JAN1N4954D

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The JAN1N4954D is a silicon, high-quality, high-reliability voltage regulator diode, belonging to the range of high-power Zener diodes in the 68 V to 91 V voltage range. It is widely used in applications such as on-board power sources, automatic train control, and frequency synthesizers due to its reliable performance. The JAN1N4954D has an RMS power dissipation of 5 W, a breakdown voltage of 68 V to 91 V, and a surge overload capability of 25 A.

Unlike any other electronics devices, the JAN1N4954D does not operate through mechanical-type components, but instead use electrical power. It works by allowing a maximum reverse current to flow through it when the pinch-off voltage is reached. This flow of current is what keeps the voltage applied to the JAN1N4954D stable. The reverse current flow through the device acts as a regulating force and keeps the voltage constant even when the applied voltage or load current changes.

The JAN1N4954D starts to conduct when the applied reverse voltage exceeds a certain limit. This limit is known as the breakdown voltage and depending on the device, is typically between 6 to 8 V. When the current passes through the diode, it is able to maintain the voltage by allowing only a certain amount of current to pass through it, thus maintaining the voltage at its junction. This is known as the Zener effect and is a result of the breakdown behaviour of the diode.

The JAN1N4954D also features a enhanced power dissipation capacity up to 5 watts (without derating) and surge overload capability of 25 A at its peak voltage. This feature makes the JAN1N4954D a great device for use in applications that require high power dissipation and robustness, such as on-board power sources and automatic train control systems.

The JAN1N4954D is therefore a much sought-after device, thanks to its excellent performance and reliability. It is widely used in voltage regulator circuits, frequency synthesizers, stabilizers, and many other types of circuits due to its high surge, reverse current, and voltage regulator capabilities. This is all thanks to its Zener effect, which allows the device to regulate and maintain/filter constant, stable output voltages.

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