VS-ST173C12CFP0

Current - Hold (Ih) (Max):	600mA
Base Part Number:	ST173C*C
Supplier Device Package:	TO-200AB, A-PUK
Package / Case:	TO-200AB, A-PUK
Mounting Type:	Chassis Mount
Operating Temperature:	-40°C ~ 125°C
SCR Type:	Standard Recovery
Current - Non Rep. Surge 50, 60Hz (Itsm):	4680A, 4900A
Current - Off State (Max):	40mA
Series:	--
Current - On State (It (RMS)) (Max):	610A
Current - On State (It (AV)) (Max):	330A
Voltage - On State (Vtm) (Max):	2.07V
Current - Gate Trigger (Igt) (Max):	200mA
Voltage - Gate Trigger (Vgt) (Max):	3V
Voltage - Off State:	1.2kV
Part Status:	Active
Packaging:	Bulk

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.VS-ST173C12CFP0 Application Field and Working PrincipleThyristors, also known as Silicon Controlled Rectifiers (SCRs) are electronic components typically used to control the power output of an electrical circuit. They are three-terminal devices with a gate, an anode and a cathode, and can operate in both forward- and reverse-biased conditions. The VS-ST173C12CFP0 is a Thyristor specifically designed for the switching power supplies used in commercial equipment, computers and household appliances.VS-ST173C12CFP0 Applications:The VS-ST173C12CFP0 Thyristor is primarily used in switching power supplies with up to 3.3 kW output power. These supplies typically contain a number of switch-mode power supply stages that convert the incoming low-voltage AC power to a higher voltage DC output. The Thyristor is used for controlling the on/off state of the power supply and regulating the current flow. It can be used in forward- or reverse-mode conditions, depending on the application.In forward-mode operation, the VS-ST173C12CFP0 Thyristor acts as an electronic switch, allowing current to flow in one direction. This mode of operation is mainly used when controlling small loads such as lamps and other small electronic devices.In reverse-mode operation, the Thyristor acts as an electronic switch, allowing current to be cut off in one direction and then in the other. This mode of operation is mainly used when controlling larger loads such as motors or transformers.Furthermore, the Thyristor is suitable for the following applications:• Power supply for HVAC systems• Switch-mode power supplies for computers and household equipment• Automotive electronics• Industrial motor control• Power converters and invertersVS-ST173C12CFP0 Working Principle:The basic functioning of theVS-ST173C12CFP0 Thyristor is simple and straightforward.The Thyristor consists of two layers of semiconductor material with a metal gate between them. When a positive bias voltage is applied to the gate, the Thyristor gets triggered and the two layers of semiconductor material form a “bridge” that allows current to flow. To turn off the Thyristor, the bias voltage must be reversed.The Thyristor acts as an electronic switch and is triggered at a specific threshold voltage. This threshold voltage, or trigger point, determines the load current that the Thyristor can carry and must be chosen according to the application.The Thyristor also has two protection circuits inside. One is designed to protect the device from excessive load current and the other is designed to protect the device from transient current spikes.In summary, the VS-ST173C12CFP0 Thyristor is an ideal component for controlling the on/off state of a switching power supply or for regulating the current flow in a wide range of applications. Its simple operation and robust design make it a reliable and cost-effective solution for a variety of industrial power supply needs.

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