2N2329

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Thyristors are elements of electrical semiconductors that are triggered by an input current or voltage, and are characterized by the ability to block currents flow in one direction, without blocking those who go in the opposite direction. Among them, the SCRs (or Silicon Controlled Rectifiers), are basically bi-directional switches, capable of working with AC, DC and pulsed voltages. They are triggered using low current pulses, and can be used in blocking, unblocking, fire and cut-off modes.

2N2329 is a type of medium-power SCR, manufactured by companies such as ON Semiconductor and New Jersey Semiconductor. It is a medium-power bidirectional thyristor switch-controlled by an external trigger on the GATE terminal. 2N2329 has a maximum blocking voltage of 600V, a maximum pulsed current of 16A, while ripple peak forward current is rated at 5A.

2N2329 can be used in a broad range of applications, as it’s versatile feature that allows controlling AC or DC currents, from very low to high range. It can be applicable to induction cooking, solar power systems, communications systems, solar energy, welding equipment, lighting control, rectification, audio and heat control, medical equipment, and industrial applications.

The working principle of 2N2329 SCR is relatively simple. It maintains the OFF state until an external current is applied to the "gate" terminal. When an external current on the GATE terminal exceeds a minimum value, the SCR becomes conductive, even after the removal of the applied external current. This is possible due to the charge stored inside the SCR structure. Removal of the triggering current therefore only affects the current in the "gate" terminal, and not the main current.

However, this conduction doesn’t last forever. The time it can remain conducting is determined by both the temperature and the applied voltage, and it acts until the voltage value drops below the holding voltage, or until thermal shutdown is activated. Even so, those are predetermined values and ensure the device operates safely. Once this happens, the conduction stops and the SCR turns off again.

2N2329 represents one of the best solutions when it comes to controlling currents, and it is used in a lot of devices and technologies due its ability to provide safety and high performance in areas like lighting, induction cookers, communications and solar energy.

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