The Schneider LR3D1516 is a TeSys LRD non-differential thermal overload relay for motor protection, with a thermal protection adjustment range of 9...13 A and a Class 20 tripping curve per IEC 60947-4-1.
The 9...13 A adjustment range sets the motor full-load current window — set the dial to match the motor nameplate FLA. Class 20 means the relay allows up to 20 seconds to trip under a 600% overload, standard for general-purpose induction motors starting moderate inertia loads like pumps and fans. The 1 NO + 1 NC auxiliary contact composition gives a normally-open run signal and a normally-closed trip signal; the signalling circuit is rated 1.5 A at 240 V AC-15 and 0.1 A at 250 V DC-13, so keep the DC load light. It carries approvals to EN/IEC 60947-4-1, UL 60947-4-1, and CSA C22.2 No 60947-4-1 — the key standards for motor protection in industrial panels. The IP20 enclosure means it is finger-safe but not washdown-rated; keep it inside a panel.