SMAJ4480E3/TR13

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Diodes are a basic and important part of the electrical and electronic engineering used in a variety of applications. They can be used for rectification, voltage regulation, signal modulation, frequency control, and more. The SMAJ4480E3/TR13 is a single Zener diode from STMicroelectronics. It is a small-signal diode that offers multiple advantages and can be used in various applications.
The diode has an operating junction temperature of -55 °C to 150 °C, a peak reverse power rating of 350 mW, and a peak forward surge power of 400W. Furthermore, its thermal resistance junction to ambient is 145 °C/Watt. The other important specs include a reverse recovery time of 15 ns, a total capacitance of 4.7 pF, a forward current of 150 mA, a voltage drop of 4.7 V, and a reverse current of 100 μA.
The main application field of the SMAJ4480E3/TR13 single Zener diode is for the protection of devices against transient electrical and lighting surges, overvoltage, ESD, and other potential risks. It is also an excellent choice for voltage regulation applications, power converters, and other interfaces requiring reliable operation. In these applications, the diode supports voltage peaks of up to 5.6 V and protects against power surges at a power rating of up to 350 mW. As a bonus, its very small size of 600 μm x 200 μm makes it a perfect choice for tight-space assemblies.
The working principle behind the SMAJ4480E3/TR13 single Zener diode is simple and straightforward. Its main components are a PN junction and a Schottky diode. The PN junction is responsible for providing rectifying action and electron depletion, while the Schottky diode is used as a low-power low-voltage switch at low currents. The PN junction also acts as a voltage regulator, with the diode\'s voltage drop varying depending on the current through it. The Zener effect is used to provide breakdown protection when an in-circuit voltage exceeds its specified limits. At the same time, the Schottky diode ensures that reverse and forward currents don\'t become excessive, which can lead to malfunctions or a short circuit.
Finally, the SMAJ4480E3/TR13 single Zener diode from STMicroelectronics is ideal for a range of applications, particularly those requiring reliable surge, voltage, and temperature protection. Its features include a reverse power rating of 350 mW, a forward surge power of 400W, and a thermal resistance of 145 °C/W. Its small 600 μm x 200 μm size makes it an excellent choice for applications with a limited space, while its Zener and Schottky capabilities enable reliable operation and breakdown protection.

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