The Siemens 5SU1326-6FP06 is a 2-pole RCBO from the SENTRON line — a combined residual-current and overcurrent protective device rated at 6 A with a 30 mA residual trip threshold and a B tripping characteristic. It's a current-production part, so no lifecycle surprises on a BOM freeze.
The 6 A rating at 30 °C is the headline current. Derate to 5.7 A at 40 °C, 5.3 A at 50 °C, and 5 A at 60 °C (–) — that's the curve to check if the panel ambient runs hot. The 30 mA residual is Type A, which catches pulsating DC fault currents from single-phase rectified loads — VFDs, LED drivers, switching supplies.
Panel integration
Snaps onto DIN rail — 2 modular widths (36 mm wide,). Depth is 72 mm, installation depth 70 mm. Mounting position any, supply feed from top or bottom. IP20 with distribution board installed and conductors connected — so it's an enclosed-panel device, not a standalone outdoor unit.
Listed as current production. No end-of-life notice or successor code in the record.