The 3-pole configuration means it simultaneously opens all three phase conductors on a fault — standard for three-phase motor branch circuits, feeder protection, or distribution panels where phase-loss protection is required. The TMF trip curve provides fixed thermal (overload) and magnetic (short-circuit) thresholds; the 15-500 A range covers a wide band of load currents, but the actual trip point is set at the factory and not field-adjustable, so the order code must match the required protection setting exactly.
The TMF trip unit is sealed — no dials or interchangeable rating plugs — so the breaker's protection setting is fixed at the 15-500 A value stamped on the label. For a panel OEM or MRO planner, this means the order code alone defines the overload protection; there is no risk of mis-adjustment during commissioning, but also no field flexibility to re-range for a different load without swapping the entire breaker.