The HA1S-3Y is an oversized round 3-position maintained selector switch from IDEC's L6 Series of miniature switches and pilot devices. This switch features a 45° 3-position maintained operation with dual-pole dual-throw (DPDT) contact configuration, available in both solder tab and PCB terminal styles. The switch is designed for 16 mm (5/8") mounting holes and incorporates locking lever removable contact blocks with positive action snap-action contacts. It is available with either gold or silver contact finishes and supports both solder tab (HA1S-3C6) and PCB (HA1S-3CV) terminal options. The device conforms to international standards including EN60947-1, EN60947-5-1, VDE0660-200, UL508, and CSA C22-2 N0.14, with worldwide approvals including UL recognition and CSA certification. Common applications include industrial control panels, machinery automation, and process control systems where reliable multi-position switching is required.