ST3230C16R0

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Thyristors, also called silicon controlled rectifiers (SCR\'s), are devices which are effectively two-state switches. A thyristor can be switched between an on state, with full current flow, and an off state, where current cannot flow. This is because the device can only be turned on by applying a positive voltage to the gate terminal and only turned off by reducing the current below the holding current.

The ST3230C16R0 is a silicon controlled rectifier (SCR) of the plastic encapsulated type. It is available in a TO-92 package and has a maximum gate trigger current of 1.0A. The maximum reverse voltage is 30V with an on state current of 3A and an off state voltage of -30V. This SCR is suitable for both general purpose switching and light dimming applications.

Application fields

The ST3230C16R0 is used in a wide range of applications, including:

• Heating elements
• High power motors
• Light dimming applications
• Backlighting
• Control of power supplies
• Appliance control
• Switched-mode power supplies
• Inverters
• Telecommunications

Working principle

The ST3230C16R0 is designed to work in two states: an ‘on’ state and an ‘off’ state. In the ‘on’ state the SCR conducts current and the current is regulated by the gate terminal. In this state the current flowing through the device varies as the gate voltage is increased or reduced. In the ‘off’ state the current through the device is blocked and the gate terminal remains open.

The device can be turned on by applying a positive voltage to the gate terminal which will cause the SCR to conduct current. The current is then regulated by the gate terminal. The device can be turned off by reducing the current below the holding current. The holding current is the minimum current required to keep the device in the ‘on’ state.

The ST3230C16R0 also has protection circuits to prevent damage or malfunction in the event of an overcurrent or overvoltage. The device is also protected against short-circuit and reverse voltage.

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