It serves as a manual disconnect and isolation point in power distribution panels, motor control centers, and industrial machinery — the three poles switch all phases simultaneously, providing visible isolation for safe maintenance access.
Its 3-pole configuration suits three-phase loads up to 125 A — typical for branch-circuit isolation on motor feeders, pump panels, and conveyor disconnects. The TMF trip unit provides thermal overload and magnetic short-circuit protection, so the switch-disconnector doubles as a manual disconnect with integral overcurrent protection in a single package.