1PMT4108C/TR7

Series:	POWERMITE®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	14V
Tolerance:	±2%
Power - Max:	1W
Impedance (Max) (Zzt):	200 Ohms
Current - Reverse Leakage @ Vr:	50nA @ 10.65V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-216AA
Supplier Device Package:	DO-216

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Diodes - Zener - Single Application Field and Working Principle

A diode is an electrical component used to conduct current in only one direction through the device. The diode in its simplest form contains two electrodes, the anode and the cathode, which form the P-N junction. It is this P-N junction that allows the one-way current flow due to the interaction of electrons and electron holes on the junction. One type of diode is the Zener diode.The Zener diode, often abbreviated as “ZD”, is specially designed to pass the current in both directions, with the voltage across it in either direction ranging from the break down voltage to maximum reverse breakdown voltage. It is composed of an N-type semiconductor and a P-type semiconductor into which some impurity has been introduced, which produces the breakdown voltage. This impurity is known as the Zener impurity.The 1PMT4108C/TR7 is a Zener diode produced by Diodes Inc. This device is a single Zener diode with a Zener voltage of 8.2V and is rated for 500 mW of power. The device has a maximum reverse operating current of 20 µA, a temperature coefficient of 0.082V/°C and its maximum operating temperature is +150°C. It is housed in a plastic SOT-23 package, making it ideal for low power circuits.A Zener diode can be used as a voltage regulator in circuits. For example, when emitter-base junction of a transistor is connected to a Zener diode, the Zener diode ensures that the emitter-base junction of the transistor always remains at the desired value. The actual breakdown voltage of the diode can be adjusted by changing the reverse voltage applied to it. In this way, the Zener diode serves as a variable resistor, allowing it to regulate the output voltage of the circuit.Additionally, the Zener diode can be used as a voltage reference in circuits. By adjusting the reverse voltage applied to the Zener diode, the breakdown voltage of the device can be adjusted accordingly, allowing for it to act as a voltage reference. This is especially useful for circuits that require precise calibration of supply or reference voltages, such as in power systems.Zener diodes also find use in clipper circuits, where an abrupt voltage cut-off is required in the output waveform. Zener diodes are relatively fast and can easily be used to limit the peak voltage of a waveform. The Zener diode helps clip the waveform’s peak voltage and the voltage is maintained at a constant value until the capacitor in the output is discharged again. Thus the waveform stays constant with minimal overshoot.Finally, the Zener diode can be used as a temperature sensor since its breakdown voltage may change when the heat generated within a circuit rises. This can be used to monitor and regulate the temperature of a circuit.Overall, the 1PMT4108C/TR7 Zener diode is a versatile device, capable of being used for a variety of purposes ranging from regulating, reference and temperature sensing. Its low power dissipation and small size make it an ideal choice for low power circuits.

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