The Siemens 5SL6416-6RC is a SENTRON 4-pole miniature circuit breaker rated 16 A with a B tripping characteristic and a 7.5 kA breaking capacity per EN 60898. It protects branch circuits in residential and infrastructure panels against overload and short-circuit faults, and its 4-pole design switches all three phases plus the neutral — though the neutral pole is not switched internally (Product Component / Neutral Conductor Switching = No), so the neutral path is solid through the device.
The B characteristic means the magnetic trip activates at 3 to 5 times rated current — 48 to 80 A for this 16 A unit — making it the right choice for resistive or general-purpose loads where inrush is low. For motor or transformer circuits with higher inrush, a C or D curve would be needed to avoid nuisance tripping. That is adequate for most residential and light-commercial service entrances; if your fault current study shows higher prospective short-circuit current, you would step up to a 10 kA or 15 kA rated device. Rated operational voltage is 415 V AC three-phase, with a maximum of 440 V AC in multi-phase operation. Single-phase operation is rated 250 V AC. For DC circuits, the maximum rated voltage is 72 V — so this is not a general-purpose DC breaker for higher-voltage battery banks or solar strings. That is standard for a residential-grade MCB; if your application cycles the breaker frequently as a disconnect, expect to replace it sooner than a dedicated switch-disconnect.
This 4-pole MCB occupies 4 modular width units on a DIN rail — 72 mm wide, 90 mm tall, 76 mm deep, with an installation depth of 70 mm. The touch-protection feature is engaged when conductors are connected, so accidental contact with live terminals is prevented in a properly wired panel.