V120ZA05

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TVS (Transient Voltage Suppressors) are devices used to protect electronic circuits against voltage transients such as electrostatic discharge (ESD), lightning, overvoltage, and other types of electrical surges. Varistors, also known as voltage-dependent resistors (VDRs), are nonlinear two-terminal devices with a feature called “self-limiting” that can absorb and dissipate transient energy with a minimal overshoot. MOVs (Metal Oxide Varistors) are a subset of Varistors that use a metal oxide material as the active semiconductor element.

The V120ZA05 is a part of the Diotec Semiconductor V-series of Varistors, and is a 150VAC, P3A (10/1000 μs), 17.5mm diameter disk device designed for use in consumer electronics and household appliances. It is constructed with a ceramic body and two metal terminals and has a typical standby leakage current of 2.6µA @ 120VAC. The device also has an operational temperature range of -55 to 125°C and an operating voltage range of 6 to 1500V.

The V120ZA05’s primary application field is for protection against ESD, electrical surges, and other transient voltages. Specifically, the device is suitable for use as an ESD protector in mobile devices, laptops, tablets, cameras, and other consumer electronics. The V120ZA05 can also be used in critical circuit protection applications, such as in automotive electronics and household appliances.

The working principle of the V120ZA05 is based on the principle of Varistors, where voltage applied across the device’s terminals causes a decrease in its internal resistance. When transient overvoltages or surges occur, the V120ZA05’s internal resistance decreases and consequently increases its current flow, allowing the energy of the surge to pass through the device. Since Varistors are self-limiting, they will not allow a current to flow which is greater than their rated current.

Once the overvoltage event is over, the V120ZA05 will hold it’s current state until the voltage is removed, at which point the device’s internal resistance returns to its normal state. This ensures that the device does not suffer from any degradation during the event, allowing for safe and reliable usage. The device also has a very fast response time which makes it suitable for use in a wide range of applications.

In summary, the V120ZA05 is a 17.5mm diameter metal-oxide Varistor designed to protect circuits from ESD, electrical surges, and other transient voltages. It is suitable for a wide range of applications, including consumer electronics, automotive electronics, and critical circuit protection applications. The device works on the principle of Varistors, where the device’s internal resistance decreases in the presence of a surge, allowing it to absorb and dissipate the energy quickly and safely.

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