Thermal derating — the real-world current you get
Rated 160 A at 40 °C, 45 °C, and 50 °C — no derating needed up to 50 °C ambient. At 55 °C it drops to 158 A, at 60 °C to 155 A, at 65 °C to 153 A, and at 70 °C to 150 A. That is a shallow derating curve: only 10 A lost from 40 °C to 70 °C, so the breaker holds its rating well in a warm enclosure. If your panel ambient runs 60 °C, you still get 155 A continuous — not the full 160 A, but close enough that you don't need to oversize the frame for most loads.
Built-in auxiliary and undervoltage release
This order code ships with 2 HQ auxiliary switches and an undervoltage release (UVR) factory-fitted. The UVR trips the breaker when control voltage drops below a threshold — standard for emergency-stop circuits or undervoltage protection on machine feeders. The two HQ (high-utilization) auxiliaries give you status feedback to a PLC or indication lamp without adding a separate accessory module. No communication function on this variant; it is a pure line-protection breaker with hardwired aux contacts.
Dimensions and panel fit
Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in). That 76.2 mm width is a standard 3-pole MCCB footprint — it fits the same mounting cutout as other 160 A frame SENTRON breakers. Depth of 70 mm means it clears most 200 mm deep enclosures with room for wiring gutters. No trip indicator on this variant; the aux switches provide remote status instead.