The Siemens 5SL4310-8 is a SENTRON-series miniature circuit breaker — 3-pole, D-curve, rated 10 A at 400 V AC with a 10 kA breaking capacity certified to both EN 60898 and IEC 60947-2. The D characteristic means it tolerates inrush currents up to 10–20× the rated current before tripping, which makes it the right choice for motor starters, transformers, and other inductive loads that draw a heavy start-up surge.
The 10 kA rating under both EN 60898 (household standard) and IEC 60947-2 (industrial standard) means this breaker can safely interrupt fault currents up to 10 000 A at 400 V without welding its contacts or cascading the fault upstream. That dual certification covers residential infrastructure and light commercial panels. Maximum operating voltage sits at 440 V AC for multi-phase operation, giving a bit of headroom above the nominal 400 V.
Physical integration and environment
Dimensions: 90 mm high, 54 mm wide (3 MW), 76 mm deep, with a 70 mm installation depth into the panel. Sealable with a lead or tag for tamper-proof metering or safety isolation. Supplementary devices (shunt trips, auxiliary contacts, alarm switches) can be snapped onto the right side without extra wiring space.