The Siemens SENTRON 5SL4204-7RC is a 2-pole miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 4 A and breaking 10 kA per EN 60898 at 415 V AC. It occupies a single modular width (18 mm) on the DIN rail, making it a compact choice for residential or light commercial sub-distribution boards where branch circuit protection is needed on a 2-pole feed.
The 4 A rating limits continuous load to about 920 VA on a 230 V single-phase leg or 1.66 kVA across both poles at 415 V. Rated for multi-phase operation up to 440 V AC and single-phase up to 250 V AC, the breaker covers both split-phase and line-to-line configurations. The 50/60 Hz frequency range is standard for global mains supplies.
Snap-on DIN rail mount, any position. Depth is 76 mm, width 18 mm — one modular unit. The 70 mm installation depth accounts for the DIN rail clip and wiring space behind the panel. Sealable for tamper-proofing in metered or rental installations. Supplementary devices can be added — auxiliary switches, shunt trips, or alarm contacts — via the accessory slot on the right side.