The Siemens 5SM1342-6BA is a 4-pole FI protector (RCCB) of Type A, rated 25 A at 400 V with a 30 mA residual operating current. The 30 mA trip threshold is the touch-protection level for personal safety per IEC 60364.
The unit occupies 4 module-widths (4TE) on a DIN rail. The D=55 mm depth keeps it within standard enclosure gland-plate clearance. For a panel OEM wireman: plan for 4TE per pole plus neutral busbar routing — the 4-pole block handles L1/L2/L3/N in one housing, saving rail space over separate single-pole RCCBs.
