311SM1721-H4

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Snap action, limit switches are electro mechanical devices that are activated when a predetermined level is exceeded through physical contact or movement. These switches are used to measure a wide range of variations in physical levels, from vibration to pressure, tension, and torque. The 311SM1721-H4 is a product from the Micro Switch Company, a subsidiary of the Honeywell Corporation, designed to be used in applications requiring reliable and cost-effective switching solutions.

The 311SM1721-H4 snap action limit switch is a sealed, single-pole double-throw switch rated up to 15A at 120VAC and 5A at 250VAC. It features a variety of mounting options including panel, sub-panel or multiple mounting. Additionally, it has a removable actuator for flexibility and held-in-reset feature for automated function tests.

One of the major advantages of the 311SM1721-H4 switch is its cost effectiveness. It costs less than other high-end switches, while still providing reliable switching solutions. Additionally, its small size gives it a low profile, making it easier to mount in tight spaces with limited access. Furthermore, its sealed design protects it from dirt and dust, which increases its lifespan and helps protect it from interior wear and tear.

The 311SM1721-H4’s working principle involves a mechanism in which a moving contact is operated by the actuator when a certain level of physical pressure or tension is exceeded. The switch then triggers an electrical event, either by turning on or off a motor or another electrical device, or by signalling another device or process. It is rated for up to 1 million cycles and has a tolerance of up to 0.2mm for its actuator travel to ensure accuracy and reliability. It also features two normally-open contacts for use in applications requiring two-stage switching.

Due to its low-cost and small size, the 311SM1721-H4 is suitable for a wide variety of applications that require reliable and economical switching solutions. It is commonly used in industrial automation, robotics and factory automation for applications such as limit switches for measuring cycle time, safeties and interlock switches, and slide switches for controlling safety functions. It is also used in traffic lights, pumps and valves. Additionally, its sealed design makes it suitable for hazardous and extreme environments, as well as exterior applications.

The 311SM1721-H4 snap action, limit switch is a cost-effective and reliable switch solution that can be used to measure a wide range of physical levels and can be used in a variety of applications, from industrial automation and robotics to traffic lights and hazardous environments. Its reliable and accurate switching solutions, combined with its low-cost and small size, make it an ideal choice for applications requiring reliable and cost-effective switching solutions.

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