Würth
Varistor (230V AC) - Wurth 820412711
Varistor (230V AC) - Wurth 820412711
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Würth varistor 820412711 provides overvoltage protection in sensitive equipment operating up to 275V AC. Varistors are very useful for preventing damage due to high voltage events or electrostatic discharge by clamping the voltage.
Features
- Varistor works immediately after surge impulse
- Response time <25ns
- -45°C to +85°C operating temperature range
- UL1449 certified
For more information please see the datasheet.
Frequently Asked Questions
How does a varistor work?
Varistors have a variable resistance dependent on the voltage applied. The higher the voltage the lower the resistance so when there is a increase voltage surge on the line (e.g. ESD, surge or transient) the voltage diverts through the varistor rather than damaging your product electronics.
Is a varistor single use?
No
A varistor can see multiple high voltages or ESD surges and recover. However, the varistor will get damaged if there is a prolonged high voltage applied (higher than its rating).
Where do I place a varistor?
The varistor should typically be fitted between the positive and neagtive lines in a DC system and between line and neutral, line and Earth and neutral and Earth in and AC system. Varistors should be place on any lines that may be susceptible to voltage fluctuations.
Do you offer bulk pricing on this part?
Yes
The pricing on this page is for quantities up to 10 off. If you wish to purchase in larger quantities we would be happy to provide you with a quote. Please get in touch.