Patent ID: 8378767

Claim:
A combination comprising an electromagnetic contact device and one or more different ancillary units, wherein the electromagnetic contact device comprises: a body case having a case-side mounting portion to which the one or more different ancillary units are mounted, and an indicator window provided on a side on which the ancillary unit is mounted, a movable contact point support, an electromagnet having a coil, said coil, when being excited, moving the movable contact point support, and an operation indicator piece formed integrally with the movable contact point support and exposed to an outside from the indicator window, wherein the ancillary unit comprises: a surge absorption unit absorbing surge voltages generated by the electromagnet and having a unit-side mounting portion, or an auxiliary contact point unit, the surge absorption unit or the auxiliary contact point unit being detachably mounted on the case-side mounting portion of the electromagnetic contact device, and wherein the auxiliary contact point unit includes a case, an indicator window formed in the case, an auxiliary circuit terminal, and an auxiliary contact point unit operation indicator piece exposed to an outside from the indicator window, said auxiliary contact point unit being arranged in the case linkable with the operation indicator piece of the electromagnetic contact device.