The Square D LC1D18BLS177 is an IEC-rated contactor rated for 600VAC and 18A, built for switching motor and resistive loads in control panels up to that current.
The 18A rating is the continuous thermal current (Ith) for IEC utilization categories; in AC-3 motor duty (starting and disconnecting squirrel-cage motors) it typically derates to around 9–10A, so size it for the motor FLA, not the 18A headline. The 600VAC max matches common 480V and 600V plant voltages without needing a voltage derating. The contactor carries the standard IEC block footprint — auxiliary contact blocks and coil suppressors from the TeSys D family snap on without extra brackets.
Regulatory and compliance notes
Listed under the IEC Contactors category. The manufacturer's compliance documentation covers RoHS and REACH; the part also carries a California Proposition 65 warning for antimony oxide and antimony trioxide — standard for electrical components containing certain flame-retardant or ceramic materials.