Block varistors are disk shaped varistor elements that are potted in a plastic housing and feature screw terminals on top. Block varistors can be screw fixed and used as stand-alone devices. Both the housing and potting are made of flame-retardant materials.

ESD protection to IEC 61000-4-2, level 4
Bidirectional ESD protection in one component
No change in ESD protection performance at temperatures
up to 85 °C (temperature derating)
Use of parasitic capacitance for EMI suppression and
high-frequency filtering (replacement of additional MLCC)
High surge current capability
Low parasitic inductance
Low leakage current
Fast response time <0.5 ns
Lead-free nickel barrier terminations suitable for lead-free soldering
RoHS-compatible