The Siemens 5SU1326-7FP32 is a 2-pole RCBO from the SENTRON series, combining overcurrent protection and residual current detection in a single 36 mm-wide module (2 modular width units). Breaking capacity is 6 kA per EN 60898 and 7.5 kA per IEC 60947-2, giving headroom for most commercial and light industrial distribution boards.
Current derating and temperature range
Above that, the unit derates linearly: 30.8 A at 40 °C, 30.2 A at 45 °C, 29.5 A at 50 °C, 29.2 A at 55 °C, and 28.8 A at 60 °C. If the distribution board runs warm — say, a packed enclosure near a heat source — factor the 40 °C or 50 °C column into the load calculation.
Snap-on mounting to DIN rail, any position. Supply can enter from top or bottom — no orientation constraint. Touch protection is built in (finger-safe terminals with connected conductors). IP20 rated, meaning it is protected against solid objects over 12 mm but not against moisture — keep it inside a closed panel or enclosure.