0071.1241.T2

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TVS (transient voltage suppression) devices are used to protect sensitive circuits from impulse voltages. Such voltage impulses may be caused by static electricity, power supply surges, lightning, circuit switching, and electromagnetic interference. TVS devices can be divided into three broad categories or technologies: Varistors (also called voltage dependent resistors or VDRs), MOVs (metal oxide varistors) , and Transil diodes.

0071.1241.T2 belongs to the Varistor category. Varistors are also known as voltage dependent resistors or VDRs. They are non-linear, resistor like components that have a very wide range of dynamic resistance. This dynamic resistance is strongly dependent on the applied voltage. The resistance of the varistor increases rapidly when the voltage reaches its clamp voltage and the current it can conduct is limited to a safe level.

0071.1241.T2 varistors are designed to protect electronic circuits from excessive voltage by acting like variable resistors. They have a higher breakdown voltage and can reduce the voltage spikes in power supply circuits. They are designed to absorb currents which can occur due to sudden transients or overvoltages in DC and AC circuits. When the voltage across the device reaches its clamp voltage, the VDR’s resistance drops to a very low value, quickly diverting the excess charge away from the protected circuit.

In addition to its voltage dependent dynamic resistance, a varistor also has a static resistance, a parasitic capacitance and an inductance. These values vary depending on the type of material used. The most common type of varistor is the PTC (positive temperature coefficient) type, which has a negative temperature coefficient or PTC resistance, and is able to respond quickly to changes in temperature. The varistor also has an insulation breakdown voltage, which is the point at which the device will no longer be able to protect the circuit from a surge.

The 0071.1241.T2 varistor has a range of typical specifications to help identify it against other types of varistors. Its maximum operating voltage is 175V AC, and its insulation breakdown voltage is greater than 7.9KV. It also has a typical leakage current of ≤500 nA, and a temperature coefficient of -2.6%.

In conclusion, the 0071.1241.T2 varistor is an essential device that can protect circuits from high voltage transients or surges. It has a non-linear dynamic resistance which is strongly dependent on the applied voltage, along with static resistance, parasitic capacitance and inductance. It is able to respond quickly to changes in temperature and has insulation breakdown voltage which is greater than 7.9KV.

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