It carries a continuous current rating of 20 A and a CLASS 10 trip characteristic, meaning it will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors during locked-rotor conditions. The breaker also includes phase failure detection, so a lost phase on the line side will trip the load before single-phasing damages the winding. Breaking capacity varies with supply voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. At 400 V, that 50 kA SCCR covers most industrial distribution panels without requiring an upstream current-limiting fuse. The 3RV1021-4BA10-ZX95 is rated for 7.5 kW motor power at 400 V AC, which sizes it for a typical 10 HP (7.5 kW) four-pole induction motor on a 400 V three-phase supply. Maximum operating frequency is 15 operations per hour under AC-3 duty, adequate for pump, fan, and conveyor cycling but not for high-speed jogging applications.
Width is 45 mm, height 97 mm, depth 96 mm. No side or backward spacing required — zero millimeters to adjacent devices — so it packs tight on the rail. Main and auxiliary/control circuits both use screw-type terminals. Solid and stranded conductors: 2× (1 … 2.5 mm²) and 2× (2.5 … 6 mm²) per terminal. AWG equivalents: 2× (14 … 10). Finely stranded with core-end processing uses the same ranges. An auxiliary switch can be added via the product extension (Yes). Ground fault detection is not built in — that's handled separately if required by the application. Shock resistance is 25g / 11 ms, suitable for machine-mounted installations near vibrating equipment.
Substance prohibitance date is 01.05.2012, which aligns with RoHS compliance deadlines.
Power dissipation and thermal management
Total power dissipation in hot operating state is 10.5 W, with 3.5 W per pole.