The Siemens 3VA1140-5ED26-0AA0 is a 2-pole SENTRON molded case circuit breaker rated for 40 A continuous at 40 °C, with a TM210 thermal-magnetic release providing LI protection (long-time and instantaneous). The short-circuit release (Ii) is fixed at 400 A, which is 10× the continuous rating — a standard instantaneous pickup for motor or feeder protection where nuisance tripping on inrush must be avoided.
Mounting dimensions and panel integration
The breaker measures 130 mm high, 50.8 mm wide (2 inches — standard 2-pole MCCB footprint), and 70 mm deep. The 50.8 mm width means it occupies two 25.4 mm pole spaces in a panelboard or switchboard.
At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. For a panel running warm — say 55 °C inside the enclosure — the continuous load should not exceed 39 A per pole.
DC rating and application notes
The maximum rated operational voltage for DC applications is 250 V. The overcurrent release is the TM210 thermal-magnetic type with LI protection — thermal for overload, magnetic for short circuit. The breaker does not include ground-fault monitoring, communication functions, or a motor drive option. For DC switching power values, Siemens directs to the 3VA molded case circuit breaker device manual for specific derating curves.