The 5SY5163-6: B-curve means it trips between 3 and 5 times rated current — standard for protecting wiring in residential or light commercial panels where inrush isn't a concern. The 10 kA breaking capacity per EN 60898-2 covers most distribution board fault levels; the 15 kA DC rating per IEC 60947-2 is useful for DC sub-distribution or battery-backed circuits. The 18 mm width (1 modular unit) fits standard DIN-rail enclosures, and the 76 mm depth leaves room for wiring in shallow backboxes. The universal current design (AC/DC) means you can use it on either supply without swapping the breaker.
Deployment context
The sealable design allows locking the handle position for lockout/tagout procedures.
Certified to IEC/EN 60898-2 and UL1077, covering both IEC and North American installations. Halogen-free and silicon-free construction. Ambient temperature range -40 °C to 75 °C with derating above 55 °C per the humidity/temperature table. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.