NBR 617-064 BTFV 450A 051-4252 71 12 28 NBR 617-064 BTFV 300A 051-2321 157B4912 obsolete replacement 157B4735 71 12 24 051-2481 71 12 26 157B4911 obsolete replacement 157B4734 OMTW 500 / 151B3035 160N4258 EVSI-100 WB 24 V.DC CP453-2-B0-015-S EVSI-80 WBD 24 V.DC RPP06 Obsolete