SMF45A-M3-18 Circuit Protection

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TVS diodes are an important component in many electronic equipment. They are primarily used to protect circuits from overvoltage events such as electrical surges, lightning strikes, and transient voltage spikes. The SMF45A-M3-18 is a TVS (transient voltage suppression) diode from Diodes Incorporated and is intended for use in applications requiring surge protection, such as in electronic circuits, DC/DC converters, telecommunications, industrial controllers, and automotive systems.

The SMF45A-M3-18 is a unidirectional transient voltage suppression diode with a maximum pulse power rating of 45 Watts, and a peak output voltage of 18 Volts. It has a forward voltage drop of 700mV at 10A, and a clamping voltage of 23.4V at 10A. The SMF45A-M3-18 has a capacitance of 55pF, a reverse leakage current of 20µA, and a standoff voltage of 4.5 Volts. The device is available in a DO-205AA (SMF) package and is RoHS Compliant.

TVS diodes, such as the SMF45A-M3-18, are designed to shunt surge currents away from connected circuitry. An overvoltage or surge is not dissipated within the diode itself, but quickly shunted away to the ground through the diode’s internal impedance. When an overvoltage event occurs, the diode conducts current between the anode and cathode, effectively reducing the voltage at the anode to its breakdown voltage. This reduces the risk of damage to the protected circuit by transient events. The SMF45A-M3-18 is a fast-acting diode, with an extremely low forward voltage drop and very low “on” resistance. This means that the diode will operate quickly and efficiently when subjected to a surge, allowing the protected circuit to continue operating normally after the event.

TVS diodes, such as the SMF45A-M3-18, can be applied to a variety of systems, including power supplies, automotive systems, telecommunications systems, and more. In all of these applications, the TVS diode serves to protect against transient voltage spikes or surges, which can damage other components in the circuit. Aside from protection, the SMF45A-M3-18 also offers excellent operating characteristics, with high current capacity and a low forward voltage drop. This makes it ideal for applications that require fast response times and robust protection against surges.

In summary, the SMF45A-M3-18 is a unidirectional transient voltage suppression diode from Diodes Incorporated that offers excellent protection against transient voltage surges. It has a peak output voltage of 18 volts, a forward voltage drop of 700mV at 10A, and a capacitance of 55pF. The SMF45A-M3-18 is suitable for a variety of applications, including power supplies, automotive systems, and telecommunications systems. It is an ideal choice for those applications that require fast response times and robust protection against surges.

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