The Schneider Electric A9C15506 is an Acti9 TL impulse relay — a 1-pole, 16 A rated device for switching lighting and resistive loads on 230 V AC 50 Hz networks. It's a latching relay: a 50 ms impulse on the control circuit toggles the NO contact, and it holds that state without coil power draw. The 19 VA hold-in consumption is only during the impulse, not continuous. Rated for AC-22 duty at 200,000 cycles, this covers mixed resistive and inductive loads up to 16 A — typical for contactor-driven lighting banks, fan coils, and general building automation switching. The 5 operations/minute switching frequency matches the pulse-repeat rate of push-button or PLC impulse control.
Snaps onto standard DIN rail, occupying 18 mm width (one modular pitch). The 84 mm height and 60 mm depth fit flush in a distribution board or enclosure alongside Acti9 MCBs and RCCBs. IP20 on the opening, IP40 inside the enclosure — so it's panel-protected, not for wet locations. Terminals are tunnel type: power circuit accepts 1 or 2 cables up to 4 mm² rigid or 2.5 mm² flexible (with or without ferrule). Control circuit takes 1 cable up to 1.5 mm². Strip length is 9 mm; tighten to 1 N·m. The NO contact composition means one switched pole per unit — if you need multiple poles, stack units with a common control impulse.
Certified to IEC 60669-2-2 and IEC 60669-1 (remote-control switching devices and general requirements). Pollution degree 3 suits industrial environments with conductive pollution. Tropicalisation class 2 means the relay is treated for humidity up to 95% at 55 °C — relevant for warm, damp panel installations. NF quality label indicates compliance with French standard NF C 61-314, often required for French-market building electrical installations.