V250LA40APX10 Circuit Protection

TVS (transient voltage suppressors) devices protect sensitive electronic equipment against electrical overstress or transient voltages caused by electrical transients such as lightning, electrostatic discharge, and electrical switching. Varistors, MOVs (metal oxide varistors) are commonly used to protect circuits from voltage transients and electrical overstress. The V250LA40APX10 is a varistor device which can be used for a variety of applications.

The V250LA40APX10 is a 250-volt, 4.0-ohm varistor suitable for use in both AC and DC applications. It is a four-layer, multi-layer, epoxy-encapsulated device with a built-in thermal foldback function. The device is designed for installation on printed circuit boards (PCBs) and is also suitable for mounting on solder boards. It is UL and CSA rated to UL1449 fourth edition and is capable of handling transient voltages up to 8kV.

The V250LA40APX10 is suitable for a wide range of AC and DC applications, including surge and over-voltage protection for electrical, industrial, automotive, and consumer circuits. Some typical applications include: power supplies, motor and power circuit protection, data line protection, and automotive electronic circuit protection. The device can also be used in LED panel lighting, TV receivers, and cell phone protection. The device is also suitable for protecting high-end computers, communications equipment, and consumer electronic products.

The working principle of the V250LA40APX10 is based on the concept of varistor voltage clamping. In a varistor-based circuit, the voltage across the varistor is limited to the breakdown voltage of the device. At low voltages, current passes through the device in the normal direction. When the voltage reaches the device’s breakdown voltage, current is diverted from the varistor and clamps the voltage. This prevents large, damaging voltage transients from entering the circuit and damaging the components. The thermal foldback feature of the device helps to reduce the overcurrent through the device when it is subjected to high-frequency transients.

The V250LA40APX10 is a extremely robust device which can be used for a variety of AC and DC applications, as well as for providing protection against voltage transients and overvoltage conditions. It is also UL rated and suitable for mounting on solder boards and PC boards. The device is capable of handling transient voltages up to 8kV and is also equipped with a thermal foldback feature for added protection.