Type A RCCB for 80A circuits, 30mA protection
The Siemens 5SM1317-6BA is a Type A residual current circuit breaker (FI protector) rated 80A, 2-pole, with a 30mA rated residual operating current for 230V systems. The 2.5TE width (about 45mm on a DIN rail) fits standard distribution boards. Type A detection covers sinusoidal AC and pulsating DC residual currents — the common profile for single-phase rectified loads like switched-mode power supplies, LED drivers, and small VFDs feeding the line.
Panel integration and DIN-rail fit
The 2.5TE width (2.5 x 18mm = 45mm module width) snaps onto a standard 35mm DIN rail. Two-pole construction — line and neutral — with the residual current sensing built into the same housing. No external neutral bar needed for the protected circuit. The 55mm depth (D=55mm per the description) clears most shallow enclosures; verify gland plate clearance if back-panel wiring is tight.