The Siemens 5SL6605-7 is a 4-pole (3P+N) SENTRON miniature circuit breaker with a C tripping characteristic, rated at 0.5 A and 400 V AC.
Panel fit and environment
At 4 modular-width units (72 mm wide, 90 mm tall, 76 mm deep with 70 mm installation depth), it snaps onto standard DIN rail and fits any enclosure that accepts 4-pole MCBs.
Thermal derating and environment
The 0.5 A rating holds at 30 °C ambient; at 40 °C it derates to 0.48 A, at 45 °C to 0.46 A, and at 55 °C to 0.44 A. That covers unconditioned electrical rooms and outdoor-rated enclosures in most climates.