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FA series auxiliary switch

Rated Voltage:DC220V AC220V

Rated Current:10A

Conventional Thermal Current:15A

Breaking Capacity:DC220V/2A/6050,T0.95:300ms,AC220V/10A/6050,Cosφ=0.4

Ambient Temperature:-50℃~+70℃

Withstand Voltage:2500V(50HZ) /1min

Life Cycle:20000


General Instruction
FA series auxiliary switch is improved product of F10 series auxiliary switch. It solved the problems of F10 such as low contact pressure, vulnerable shock-resistance, and instable switch on & off. The FA series auxiliary switch is small and delicate with high reliability and broad applications. In a word, the FK series auxiliary switch is more applicable for controlling switch on & off functions, interlocking and signal circuits of high-voltage switch driving mechanism.

Service Condition
1.Ambient temperature:-40℃~+70℃.
2.Altitude:the installation spot is supposed not to exceed 5000m.
3.Humidity:the average value of relative humidity is max 95%, the average value of vapor pressure is max 2.2kPa in condition within 24 hours.the monthly average value of relative humidity is max 90%, the monthly average value of vapor pressure is max 1.8kPa.
4.Vibration acceleration is max 15m/s2.
5.There should be no evident air pollutions from dust, smoke, corrosives and combustible gas, vapor or salty fog.

Meaning of the Symbol

E.g.: model no. FA-20C01 means FA series, 20 poles, screw plug-in mode, 
10 NO contacts and 10 NC contacts.

Technical Parameters

Rated current


Conventional thermal current


Rated voltage






Making and breaking capacity







Withstand voltage

2500V(50Hz) /1min

Lifespan  times


Structure Features
FA series auxiliary switch is made up of multi-units with same structures. The moving contact adopts good phosphor bronze, the stable contact is made of superior brass, and the insulation plate is made of superior inflaming retarding polycarbonate material with high strength, good insulation and heat-resistance. Moreover, the reasonable structure of the switch ensures excellent dust-proof effects.

Working Principles
FA series auxiliary switch adopts indirect driving structure, the cam wheel drives to rotate the shaft, which in turn to push the connection rod of switch to cause the movement of contacts, thus to realize controlling of switch on & off functions of the electric circuits.

Installation and Operation
1.The screw holes at the rear of switch enclosures are used to secure switches to the equipment.The switch itself should not be subject to external force; otherwise, it will become deformed and not able to work normally;
2.The terminal number of contacts should be arranged according to the natural number sequence or customized. The switch operation should be within effective angles(0°~90°)
3.The rotating handle should not be subject to axial force, otherwise it will cause switch breakdown thus affect its normal operation.
4.Lead wire for FA auxiliary switch should be adopted plug in connecting. 

Ordering Information
1.Pls indicate product name, specification & model No., quantity; 
2.Pls make sure the dimension of switch, work route and breaking
of contacts etc.
3.Other requirements.

Construction Drawing
n=insulation plate quantity, L=customer's requirements