The YW Series is an industry standard range of industrial controls with many modern features, compact and lightweight 22mm panel mounting available as a push button (both illuminated and non), selector, pilot light and key switch including IP20 finger safe contact blocks terminated with either screw or our new S3 push in terminal technology. IDEC YW Series 1 x Normally Open 1 x Normally Closed contact block with Push in terminals component item to be used a part of the YW Series pushbutton switch asssembly.