Siemens 5SY4106-8CV MCB, 1P D6, 15kA Icu 230/400V

The Siemens 5SY4106-8CV is a 1-pole miniature circuit breaker with a D tripping characteristic, rated for 6 A and a short-circuit breaking capacity Icu of 15 kA at 230/400 V AC. The D curve provides a high inrush tolerance — typically used for motor, transformer, or lighting ballast circuits where the start-up surge exceeds what a B or C curve would pass without nuisance tripping. At 15 kA Icu, it safely interrupts fault currents up to that level on a 400 V three-phase supply, which covers the majority of commercial and light industrial panelboards.