Series:	C-III
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Maximum AC Volts:	250V
Varistor Voltage (Min):	351V
Varistor Voltage (Typ):	390V
Varistor Voltage (Max):	429V
Current - Surge:	10kA
Energy:	300J
Number of Circuits:	1
Capacitance @ Frequency:	7000pF @ 1MHz
Operating Temperature:	-55°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	Disc 20mm

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TVS - Varistors, MOVs

The V250LA40C is a voltage surge protection device of some special and important importance. It is usually used in power line protection and power system protection applications. The application field not only includes a wide range of applications such as home appliance circuit protection, power system protection, elevator system protection, power electronic equipment protection, industrial power supply protection, etc., but also plays an important role in the protection of circuit safety and the prevention of lightning and static electricity.The V250LA40C consists of a two-terminal package composed of a Zinc Oxide resistor element and a glued plastic cover.It has rugged construction and good thermal shock capacity. It has a fast response time and good flame retardant performance.The Zinc Oxide resistor is a kind of non-linear voltage-current characteristics. It has high breakdown voltage and quick response speed.When the current through the protected circuit exceeds a predetermined value, the V250LA40C can quickly absorb the transient surge current and limit the overvoltage; thus, it reduces the impact of the surge current on the protected circuit and prevents the circuit from being damaged.In operation, the V250LA40C works in a negative temperature coefficient. As the temperature increases, the varistor impedance gradually decreases until it reaches its maximum rated current. At the same time, with the increase of temperature, the breakdown voltage of the varistor gradually decreases until it reaches its minimum specified value. When the current reaches its maximum rated value, the varistor can only absorb additional current, and the decrease of its impedance is smaller than before.When the external transient over-voltage electrolytes on the V250LA40C, it will clamp the over-voltage by increasing its impedance and reduce the peak value of the transient over-voltage.At the same time, due to the rapid increase in impedance, the surge current is clamping quickly, and the heat generated by the surge current is dissipated by the transfer of heat.At the same time, the Zinc Oxide resistor element of the V250LA40C has a great advantage in withstand voltage, and can absorb more than 7000A peak current in a few milliseconds.In conclusion, the V250LA40C has a strong overvoltage operation and is suitable for a wide range of applications. It is suitable for surge current protection in power system protection and home appliance circuit protection, and also plays an important role in the protection of circuit safety and the prevention of lightning and static electricity. The lightning performance and heat resistance of the V250LA40C are particularly advantageous, so it can meet the special requirements of different applications.：（www.mwxxkj.com），。

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