With three poles, it switches all phases in a three-phase system, and the interrupting ratings tell you where it can safely clear a fault: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Deployment context
No official successor has been announced for this order code. If you're holding a BOM that specifies it, the part remains the active build choice. For a second-source conversation, the closest peer in the 3VA family is the 3VA1110-5ED36-0AC0 — same 3-pole form factor but with different interrupting ratings and release characteristics; verify coordination before substituting.
The 20 A rating holds steady from 40 °C up to 55 °C, then derates to 19 A at 60 °C and 65 °C, and again at 70 °C. That means in a hot panel — say 60 °C internal ambient — you lose 1 A of headroom. Plan your continuous load at 19 A if the enclosure runs warm. This is a basic thermal-magnetic breaker for straightforward line protection. If your application needs remote tripping or ground-fault detection, you'll add external accessories or choose a different variant.