The LR9D32KITD18BD is a TeSys D thermal overload relay from Schneider Electric, designed for direct on-line motor starting. It protects a 3-phase motor by monitoring current and tripping on overload, with a motor power range of 7-11 kW at 380-440 V three-phase. It offers adjustable trip classes from Class 5 to Class 30, letting you match the relay's thermal curve to your motor's starting characteristics — a Class 10 setting for standard-start motors, Class 20 for high-inertia loads like fans or conveyors. The relay resets automatically after a trip, with a reset time adjustable between 1.5 and 4 minutes. A red push-button provides manual stop and reset override when you need to lock out the restart.
Dielectric strength tested at 6 kV at 50 Hz per IEC 60255-5, confirming the insulation system can handle transient overvoltages common on industrial lines. Front face IP20 protection keeps fingers out, but the relay itself is designed to mount under a contactor or on a rail with accessories — it's not a standalone enclosure-rated device.
Listed to UL 60947-4-1, IEC 60947-4-1, CSA C22.2, and GB 14048.4 — covers North American and international installations without a second part number. Flame retardance rated V1 per UL 94, and glow-wire tested to 850 °C per IEC 60695-2-1, meeting fire safety requirements for panel components. Protective treatment TH per IEC 60068-2-30 means it's tested for damp heat, cyclic — relevant if the panel sees humidity swings.
Tighten power terminals to 3.1 N·m, control terminals to 0.8 N·m. Associated fuse rating for the signalling circuit is 5 A gG or BS type — keep that in mind when sizing the control transformer secondary. Coil consumption is 300 mW at 24 V DC, negligible for the PLC output driving it.