Overview This 2 Position Heavy Duty Keyswitch acts as a secure, industrial-grade, and durable on/off switch for control applications, requiring a key for activation to prevent accidental or unauthorized use. The "1NO1NC" configuration means it has one Normally Open (NO) contact and one Normally Closed (NC) contact, allowing it to control two separate circuits or components simultaneously while the key is turned between its two positions, making it a versatile choice for machinery and equipment panels. Features Key mechanism provides security preventing unauthorized use 2-position maintained action ON/OFF control 1NO + 1NC Contact configuration Switch is built with rugged, industrial-grade materials to withstand harsh environments and continuous operation Specifications General Switch rating: 500V 10A Mechanical Life: ?1000,000 cycles (momentary), ?500,000 cycles (latching) Electrical Life: ?50,000 cycles Contact Resistance: ?50m? Insulation Resistance: ?100M? (500V DC) Power Frequency withstand voltage: 3,000V, RMS 50Hz, 1min Operating temperature: -25°C to 55°C (no freezing, keep the air flowing around push button) Operating requirement: 90°C rotation requires rotation in place General Tolerance: 0-18mm=±0.25, 18-80mm=±0.52 Materials Contact: Silver Alloy Head: PA/Al-Alloy/Stainless Steel Body: ABS Base: PC