SMPZ3919B-M3/85A

The SMPZ3919B-M3/85A is a single zener diode from NXP that is used in many industries. This diode is a medium power of 1.2009 W and, a voltage of 11.4 V. It features a Maximum Reverse Voltage of 33 V, a Maximum Forward Voltage of 1.1 V and a low voltage coefficient of 0.007. The SMPZ3919B-M3/85A is ideal for applications such as over-voltage protection, signal clipper without the need for a cathode bias resistor, load switch applications, back-to-back surge protection, stabilized power supplies, post-regulator applications and switching DC-DC converters.

The SMPZ3919B-M3/85A is designed to deliver incredibly low reverse leakage current to less than 0.01uA at 33V. Additionally, the device will not self-trigger in most applications and remains in normal operation with a forward current of up to 3A.

The working principle of the SMPZ3919B-M3/85A is that when a small voltage applied to the diode pulls it out of the reverse breakdown region. This ultimately increases the reverse leakage current through the diode. As the voltage rises, the current through the device also rises. When the voltage reaches the zener voltage of the diode, the current through the diode will remain steady even when the voltage further increases.

As the zener diode increases in current, it heats up and the zener voltage drops along with the current. This is known as the zener effect and is an important feature of the single zener diode. The zener effect helps to stabilize the voltage and keep it at a fixed level regardless of what the voltage is on the input side of the device.

The SMPZ3919B-M3/85A has a wide range of applications in various industries. The diode can be used in voltage regulators, voltage references, overvoltage protection circuits, voltage shunts, post regulators, and reverse current protection.

The SMPZ3919B-M3/85A is an important component in many industrial applications and is designed to deliver incredibly low reverse leakage current and reliable performance. The working principle of the device helps to stabilize the voltage and keep it at a fixed level regardless of what the voltage is on the input side of the device.