Surge protection in accordance with EN-61000-4-5 ESD protection in accordance with EN-61000-4-2 Burst protection in accordance with EN-61000-4-4. SMD Power Varistors WE-VS Series. After a surge impulse the varistors works immediately in normal mode so there is no slip current Excellent absorption Operating temperature: -40 °C +85 °C for the sizes 0402 to 0805,-40 °C +125 °C for the sizes 1206 to 2220 Nickel barrier for lead-free soldering