Arc-fault + overcurrent in one 18 mm slot
The Siemens SENTRON 5SV6016-6KP16 is an AFDD-MCB combination unit — a single 1-module-wide (18 mm) DIN-rail device that packs both arc-fault detection (AFDD per IEC 62606) and a B-curve miniature circuit breaker (16 A, 6 kA breaking capacity to EN 60898-1 and IEC 60947-2). That means one part handles series/parallel arc-fault protection and overcurrent/short-circuit in a single 230 V AC, 1P+N circuit. No separate AFDD module eating a second slot.
Depth is 68.5 mm, installation depth 70 mm — fits flush in a standard 2-row residential DB without a protruding cover. Supplementary devices (shunt trip, auxiliary contacts, alarm switch) can be added on the right side without increasing the pole count.
