The 1+N-pole configuration switches both the phase and neutral, with overcurrent protection on the phase only; the neutral pole is a switching pole without overload protection, common in single-phase final subcircuits where disconnection of both conductors is required.
RoHS compliance is confirmed since June 2013, and REACH candidate-list information is available from the manufacturer. No UL or CSA listing appears in the record; verify local code acceptance for your jurisdiction.
The 1 A rating and D-curve make this a niche selection: it protects a very low-current circuit against short-circuit and overload, while tolerating the high inrush of a small motor or transformer. A standard C-curve 1 A breaker would nuisance-trip on the same load.
Integration notes
Mounts on standard DIN rail. The 1+N width occupies two modular spaces. The D-curve magnetic trip operates at 10–20 times In (10–20 A), so coordination with upstream devices should account for this higher let-through energy during a fault.