Panel fit and mounting
The 5SY7114-7: Width is one modular unit (18 mm) — snaps onto DIN rail via the quick-assembly system, any mounting position. Depth 76 mm, installation depth 70 mm. IP20 with conductors connected, pollution degree 3, overvoltage category III. Sealable for tamper-proofing. The combined terminal (top and bottom) accepts the same conductor range; neutral is not switched.
Temperature derating — the real-world rating
At 35 °C ambient the breaker holds its full 0.3 A rating. At 40 °C it derates to 0.28 A, at 45 °C to 0.27 A, at 50 °C to 0.26 A, at 55 °C to 0.25 A, and at 60 °C to 0.24 A. If your panel runs warm — say 50 °C inside the enclosure — the continuous load should not exceed 0.26 A on this branch. Humidity influence: max 95% up to 55 °C, tapering to 35% at 75 °C.
