The Schneider Electric TeSys Deca LP1D40004MD is a 4-pole contactor rated for 60 A in AC-1 resistive duty at 440 V, with a 220 V DC coil. The utilisation categories listed — AC-1, AC-3, AC-3e, AC-4 — tell you which loads it can switch: AC-1 covers resistive loads like heaters, AC-3 covers squirrel-cage motors starting and stopping under load, and AC-4 covers plugging and inching duty where the contactor makes and breaks stalled-rotor current.
Mounts on a rail or plate — the mounting support is listed as rail/plate, so it clips onto standard DIN rail or bolts to a backplate in a panel. Dimensions are 85 mm wide, 127 mm high, 182 mm deep. The IP2X finger protection means the live parts behind the contactor arc shield are safe from accidental contact with a finger (IEC 60529 and VDE 0106). That's standard for enclosed panels; if the contactor sits exposed in a machine compartment, IP2X is the minimum for operator safety.
Environmental limits and protective treatment
Rated for operation from -40 °C to 60 °C, with derating allowed up to 70 °C. Storage range extends from -60 °C to 80 °C.
Switching timing for safety circuits
That's a deliberate gap to prevent a momentary short-circuit when switching between normally-closed and normally-open auxiliary contacts — important in safety interlock circuits where you need guaranteed break-before-make behaviour.