFKEA) are suitable for automotive applications. Non-qualified parts (RC0805FR-07402RL) are suitable for industrial and consumer applications.

Q: Are all substitute parts pin-compatible with RMCS0805FT402R?

A: Yes. All listed substitutes use the 0805 (2012 Metric) package with 2 terminations, ensuring identical PCB footprint and pin compatibility. Height variations (0.020" to 0.028" maximum seated height) are within standard 0805 package tolerances and do not affect assembly or functionality.

Q: Which substitute offers the best moisture resistance?

A: AC0805FR-07402RL and RC0805FR-07402RL both feature moisture-resistant thick film composition. AC0805FR-07402RL additionally carries AEC-Q200 automotive qualification, making it suitable for moisture-sensitive automotive applications. RC0805FR-07402RL is optimized for industrial and consumer applications requiring moisture resistance.

Q: Can I use CRCW0805402RFKTA as a direct replacement?

A: CRCW0805402RFKTA is electrically and mechanically compatible but is RoHS non-compliant and REACH affected. Use only in applications where legacy automotive or industrial standards permit non-compliant components. For new designs, select ROHS3 compliant alternatives.

Q: What is the difference between anti-sulfur and moisture-resistant features?

A: Anti-sulfur composition (RMCS0805FT402R) protects against sulfur-containing atmospheric corrosion, common in industrial environments. Moisture-resistant composition (AC0805FR-07402RL, RC0805FR-07402RL) provides enhanced performance in high-humidity environments. These features address different environmental stressors and may be selected based on application location and exposure conditions.

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