TE Connectivity 1SNA173220R0500 Terminal Block Brand: ENTRELEC. Part Number: 1SNA173220R0500. Additional Description: TEC -1SNA173220R0500 PR30 Prepunched symmetrical mounting rail 17322005 DIN RAIL,35MM,PUNC,2 MTR,BK 20 017322005. Catalog Description: - Pre-punched symmetrical mounting rail, - The slotted holes ease the mounting and allow to use existing and/or numerous fixings, - Particularly well designed for fixing onto back-plates and for terminal assemblies of small dimensions...