It carries an undervoltage release (UVR) for 208-230 V AC 50/60 Hz, plus two HQ auxiliary switches. This is not a circuit breaker — no overload or short-circuit protection is built in. It is a disconnect-only device for isolation and switching under load, meeting the requirements of a switch disconnector per its designation.
Rated continuous current Iu is 125 A — this is the current the disconnector carries continuously without exceeding temperature limits. The 160 A frame means the internal contacts and busbars are sized for that larger frame; the 125 A rating is a factory-set limit. Short-time withstand: the disconnector is rated for 2 kA at both 1 s and 0.5 s limited duration. That is not a breaking capacity — it is the fault current the device can carry closed without damage during the upstream protective device's clearing time. For a switch disconnector, this figure governs coordination with the upstream breaker or fuse.
Physical integration and environment
The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for the 160 A frame — it fits the same panel cutouts and busbar risers as other SENTRON 3VA1 devices. No lug terminals — plan for busbar or fork-type connectors. The enclosure or panel must provide the environmental seal. Maximum power loss is 38 W — account for this heat in enclosed panel thermal calculations.