Surface Mount Multilayer Varistors (ML Series)

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The ML Series family of transient voltage surge suppression devices is based on the Littelfuse Multilayer fabrication technology. These components are designed to suppress a variety of transient events, including those specified in IEC 61000-4-2 or other standards used for Electromagnetic Compliance (EMC). The ML Series is typically applied to protect integrated circuits and other components at the circuit board level.

The ML Series is manufactured from semiconducting ceramics, and is supplied in a leadless, surface mount package. The ML Series is compatible with modern reflow and wave soldering procedures. It can operate over a wider temperature range than Zener diodes, and has a much smaller footprint than plastic-housed components.

Littelfuse Inc. manufactures other multilayer series products. See the MLE Series data sheet for ESD applications, MHS Series data sheet for high-speed ESD applications, the MLN Series for multiline protection and the AUML Series for automotive applications.


• AEC - Q200 compliant
• RoHS compliant
• Leadless 0402, 0603, 0805, 1206 and 1210 chip sizes
• Multilayer ceramic construction technology
• -55ºC to +125ºC operating temp. range
• Operating voltage range VM(DC) = 5.5V to 120V
• Rated for energy current (8 x 20μs)
• Inherent bi-directional clamping
• No plastic or epoxy packaging assures better than UL94V-0 flammability rating
• Standard low capacitance types available


• Power supply
• Power control applications
• Signal line applications