The Siemens 5SU1354-7RC40 is a SENTRON RCBO (residual current circuit breaker with overcurrent protection) rated 40 A at 50 Hz AC, combining a C-curve MCB and a Type A RCD in a single 2-module (36 mm wide) package.
The higher IEC figure applies when the RCBO is used as a circuit breaker in industrial distribution — the EN value governs residential or commercial final circuits.
Depth is 70 mm, height 90 mm. Mounting position is unrestricted — can be installed horizontally or vertically. Supply can enter from either top or bottom. The IP20 rating applies with the distribution board closed and conductors connected; the enclosure provides the environmental seal, not the device itself.
Environmental range
That covers unheated enclosures in cold climates and high-temp machine cabinets near ovens or drives.
Listed as current production (active lifecycle stage). The 5SU1354-7RC40 is a standard catalog item in the SENTRON range.