1.5KE120CA-E3/73

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TVS – Diodes are commonly used in computer systems and consumer electronics applications. The 1.5KE120CA-E3/73 is one such example of these types of diodes. It is designed to protect against transient over-voltages caused by electrostatic discharge, as well as high-energy transients caused by lightning, motor switching, and capacitive discharge. This type of device is a two-terminal discrete component, allowing it to both absorb and dissipate transient voltages.

The 1.5KE120CA-E3/73 is intended primarily for use in computer, telecommunications, consumer electronics, and automotive applications including data networks, automotive electronics, circuit breaker panels, ESD, and transient suppressors.

The 1.5KE120CA-E3/73 devices are designed to protect voltage sensitive equipment from damage due to ESD, transients, and power surges. It contains an internal zener diode with a voltage rating of 12V, and a bidirectional thyristor structure with a breakdown voltage of 20V. These devices are able to absorb and dissipate the energy from ESD pulses to safely ground, while also allowing for the operation of the protected circuit. Additionally, these diodes have a low clamping voltage, which is important for preventing power surges from damaging sensitive electronic components.

The 1.5KE120CA-E3/73 device works by using the zener diode to limit the voltage across the thyristor to 12V. This allows the thyristor to turn on for current flows in either direction. When a transient over-voltage is present, the thyristor turns ON and the excess voltage is diverted to ground. With this type of over-voltage protection, the protected circuit is prevented from being damaged by transient voltage spikes. Additionally, the low clamping voltage allows for the protection of sensitive circuitry while maintaining a low power consumption.

In operation, a transient over-voltage is detected when the voltage across the device–known as V[BR]–originates from either an electrostatic or lightning related spike. When this is detected, the thyristor turns on and allows the excess voltage to be diverted to ground. This provides the protected circuit with the necessary over-voltage protection without adding a large amount of power consumption to the system.

In conclusion, the 1.5KE120CA-E3/73 is a two-terminal discrete device designed to protect sensitive systems against transient over-voltages. Its design includes an internal zener diode and a bidirectional thyristor structure. When a transient over-voltage is detected, the thyristor turns on and safely redistributes the excess voltage to ground. With its low clamping voltage, this type of diode is ideal for protecting sensitive circuits while keeping power consumption to a minimum.

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