Multilayer varistors

Vishay Intertechnology has released a new range of multilayer varistors that are suitable for protecting sensitive components from incoming overvoltage transients.

Vishay Intertechnology has released a new range of multilayer varistors that combine typical 0.5 nsec response time with capacitance values down to 70 pF (25 pF optional) in accordance with CECC 42000 and IEC 61051-1.

Devices in the new MLV 2322 573 (0603 case size) and 2322 574 (0805 case size) series are suitable for protecting sensitive components from incoming overvoltage transients. Additionally, they can also be used to suppress electrostatic discharges reaching 15 kV in air and 8 kV in contact (IEC 61000-4-2).

Features of the MLV series also include inherent bi-directional clamping, a high energy/volume ratio, and nickel/tin terminations. They are lead (Pb)-free according to the upcoming European legislation and withstand a three-fold lead-free reflow soldering process.

They offer a number of advantages over traditional circuit protection devices including insensitivity to reverse polarity, reduced footprint, and reduced component count. Customer-specific versions are available upon request.

All the varistors are fully glass-coated, giving greater environmental, climatic, and resistance-to-soldering-heat (RSH) protection.

Maximum average power dissipation is rated at 5 mW, while working voltages range from 4 V to 25 V, depending on the device chosen. Maximum allowed pulse current is 30A standard, with higher values optional.

The devices are supplied in paper tape-and-reel format and are suitable for wave and reflow soldering in accordance with CECC00802 and IEC 68-2-20.

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