The KT9 Series Motor Protection Circuit Breakers from Sprecher + Schuh provide a reliable, compact solution for protecting motors against overload, short circuit, and phase failure conditions. Designed for today’s demanding industrial environments, KT9 breakers combine the functions of a manual motor starter and a thermal-magnetic circuit breaker into one space-saving device.
These breakers are ideal for use in motor control panels, machinery, and distributed motor starter applications. With adjustable overload protection, fast magnetic trip response, and built-in phase-loss sensitivity, the KT9 series ensures both your motors and your operations are well-protected.
Whether you’re looking to protect small fractional horsepower motors or larger 32A motors, the KT9 series offers a range of frame sizes, accessories, and connection options to fit your specific application. Their rugged design, ease of installation, and global approvals make them a go-to choice for OEMs, panel builders, and maintenance teams alike.
Key Features
Thermal-Magnetic Protection – Combines adjustable thermal overload and fixed magnetic short-circuit protection in one device
Wide Current Range – Available in ratings up to 32A to suit various motor sizes
Phase Loss Sensitivity – Trips the breaker in the event of phase failure, protecting the motor from damage
Compact Design – Saves panel space and simplifies layout in control cabinets
Manual ON/OFF Operation – Allows local control of motors for quick testing or servicing
Trip Indication Window – Easily identify the cause of a fault (overload or short circuit)
Adjustable Overload Settings – Fine-tune protection to match your specific motor requirements
Short-Circuit Rating up to 100kA – High interrupting capacity when used with proper fuses or protection
Wide Range of Accessories – Optional auxiliary contacts, shunt trips, under-voltage releases, and more
Compatible with CA7 Contactors – Allows for seamless motor starter assembly with Sprecher + Schuh components
Certifications & Standards
UL Listed and CSA Certified for use in North America
CE Marked for global compliance
Meets IEC 60947-4-1 and 60947-2 standards
Whether you're building new equipment or upgrading existing installations, the KT9 Series gives you dependable motor protection in a small, versatile package. Its durable performance, flexibility, and ease of integration make it a trusted solution across a wide range of industrial applications.
