The 160 A rating holds flat from 40 °C through 50 °C — no derating needed in a typical 40 °C panel — then drops to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. That thermal curve means a panel builder can size the breaker for a 160 A bus without headroom at 50 °C; above that, the load must be trimmed or the breaker upsized. Breaking capacity is specified at four voltage levels: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V.
Three-pole construction, 76.2 mm wide (roughly 3 inches), 130 mm tall, 70 mm deep. The width matches the standard 3-module DIN-rail footprint for an MCCB this size, so it drops into a panel cutout designed for a 160 A frame without re-drilling.