That 40 A holds steady through 50 °C — only starts to derate above 55 °C, dropping to 36 A at 70 °C. So for a panel running warm near the top of a cabinet, you've got headroom before the thermal curve bites. At 240 V it's rated 52.5 kA — that's a serious short-circuit rating for a 40 A frame, typical of a high-capacity distribution board. At 415 V it's still 32 kA, at 440 V it's 13.6 kA, and at 690 V it's 7.5 kA. The drop-off with voltage is normal for an MCCB — the arc extinction gets harder as voltage rises. If your system fault current at 415 V is under 32 kA, this breaker is sized right. The TM210 overcurrent release is a thermal-magnetic type — thermal for overload protection, magnetic for short-circuit. No electronic trip unit here, so no adjustable curves or communication. It's a fixed-characteristic breaker for straightforward feeder protection where you don't need selectivity tuning. That's above the typical 690 V industrial supply, so it's comfortable in 400 V and 690 V networks without derating the insulation.
Integrated undervoltage release and auxiliary switches
The auxiliary release order code is 3VA9608-0BB11. No separate auxiliary contact block needed — these are built into the breaker. Standard for indoor panel mounting. Dimensions are 130 mm height, 76.2 mm width (roughly 3-inch wide), 70 mm depth — fits standard SENTRON mounting patterns.