The LITTELFUSE 200:5 CT/ 1 IN. WINDOW/ DONUT is a high-performance current transformer designed for accurate measurement and monitoring in electrical systems. This model features a 200:5 ratio, making it ideal for applications requiring precise current sensing. Constructed with durable materials, it ensures longevity and reliability in various environments. The donut shape allows for easy installation around existing conductors, while its 1-inch window accommodates standard wiring sizes. This transformer complies with industry standards, ensuring compatibility with a wide range of systems. Perfect for use in power distribution and industrial applications, it provides essential data for system monitoring and protection.