V321HG34

TVS - Varistors, MOVs

V321HG34, also known as PTC thermistor (positive temperature coefficient thermistor), is a kind of adjustable and self-limiting circuit element. It is made of a special manganese-based ceramic material, then coated with a protective varnish. It can convert temperature change into resistance value change, and functions as an adjustable fuse. It is widely used in temperature control, temperature protection, and temperature compensation, etc.

Application field

V321HG34 is mainly used in AC/DC equipment, vehicles, washing machines, air conditioner, UPS, LED lighting converter, electric motor, refrigerators, compressor, printer, UPS, and other household appliances and industrial fields.

Working principle

In the common state, V321HG34 is in low resistance. When temperature is in the normal range, V321HG34 acts as a normal conductor, which will reduce the power to product, and ensure the equipment to work in the normal position. When the heat effect reaches a certain value, its resistance value will be must greater than the original, which will cause the electrical energy that passes through, decreases, thus to achieve the purpose of protection.

When reaching the upper limit temperature, V321HG34 will move from a low resistance state to a high resistance state, which also produces high impedance. So the current will be limited, the power of the device will be cut off, thus to prevent the over-temperature of the system or equipments. However, after the temperature cools down and moves to the normal range, V321HG34 will move back to the low resistance status. At this time, the current will be back to normal and the system will start to work again.