The Siemens 5SY3114-7 is a 1-pole SENTRON miniature circuit breaker with a C-curve tripping characteristic and a rated current of 0.3 A at 400 V AC. At 0.3 A, this is a low-current branch protection, not a main feeder breaker. Breaking capacity is rated at 4.5 kA per EN 60898 and 6 kA per IEC 60947-2, with a DC rating of 15 kA at 72 V per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No. 235. The UL/CSA rating (5 kA) confirms it is accepted for North American supplemental protection applications. It mounts in any position, snaps onto the standard quick-assembly rail, and accepts top and bottom combined terminals.
Integration and compliance notes
Rated for 50/60 Hz operation, overvoltage category III, and energy limiting class 3. The ambient temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C (max 95% RH at 55 °C, tapering to 35% at 75 °C). This covers most indoor industrial and outdoor cabinet installations.