40 harmony ? xb4 metal 22 mm push buttons key switches with key no. 455, 421e, 458a, 520e, 3131a references key switches (1) (2) screw clamp terminal connections (schneider electric anti-retightening system) shape of head type of operator type of contact positions reference weight kg number type n/o n/c complete units key switch with key no. 455 1 C 2-positio 90 stay put xb4bg21 (zb4bz101 + zb4bg2) 0.153 xb4bg41 (zb4bz101 + zb4bg4) 0.153 spring return to left xb4bg61 (zb4bz101 + zb4bg6) 0.153 2 C 3-position 45 stay put xb4bg03 (zb4bz103 + zb4bg0) 0.153 xb4bg33 (zb4bz103 + zb4bg3) 0.153 heads only key switch with key no. 455 (3) (4) 2-position 90 stay put zb4bg2 0.098 zb4bg02 0.098 zb4bg4 0.098 spring return from right to left zb4bg6 0.098 3-position 45 stay put zb4bg0 0.098 zb4bg03 0.098 zb4bg04 0.098 zb4bg3 0.098 zb4bg5 0.098 zb4bg9 0.098 zb4bg09 0.098 spring return from left to center zb4bg1 0.098 ZB4BG01 0.098 spring return to center zb4bg7 0.098 spring return from right to center zb4bg8 0.098 zb4bg05 0.098 zb4bg08 0.098 heads with black metal bezel to order, add a fgure 7 to the references selected from above. example: zb4bg2 becomes zb4bg27. (1) recommended maximum number of contacts and sequence of contacts constituting the body (mounting collar + contact) associated with the head, see page 24. (2) the symbol indicates key withdrawal position(s). (3) other key numbers: - key no. 421e: add suffx 12 to the reference. - key no. 458a: add suffx 10 to the reference. - key no. 520e: add suffx 14 to the reference. - key no. 3131a: add suffx 20 to the reference. example: for a switch head with key no. 421e, 2-position stay put, with key withdrawal from the left-hand position, the reference becomes: zb4bg212 . (4) for specifc keys with other numbers, please consult your regional sales offce. note: for contact block and mounting collar ordering information, see pages 48, 50, 51 and 52. xb4bg33 zb4bg0 introduction: page 14 specifcations: page 20 dimensions: page 72 assembly of other products using body/contact assemblies, see page 48 ; accessories, see page 62
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