The 5SY4515-7CV is a 2-pole miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 1.6 A at 40 °C and 15 kA breaking capacity per IEC 60947-2 — that 15 kA figure is the short-circuit capacity at 230/400 V AC, meaning it can safely interrupt a fault up to 15 kA without upstream damage in a standard distribution board. Width is 36 mm (2 modular units). Ambient temperature range is -40 °C to 75 °C, but the rated current derates above 35 °C: 1.6 A at 35 °C, 1.48 A at 40 °C, 1.42 A at 45 °C, 1.4 A at 50 °C, 1.29 A at 55 °C. Above 55 °C, humidity limits apply — max 95% RH up to 55 °C, then 55% up to 70 °C, then 35% up to 75 °C.
Rated for single-phase AC operation up to 250 V and DC operation up to 72 V maximum. Neutral conductor switching is integrated — the breaker switches both poles, which is useful for single-phase circuits where you need to isolate both line and neutral.
Installation and compliance
Touch protection integrated. Complies with IEC/EN 60947-2; suitable for mechanical engineering and industrial applications per the manufacturer's stated suitability. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — adequate for most industrial panels but not rated for continuous high-vibration environments like direct engine mounting.