1N5945PE3/TR12

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The 1N5945PE3/TR12 Zener diode is a single component designed to regulate and provide constant voltage across electrical circuits in a wide range of applications. It is easily identifiable by its small size, and its use of two pins to connect the component which are intended to be inserted into a breadboard or PCB, depending upon the application. This component is essential for many consumer electronics, such as in power supplies, for bulk regulation and for prevent overvoltage.

Overview of 1N5945PE3/TR12

The 1N5945PE3/TR12 Zener diode features a breakdown voltage of 5.9V and an operating temperature range of -55°C to +150°C. This component is intended to function as a reverse breakdown device that has one low forward voltage drop, low capacitance and a low operating current. The maximum DC power dissipation is 500mW, while its maximum forward voltage is 0.5V, maximum operating temperature is 150°C, and its maximum surge current is 10A.

Application Field

The 1N5945PE3/TR12 Zener diode is used in various circuits in order to protect against overvoltage conditions and regulate electrical supply. When used in a buck-mode switch, it helps to reduce the voltage ripple to acceptable levels. This component is also used in SMPS applications for function as a low-voltage detector or an overcurrent detection circuit. It can also be used as an ESD protection element in many electronics, such as cell phones, tablets and digital cameras.

Working Principle

The 1N5945PE3/TR12 Zener diode operates on the principle of reverse breakdown. During normal forward bias operation, current flows from the anode to the cathode and the device acts as a regular diode. When operating in reverse bias, the device will start to break down at a certain voltage level. This breakdown voltage level is called the Zener voltage. The Zener voltage across the device is nearly constant during operation as long as the breakdown current is constant. When the external voltage exceeds the Zener breakdown voltage level, the Zener diode will start conducting and keeping the voltage across it constant at the Zener voltage level.

Conclusion

The 1N5945PE3/TR12 Zener diode is a useful and versatile component for many applications where surge protection and voltage regulation is required. Due to its small size and low cost, it is easy to integrate this device into a system design or to replace a failed component. Its reverse breakdown principle also allows it to operate at a constant Zener voltage as long as the current is held steady, making it an ideal choice for many electronics.

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