SSPC Technical Specifications

Enter specifications

• Voltage drop refers to the voltage applied to the input when it is equal to or lower than this voltage (ensuring that the output is in the "off" state). Also known as the need to release voltage or turn off voltage. This voltage is considered to be the "noise resistance" level of SSPC. Differential pressure is very important for selection, as it does not have to be zero to make the output zero. If a voltage is applied, the device must have an appropriate voltage drop to turn on or off the output, but the device will only provide output before the voltage exceeds the voltage drop or a "power down" voltage occurs.
• The input current is the scope of device design work.
• The input voltage is a voltage range, and when a voltage is applied to the input terminal, it will remain in the "on" state on the output terminal. This parameter is also used to defineSSPCThe absolute limit of input voltage that can be sustained without damage. Also known as "mandatory operation", "picking up" or "connecting" voltage.

• The load voltage (maximum switch voltage, line voltage) is the voltage range of the output power supply for normal operation of SSPC.

• The maximum load current (maximum switch voltage range, maximum switch current) is the maximum continuous current allowed on the SSPC output terminal under specified heat dissipation and ambient temperature conditions.
  
  

Enable switching

• Instant Start - Immediately turn on the load when the starting voltage appears. Used to control inductive loads.
• Peak Switching - When there is a control voltage and the voltage is at its peak, the load is turned on. Used to control heavy-duty inductive loads that require large surge currents.
• Random turn-on - Random switching is particularly important for inductive loads (transformers, etc.).
• Zero switch - Switching through the zero position when the polarity of the AC load voltage or current changes. Used to control resistive loads, such as heating elements and lighting fixtures, to prevent large currents from flowing in.

Output specifications

• The load voltage is a constant voltage that SSPC will provide to the load. Improper load voltage can lead to operational issues and even damage.SSPCUse switches to regulate the output voltage, so that the output voltage is constant and the transmission of power to the output is as efficient as possible.
• The maximum load current is the maximum amount of current that can be applied to the load. The larger the load, the greater the current required to operate at maximum capacity. A larger current consumption will cause SSPC to shut down for fault protection.
• The device used to switch outputs.
• Metal oxide field-effect transistor (MOSFET) - a type of field-effect transistor in which the insulating layer between the gate electrode and the channel is a metal oxide layer. The reason for using MOSFETs is that they consume very little power, making them the most efficient.
• Bipolar Transistor (BJT) - a three terminal device in which the current from the emitter to the collector is controlled by the base current. BJT is the predecessor of FET or field-effect transistor (such as MOSFET), and due to its easier manufacturing, it has higher linearity and lower price than MOSFET, so it is still widely used.
• Controllable silicon rectifier (SCR) - SCR is a three terminal active device that acts as a gate diode. The gate terminal is used to turn on the power of the device, allowing current to flow from the cathode to the anode.
• Bi directional thyristor - Bi directional thyristor is a bidirectional gate controlled thyristor. It is similar to SCR, but can conduct bidirectionally. It provides full wave control of alternating current.

SSPC standard

Solid state power controllers must comply with certain standards to ensure proper design and functionality. For example, BS ISO 8816 describes the general requirements for solid-state power controllers in aircraft, while ISO 27027 describes the general performance requirements for SSPCs in the aerospace industry.