Cam switches Characteristics (p. 213) > CHANGE-OVER SWITCH WITHOUT "OFF" POSITION (continued) PR 12 - 16 A (AC21) Cat. No. Enclosure Designation Black small handle 64 aluminium plate 1P - 2 contacts 2P - 4 contacts 3P - 6 contacts 4P - 8 contacts NC51DXQ 1 2 PR12 2251 D4 BCQ3 PR12 2252 D4 BCQ3 PR12 2253 D4 BCQ3 PR12 2254 D4 BCQ3 NC51DXQ NC52DXQ NC53DXQ NC54DXQ Dimensions in mm *P: 77 (1 to 6 contacts) 101 (7 to 8 contacts) 22 120 x 96 Ø28 26 P PR 17 - 20 A (AC21) 2-screw panel mount - interval: 30 mm Grey/black small handle 48 aluminium plate and frame 1P - 2 contacts 2P - 4 contacts 3P - 6 contacts 4P - 8 contacts SC52DQ1 22 48 x 50 Ø28 P Dimensions in mm *P: 33 (1-2 contacts) 45 (3-4 contacts) 57 (5-6 contacts) 69 (7-8 contacts) 32 *P = Depth 158 1 2 Cat. No. Designation PR17 2251 D4 E Q48PN PR17 2252 D4 E Q48PN PR17 2253 D4 E Q48PN PR17 2254 D4 E Q48PN SC51DQ1 SC52DQ1 SC53DQ1 SC54DQ1