VS-ST083S08MFM0

Current - On State (It (RMS)) (Max):	135A
Supplier Device Package:	TO-209AC (TO-94)
Package / Case:	TO-209AC, TO-94-4, Stud
Mounting Type:	Chassis, Stud Mount
Operating Temperature:	-40°C ~ 125°C
SCR Type:	Standard Recovery
Current - Non Rep. Surge 50, 60Hz (Itsm):	2060A, 2160A
Current - Off State (Max):	30mA
Current - Hold (Ih) (Max):	600mA
Series:	--
Current - On State (It (AV)) (Max):	85A
Voltage - On State (Vtm) (Max):	2.15V
Current - Gate Trigger (Igt) (Max):	200mA
Voltage - Gate Trigger (Vgt) (Max):	3V
Voltage - Off State:	800V
Part Status:	Active
Packaging:	Bulk

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Thyristors - SCRs

The SCR (Silicon Controlled Rectifier) is a three-terminal semiconductor device that acts as a switch that can be used to control the flow of current. As a member of the thyristor family, the SCR is similar to the thyristor, but it differs in that the SCR takes an additional control terminal which can be used to turn the device on and off. The VS-ST083S08MFM0 is a SCR designed for on-off control and line voltage applications. It is a three-terminal device with two anode-cathode leads, an externally isolated gate control lead, and isolated mounting tab.

Application Fields

The VS-ST083S08MFM0 SCR is commonly used in home appliances and industry to control large amounts of current in a variety of applications. It is used in relays and indicator lights, high power controls, electro-mechanical motor control and arc welding monitors. In addition to its use in industrial settings, the VS-ST083S08MFM0 SCR is also used in a variety of electrical and electronic circuits, including AC current controllers, lamp dimmers and controls, solenoid and motor starters, power supplies, speech and signal processing circuits, switching voltage regulators and timing circuits.

Working Principle

The principle of operation for the VS-ST083S08MFM0 SCR is very simple. The device is off when it is not conducting, and as soon as a small amount of current is passed through the gate lead of the device a large current can be passed through the two anode-cathode leads. This large current cannot be removed unless the gate signal is removed by either the gate control lead or floating the lead to ground. The VS-ST083S08MFM0 can be turned off simply by removing the gate signal, or by shorting the gate control lead to the mounting tab.The operation of the VS-ST083S08MFM0 SCR involves the movement of charge carriers in the form of electrons and holes. When the gate signal is at a lower potential than that across the anode and cathode, the diode from the gate to the cathode is reverse biased, and no current can flow. This results in the device being in its off state. When the gate voltage is made more positive than the anode, the diode from the gate to the cathode becomes forward biased and current flows, turning the device on. This current, known as gate current, is generally very small (typically less than 1mA).The forward bias of the anode junction formed by the anode and cathode when the gate signal is present increases the potential barrier across the anode and cathode junction and thus reduces the amount of current that can flow through the device. This is known as the “holding current” of the device. Once the holding current is exceeded, the potential barrier is overcome and the device is said to be turned on and is able to conduct current.

Conclusion

As a member of the thyristor family, the VS-ST083S08MFM0 SCR is a reliable control device in small appliances and commercially available. Its external gate and mounting tab allow for easy access and ease of use, and its small and easy-to-use design make it suitable for a wide range of applications. The device can be used for on-off control and line voltage applications, and its working principle involves the movement of charge carriers between an anode and a cathode in order to turn the device on and off.

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