ABB Electrical 1SAR111020R8607 R100.20 Semiconductor Contactor

ABB Electrical 1SAR111020R8607 R100.20 Semiconductor Contactor

Basic Principle

Semiconductor contactor is a kind of electrical component that uses semiconductor devices (such as thyristor, transistor, etc.) to control the circuit on and off. Compared with the traditional electromagnetic contactor, it has the advantages of no contact, long life, high reliability and fast response speed. Take thyristor as an example, when the trigger signal is applied to its control pole, the thyristor will conduct between the anode and cathode, thus allowing the current to pass and realise the circuit on; when the trigger signal disappears and the current is reduced to below the maintenance current, the thyristor shuts down and the circuit is disconnected.

Technical parameters

Rated Voltage: There are various rated voltage levels available, the common ones are 24V DC, 110V DC, 220V AC, 380V AC, etc. The specific rated voltage depends on its value. The specific rated voltage value depends on the application scenario and the requirements of the controlled load. For example, in some small automation control systems, 24V DC semiconductor contactors may be used to control DC loads, while in industrial production lines for large motor control, 380V AC semiconductor contactors may be used.

Rated Current: The rated current refers to the amount of current that the semiconductor contactor can normally carry. Different models of 1SAR111020R8607 R100.20 semiconductor contactors have different current ratings, generally ranging from a few amperes to tens of amperes, such as 10A, 20A, 30A, etc. The current rating determines how much current the contactor can carry. The size of the rated current determines the power of the load it can control, for example, for a 220V AC, 10A semiconductor contactor, the maximum power it can control is about 2.2kW resistive load.

On-state voltage drop: When the semiconductor contactor is in the on-state, it will produce a certain voltage drop on both sides of it. The size of the drop affects the efficiency of the circuit and the energy consumption. Generally speaking, the smaller the drop, the better. For example, some high-performance semiconductor contactors can have on-state voltage drops as low as about 1V, which can significantly reduce energy consumption in high-current applications.

Turn-off time: The turn-off time is the time it takes from when the semiconductor contactor receives the turn-off signal to when it is completely turned off. A short turn-off time is important for circuits that require a fast response, such as high-frequency switching power supplies, inverters, etc. 1SAR111020R8607 R100.20 Semiconductor contactors typically have turn-off times in the microsecond to millisecond range, depending on the characteristics of the semiconductor devices inside and the circuit design.

Functional features

Non-contact operation: Due to the use of semiconductor devices as switching elements, there are no mechanical contacts to wear out, arc, etc., thus providing extremely high reliability and long life. This makes it particularly suitable for applications that require high reliability and low maintenance costs, such as automated production lines and lift control systems.

Fast Response: Semiconductor contactors have a very short response time, capable of switching circuits on and off in microseconds. This is very favourable for some loads that require fast control, such as DC motors, solenoids, etc., to achieve precise speed control and position control.

Low noise: in the working process will not produce mechanical contact opening and closing noise, the operation is very quiet, suitable for low noise requirements of the environment, such as offices, laboratories and so on.

Convenient control: It can be easily controlled by various control signals, such as digital signals, analogue signals, and so on, to achieve the control of its on and off. And can be directly connected with microprocessors, PLC and other controllers to achieve intelligent control functions.

Perfect protection function: some semiconductor contactors also have over-current protection, over-voltage protection, overheating protection and other protection functions, which can effectively protect the load and its own safe operation. When there is over-current, over-voltage and other faults, the semiconductor contactor can quickly shut down to avoid the expansion of the fault.

Application Fields

Industrial automation: In the automated production line, it is used to control the on-off of various motors, cylinders, solenoid valves and other executive elements to achieve the automated control of the production process. For example, in the automobile manufacturing workshop welding robot, assembly line and other equipment, semiconductor contactors can accurately control the robot's movements and the rhythm of the production line.

Power electronic equipment: in the switching power supply, inverter, frequency converter and other power electronic equipment, as the core switching components, to achieve the transformation and control of electric energy. For example, in the solar photovoltaic power generation system, the semiconductor contactor in the inverter can convert direct current into alternating current, which can be connected to the power grid for users to use.

Intelligent buildings: In the lighting system, air conditioning system, lift system, etc. of intelligent buildings, it is used to control the operation of various electrical equipment. For example, in the intelligent lighting system, semiconductor contactors can automatically control the switching and brightness of lights according to light intensity, personnel activities and other factors to achieve energy saving and intelligent management.

Transportation: In the field of transportation such as electric vehicles and electric trains, they are used to control the driving and braking of electric motors. For example, in the motor control system of electric vehicles, semiconductor contactors can realise the forward and reverse rotation of the motor, speed regulation and other functions to provide power support for vehicle driving.