Switch disconnector, 125 A, no overload or short-circuit protection
It is built without overload or short-circuit protection — it is a disconnect, not a breaker. The clamp connection terminals accept standard copper conductors for panel wiring. The undervoltage release drops the switch open when control voltage falls below its dropout threshold, which is useful for safety interlocks or emergency-stop circuits that need to guarantee isolation on power loss.
The 125 A continuous rating on the IEC frame 160 means this switch handles full-load current for motor circuits or distribution feeders up to that ampacity. Because it provides no overload or short-circuit protection, it must be paired with upstream overcurrent devices — typically a molded-case circuit breaker or fuses sized to protect the downstream conductors and load. The undervoltage release coil is rated 208-230 V AC 50/60 Hz. If your control transformer or UPS supplies a different voltage, the release will not hold in — verify the coil rating against your control circuit before specifying. The changeover (SPDT) contact gives both normally-open and normally-closed signals from a single device, which simplifies wiring when you need both a run status and a fault signal.
Panel integration
The 3-pole footprint occupies a standard width on the DIN rail; leave clearance for the undervoltage release coil wiring and auxiliary contact terminals.