TZM5247B-GS18

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The TZM5247B-GS18 is a single Zener diode manufactured by Taiwan Semiconductor. It is designed for use in a wide range of applications, from automotive electronics and consumer electronics to portable devices and industrial equipment. This diode is constructed with a series of closely spaced, thin Zener layers that act as a thin-film impedance matching device, allowing it to pull current from the power source and distribute it evenly among its electrodes.

The TZM5247B-GS18 is a 3 pin device, with two terminals for the anode and cathode and a third terminal, called the guard terminal, that acts as a current limiting resistor. It operates over a wide voltage range, from 30V up to 36V, and can handle up to 500mA of DC current. The maximum reverse leakage current of this diode is 5mA and its forward voltage drop is 0.5V.

This diode is used in a variety of applications, such as voltage regulation, voltage clamping and circuit protection. In voltage regulation applications, it provides a stable reference voltage that prevents the circuit from over-voltage or undervoltage conditions. In voltage clamping circuits, the TZM5247B-GS18 regulates overvoltage pulses by effectively limiting the voltage between two points. It also prevents overloading circuit components with too much current, protecting them from permanent damage.

The TZM5247B-GS18 also has an overvoltage protection feature that is advantageous in high power applications. This feature guards against short-term overvoltages, preventing the system from being damaged. It also offers wide temperature range operation, maintaining its performance over -55°C to 125°C.

The working principle of the TZM5247B-GS18 can be described as follows. When the voltage applied to the anode and cathode terminals exceeds a certain level, the Zener layers switch from a bipolar operation to a unipolar operation. This causes electrons to be drawn from the anode to the Zener layers, forming a depletion region. This region provides a voltage threshold, allowing only current to pass through discrete amounts equal to the voltage threshold, thus regulating the total voltage.

The TZM5247B-GS18 is a versatile single Zener diode offering a number of advantages and features that make it suitable for a wide range of applications. Its wide voltage range, high current handling capacity and overvoltage protection make it especially suitable for power distribution and circuit protection applications, while its low leakage current ensures that it can be used safely in low power applications. Its wide temperature operation range and robust construction ensure that it is reliable and long-lasting, even in extreme conditions.

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