The Schneider Electric A9XPH316 is an Acti9-series comb busbar — a cuttable, insulated distribution bar for feeding multiple miniature circuit breakers or residual-current devices in a 3-phase panel. It carries 3L (three-phase) conductors, laid out at 18 mm pitch across 16 modules (288 mm total width), and is rated for 100 A at 40 °C ambient. The 100 A rating at 40 °C means this busbar can feed a full 3-phase sub-distribution board up to that current before thermal derating kicks in — above 40 °C you'd need to reduce the load per the IEC 61439-2 derating curve. Insulation voltage is 500 V AC, operational voltage 415 V AC, so it's sized for standard 400 V three-phase networks. Each way accepts 1 x 3P configuration (one three-pole breaker per position), and the busbar is marked L2 L3 for phase identification. The tooth-type connector at 54 mm between ways mates with tunnel-type terminals on the breaker line side.
Mounts horizontally in the enclosure, top or bottom on tunnel-type or double terminals. The busbar is cuttable — you trim it to the exact number of modules needed, which saves space in a populated DIN-rail panel. Fire resistance tested to 960 °C for 30 seconds per IEC 60695-2-1, and pollution degree 3 per IEC 60947-7-1 — suitable for industrial environments with conductive dust or occasional condensation. The white (RAL 9003) housing is standard for Acti9 enclosures.