System protection MCCB for high-fault panels
Its interrupting capacity hits 85 kA at 120 V, 35 kA at 277 V, and 18 kA at 347 V — numbers that tell you this breaker clears faults in high-available-current panels without cascading upstream. The TM210 thermal-magnetic release is fixed at 30 A (Ir) and 300 A (Ii), so there's no adjustment dial to mis-set during commissioning.
The 85 kA at 120 V is the headline number — that's the SCCR you need for a panel fed from a transformer with high fault current. At 277 V (common in lighting panels) it still holds 35 kA, and at 347 V (Canadian 3-phase) it's 18 kA. The 1-pole format fits a 25.4 mm (1 in) width on the DIN rail, and the IP40 front means it's fine inside a clean panel but not for washdown zones.
Width is 25.4 mm (1 in) per pole, so a 1-pole breaker takes one module position on the DIN rail.