Three-pole construction, front-connected (F F), built to UL and CSA standards. This is the switch variant — no overcurrent protection on the line side, just isolation and switching under load.
What the TMF trip rating means for fit
The TMF 60-600 A thermal-magnetic trip unit covers a wide adjustable range. Thermal element handles overloads; magnetic element clears short circuits. The 60-600 A band means it can be dialed down to protect a smaller feeder or left at the high end for a main switch application. Three-pole construction suits three-phase power distribution in panelboards, switchboards, or as a disconnect for motor control centers.