What the ratings mean for fit
The Siemens 5SP3363-3 is a SENTRON main miniature circuit breaker (MCB) in the 5SP3 design series, rated 63 A at 400 V AC, 50 Hz. The E tripping characteristic is designed for selective coordination in distribution boards.
Deployment context and panel integration
Snaps onto standard 35 mm DIN rail per EN 60715. The 76.3 mm depth and 128 mm height fit standard distribution enclosures.
Environmental and mechanical endurance
Rated for ambient temperatures from -25 °C to +55 °C operating, and -40 °C to +70 °C storage. Shock resistance is 30 g for at least 3 impacts with 11 ms duration; vibration resistance is 2 g per IEC 60068-2-6 over 20 frequency cycles from 5 to 150 Hz. Overvoltage category IV means it's rated for the point where the utility supply enters the building — the highest transient stress level within the low-voltage installation. Insulation voltage is 690 V, surge voltage resistance is 6 kV.