?2011 littelfuse, inc. gas discharge tube (gdt) products 63 revised: september 26, 2011 speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. customer should verify actual device performance in their speci?c applications. sg series sg series description littelfuse sg series gdt offers high surge ratings in a miniature package. its designed for surface mounting on pcb with small size 4.5x3.2x2.7mm. low insertion loss is perfectly suited to broadband equipment applications. the capacitance does not vary with voltage, and will not cause operational problems with adsl2+, where capacitance variation across tip and ring is undesirable. these devices are extremely robust and are able to divert a 1000a pulse without destruction. features t 3 p ) 4 d p n q m j b o u b o e lead-free t ( ) [ x p s l j o h g s f r v f o d z t & |