The TM240 thermal-magnetic overcurrent release handles both overload and short-circuit protection without an external relay — a common choice where adjustable electronic trip is not required. Interrupting capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. These figures govern SCCR coordination downstream: at 415 V, for example, the breaker clears a 52.5 kA fault without upstream reinforcement, which simplifies panel design in 400 V distribution. The auxiliary release order code is 3VA9688-0BL33. No auxiliary contacts, undervoltage release, or communication function are fitted, so add-on blocks are needed if those features are required.
The breaker holds its 40 A rating through 50 °C ambient (–). Above that, current must be derated: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C (–). The 76.2 mm width is a standard 3-pole MCCB footprint — it occupies three 25.4 mm (1-inch) module positions on a DIN rail or panel-mount base.