Siemens 3VA1150-3EF36-0AH0 is a SENTRON MCCB with TM240 release, rated 50 A at 40 °C through 50 °C, derating to 45 A at 70 °C. Interrupting capacity is 75.6 kA at 240 V, dropping to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 75.6 kA at 240 V is the headline number for North American 240/120 V split-phase or 240 V delta services; at European 400 V class, you still have 52.5 kA, which clears most industrial fault levels below large transformer secondaries. Three-pole construction, 800 V rated insulation voltage, and maximum power loss of 14.6 W. Useful for remote trip indication without stealing an auxiliary contact.
Mounting dimensions and panel fit
Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in). The storage limits are wider because the breaker is not carrying current or under mechanical stress — the -40 °C floor matters if the panel is shipped or stored in an unheated warehouse in a cold climate.