SIRIUS 3RV2021-4NA25 — Motor-Protective Circuit Breaker for Panel Builds
Its interrupting ratings are substantial: 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V — the 25 kA at 400 V covers most industrial distribution panels without requiring an upstream current-limiting fuse for typical fault levels. Trip Class 10 clears a locked-rotor condition within 10 seconds.
Panel Integration & Wiring
Width of 45 mm and depth of 97 mm fit a standard 35 mm DIN rail envelope; the 119 mm height leaves clearance under a 200 mm deep enclosure lid. Spring-loaded terminals accept 2×(0.5…2.5 mm²) solid or stranded, reducing wiring time versus screw-clamp terminations.
Clearance & Ambient Limits
Minimum clearance to grounded parts: 50 mm upwards and downwards, 30 mm at the side, 0 mm forwards and backwards — the zero backwards clearance means it can be mounted flush against a backplate.