The Siemens SENTRON 5SY3008-7WM is a 1P+N miniature circuit breaker rated 8 A at 230 V AC, with a C-curve tripping characteristic and a breaking capacity of 4.5 kA per EN 60898. It occupies a single 18 mm width unit on standard DIN rail, mounting in any position. The neutral pole is switched, making it suited for single-phase final subcircuits where both phase and neutral need overcurrent protection.
The 8 A rated current at 230 V AC defines the continuous load this MCB can carry without tripping under normal conditions. The 1P+N configuration switches both the line and neutral conductors, with overcurrent protection on the phase only. The neutral pole is switched but not protected — a common arrangement for single-phase distribution boards where the neutral bar is shared downstream.
The 18 mm width occupies one width unit, and the 76 mm depth plus 70 mm installation depth fits standard distribution enclosures. The screw terminals accept the tightening torque range of 17.7 to 22.1 lbf·in.