The Siemens 5SY7402-8CC is a SENTRON miniature circuit breaker (MCB) with a D tripping characteristic, 4 poles, and a rated current of 2 A at 440 V AC.
Mounts in any position, with an installation depth of 70 mm and overall depth of 76 mm — fits standard 80 mm deep enclosures without the gland plate interfering.
At 2 A, this is sized for a small motor or control transformer branch circuit. Temperature derating is published: at 40 °C it carries 1.89 A, at 50 °C it carries 1.77 A — so if the panel ambient runs hot, factor that into the load calculation.