SM15T12AY

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TVS - Diodes or Transient Voltage Suppressor Diodes, are a type of semiconductor diode designed to protect a voltage sensitive device from electrical transients in the form of bumps or surges in voltage. The SM15T12AY is a bidirectional unidirectional TVS diode which is able to limit both positive and negative overshoot voltage surges. It is a 1500W rated diode with an operating voltage of 6-20V they are ideal for suppressing spikes and transient pulses caused by static discharges, ESD (electrostatic discharge), lightning, and other events.

In the modern digital age, internet-connected electrical equipment and components can be vulnerable to electrical surges, causing irreparable damage to the circuitry. TVS diodes such as the SM15T12AY protect against these electrical spikes. Acting as a gatekeeper that is installed between the power supply unit and the protected circuit, the TVS diode rapidly absorbs the electrical surge. This redirects the electrical power away from the other circuitry, and diverts the energy down into the ground. By doing this, the SM15T12AY prevents transformer failure, incoming power failure, and devices burnout due to electrical surges.

The SM15T12AY is able to handle a maximum clamping voltage of 25.1V, which is independent of the junction capacitance. The working principles of the SM15T12AY are simple yet effective. The working principle involves a breakdown voltage which is designed to snap, or trigger the device, withstanding or allowing the electrical surge to jump to a higher level. This affects the PN junction by reversing the direction and forms a low resistance shunt which diverts the surge to the ground. Therefore, any voltage waveform above the breakdown voltage is diverted while allowing everything below this voltage to pass.

The SM15T12AY provides several advantages, such as a low profile and low capacitance structure, small size, high surge capability, and low clamping voltage. With these features and more, the SM15T12AY can be used for surge protection for a wide range of electronic devices such as AC/DC adaptors, telecommunication ports, and mobile devices. The SM15T12AY is also RoHS compliant, halogen-free, and lead-free.

Due to its versatility and effectiveness, the SM15T12AY is a highly sought-after unidirectional TVS diode. As component density continues to increase, the need for effective surge protection is also likely to increase. TVS diodes have become an essential part of many system designs as they remain the most effective method of protecting systems from voltage transients such as ESD, lightning, and electrostatic discharge.

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