It's the kind of breaker you'd find on a DIN-rail panel feeding a motor control center or a distribution sub-panel — the XT2V platform covers 125 A frames with compact dimensions for high-density layouts.
What the key rating means for fit
The 125 A TMF trip unit is a thermal-magnetic fixed release — thermal for overload protection (inverse time), magnetic for short-circuit (instantaneous). On a 125 A frame, that typically covers motor branch circuits up to about 75–100 kW at 400 V (depending on motor FLA and coordination study). The TMF designation means the trip curve is factory-set, not adjustable; you select the amp rating to match the load, not tune it after installation.
Deployment context
For a warehouse AS/RS application, this breaker would sit in the motor control panel feeding a shuttle or crane drive — the TMF curve coordinates with downstream contactors and overload relays.