The Schneider Electric EZC100F3020 is a 3-pole EasyPact EZC100F circuit breaker rated 20 A at 40 °C (20 A at 50 °C with the TM-D thermal-magnetic trip unit). Its 25 kA Icu at 400–415 V AC 50/60 Hz (per IEC 60947-2) gives you enough interrupting capacity for most distribution panels without stepping up to a larger frame. The 690 V rated insulation voltage (Ui) means it's comfortable in 480 V or 600 V class systems — the operational voltage maxes at 550 V AC or 250 V DC.
This breaker's F-coded breaking capacity varies by voltage: 25 kA at 110–130 V and 220–240 V AC, 10 kA at 380–415 V AC, 7.5 kA at 440 V AC, and 5 kA at 550 V AC. On DC circuits it delivers 5 kA at 125 V (1-pole) or 250 V (2-pole).
It's a Category A breaker (no intentional short-time delay), so it trips instantaneously on fault.
IP20 finger-safe terminals, IK07 impact resistance, and pollution degree 3 (IEC 60664-1) suit it for general-purpose industrial panels.