1.5KE440ATR

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TVS - Diodes

A Transient Voltage Suppressor Diode (TVS-DIODE) is a specific type of diode designed to protect vulnerable circuits from transients or high-voltage spikes. When reverse-biased, TVS-diodes can conduct and protects the sensitive parts from the voltage overshoot, both positive and negative. This type of diode may be seen as part of any current electronic circuitry, such as a laptop or smart phone.

1.5KE440ATR application field and working principle

The 1.5KE440ATR transient voltage suppressor diode (TVS-diode) is a commercial rectifier diode capable of absorbing ESD or EMI transients. It also provides over voltage and transient protection for sensitive electronic components in applications such as compute peripherals, data communication products, and other precision electronic equipment.

This diode device is capable of suppressing transients up to 400 volts (peak) and is provided in an SMA package, which makes it very convenient for circuit designers. The working principle of this TVS-diode involves peak pulse power dissipation of 5 W, with a very low clamping voltage of about 24 volts for 6 A of peak ipp when operating in the reverse breakdown region.

When the voltage exceeds the breakdown voltage of the 1.5KE440ATR TVS-diode, the device will begin to conduct, limiting the surge with a low clamping voltage. This results in a lower voltage level being applied to the protected device, thus safeguarding it from irreversible damage. The surge energy is dissipated in the form of heat, so the TVS-diode eventually gets heated up and so additional cooling measures have to be taken care of, depending on the application.

This TVS-diode is also known to be more responsive to high-energy impulse noise than the traditional Zeners and avalanche diodes. This is because the voltage-current relationship of a TVS-diode is linear when the voltage exceeds the breakdown voltage, allowing it to respond to sudden spikes in voltage much faster than traditional devices.

Apart from its application in computer peripherals and networking equipment, the 1.5KE440ATR TVS-diode can also be incorporated in automotive and medical systems, as well as in fire and safety systems. This diode provides low reverse leakage for integrated circuit (IC) protection. It can also be used as an unidirectional over voltage protector (OVP), withstanding spikes of up to 400 VTM (Volts Transient Maximum).

Overall, the 1.5KE440ATR TVS-diode offers an efficient, cost-effective solution to suppress transient over-voltage and ESD transients in various application fields, thus providing an additional layer of safety to the circuitry.

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