What bolts in for a 16 A lighting or socket circuit
The ABB 2CCS451001R0164 is a 1-pole miniature circuit breaker, C-curve, rated 16 A at 440 V with 6 kA breaking capacity. It's the go-to for protecting lighting circuits, socket outlets, and small appliance feeds in distribution boards. Rated insulation voltage of 440 V covers standard three-phase 230/400 V systems. Overvoltage category III means it's rated for fixed-installation duty — distribution panels, sub-mains, not just final sub-circuits.
DIN rail fit and panel space
Single-pole width means it takes one module space — roughly 17.5 mm — so it packs tight in a crowded enclosure. Depth of 94.5 mm leaves room in shallow back-boxes; height of 89 mm clears most gland plates. IP20 finger-safe terminals with screw clamps. Accepts solid or stranded copper up to 25 mm². Strip length 10 mm, torque to 2.5 Nm — standard practice for panel wiremen.