2N6403TG

Current - Hold (Ih) (Max):	40mA
Base Part Number:	2N6403
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
SCR Type:	Standard Recovery
Current - Non Rep. Surge 50, 60Hz (Itsm):	160A @ 60Hz
Current - Off State (Max):	10µA
Series:	--
Current - On State (It (RMS)) (Max):	16A
Current - On State (It (AV)) (Max):	10A
Voltage - On State (Vtm) (Max):	1.7V
Current - Gate Trigger (Igt) (Max):	30mA
Voltage - Gate Trigger (Vgt) (Max):	1.5V
Voltage - Off State:	400V
Part Status:	Active
Packaging:	Tube

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Thyristors - SCRs

A silicon-controlled rectifier (SCR) or thyristor is a type of electronic component which blocks or passes the flow of power between circuits in one direction, then allows circuit reversal. It is a controlled switching device, which finds widespread application in power conversion, motor speed control and telecommunications. The 2N6403TG is a type of SCR with a high voltage reverse blocking capability and a high surge current rating. It is commonly used in various applications such as control of power electronics and other digital products.

The 2N6403TG is a 3-terminal device composed of a PNPN, or four-layer, silicon chip. It consists of an anode and a cathode terminal, and an internal gate terminal. The anode and cathode are connected to the two main power lines of the circuit. The anode is the main power input to the device, and the cathode is the output. The internal gate terminal, when supplied with a triggering or gating signal, enables the device to start conducting current in a forward direction and turn off in the reverse direction.

The SCR is widely used in applications such as relays, crowbars, light dimmers, AC motor control, overcurrent protection systems, and telecommunications circuits. In a relay, the SCR is used to control the connection of the relay contacts. When the gate is triggered, the device will turn on and close the circuit, thus completing the relay circuit. In a light dimmer, the gate is triggered by a changing waveform, so that the dimmer can control the dimming of the light.

In AC motor control applications, the 2N6403TG is used to control the speed of the motor by controlling the way it is supplied with power. By modulating the voltage or current waveform to the motor, the device can thus control the speed with precision.

The 2N6403TG is also used in overcurrent protection systems. When a circuit experiences an overload, the SCR switches off the current until the overcurrent passes. This is done by connecting two SCRs connected in anti-parallel. The anti-parallel SCR connection allows current to flow in both directions, so that when the fault current is sensed, the SCR will switch off the current until the fault is removed.

The 2N6403TG is also used in various telecommunications circuits. The device can be used as an amplifier to boost certain frequencies of the signal, as well as a voltage regulator. By connecting parallel SCRs, the device can be used to maintain a constant output by increasing the supply voltage. This type of circuit is commonly used in inverters and rectifiers.

The 2N6403TG has a high reverse break over voltage, which enables it to withstand overvoltages across its terminals. It also has a high surge current rating, which allows it to handle large transient current amplitudes. The device also has low power dissipation, making it an ideal choice for low power applications.

Overall, the 2N6403TG is a high voltage, reverse blocking SCR with a high surge current rating. It is commonly used in applications such as control of power electronics and other digital products, relays, crowbars, light dimmers, overcurrent protection systems, and telecommunications circuits. Its high reverse break over voltage and low power dissipation make it an ideal choice for many applications.

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