The Altech Corporation S1 is a SPST-NO contact block designed for 10A @ 600VAC applications. It features screw terminal termination and is part of the 22mm series.
The Schneider Electric ZB2BE101 is a Harmony add-on contact block with one Normally Open (NO) contact. It features screw clamp terminals and is designed for 22mm pushbutton switches.
The Siemens 3SU14001AA101BA0 is a contact module featuring one normally open (NO) contact and screw terminals. It is designed for front plate mounting.
