21EN51-6B

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Part Status:	Active

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The 21EN51-6B is an industrial grade snap action limit switch from Allen-Bradley, a Rockwell Automation company. Its application field speaks to its capability and reliability, within an expansive range of commercial and industrial applications. The switch has been designed for use in highly automated applications requiring fast and accurate switch action. It offers several performance characteristics, such as high operating temperature, high current ratings and robust construction. The working principle behind the 21EN51-6B is based on advanced snap action contacts that maintain contact integrity even in extreme temperatures and wide variations in current.The 21EN51-6B is a rugged, dependable switch following proven snap action technology. Its mechanical design features a nipple-closure system which helps to ensure an electrically secure connection. This system allows for secure position holding and a smooth and crisp switch action. The contacts on the 21EN51-6B are constructed using spring-loaded actuators that provide increased contact pressure and accuracy. These actuators produce a fast and reliable switching action.The high electrical ratings of the 21EN51-6B provide reliable operation in both AC and DC systems. The switch offers a high level of current switching capacity, up to 10 Amps at 125 VAC and 6 Amps at 250 VAC. Its durable design features 250 cycle mechanical life and brinellized steel lever arms which provides a long life span in challenging environments. The switch also has a high dielectric strength of 1000 VAC and a vibration of 0.5 IPS (12.7 mm/s-2).The 21EN51-6B is suitable for use in challenging environments such as hazardous locations, high ambient temperature and vibration applications. The switch includes dust-tight sealing to prevent contamination of sensitive electronic components, and its corrosion-resistant material construction is suitable for use in humid and corrosive environments. The 21EN51-6B also offers a variety of mechanical designs with multiple actuator and body configurations for various applications.The 21EN51-6B is a reliable and versatile switch solution for highly automated applications and is certified for C-UL-US, UL and CSA listed. It has become a popular solution for many industrial and commercial applications, thanks to its convenient and intuitive design, solid construction and dependable performance. With its combination of reliable snap action technology and a high current capacity, the 21EN51-6B is the ideal switch for almost any application.

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