The NA Series of transient surge suppressors are varistors (MOVs) in square disc form, intended for special industrial high-energy applications requiring unique electrical contact or packaging methods provided by the customer. The electrode finish of these devices is solderable and can also be used with pressure contacts. Discs may also be stacked. The NA Series varisor is a square 34mm device, with thicknesses ranging from 1.8mm minimum for the 130V device to 7.5mm maximum for the 750V device. For information on mounting considerations refer to Application Note AN 8820. This disc is also available with encapsulation and PCB leads.