The Schneider Electric LC1F3304F7 is a TeSys F series 4-pole contactor rated for 400 A in AC-1 utilisation category (resistive load), with a 110 V AC 40-400 Hz control coil. This is a heavy-duty open-style contactor built for panel-mount applications where switching resistive heating elements, lighting banks, or non-inductive loads is the primary duty.
What the Ratings Mean for Fit
The 400 A AC-1 rating is the headline number — it governs resistive load switching at up to 440 V AC. AC-1 means the contactor makes and breaks currents at or near the load current with minimal arcing, so it is not derated for motor starting (that would be AC-3 or AC-4). The 4 NO (normally open) power poles give you four independent switching paths, each rated for the full 400 A in AC-1. The 110 V AC control coil draws 650 VA inrush and 10 VA hold-in power, with dropout between 35-55% of nominal voltage — a wide dropout band that helps avoid nuisance dropouts on a sagging line.
Standards & Compliance
The contactor is certified to IEC 60947-1, IEC 60947-4-1, EN 60947-1, EN 60947-4-1, and JIS C8201-4-1. Rated insulation voltage is 1000 V per IEC 60947-4-1 and 1500 V per VDE 0110 group C. Overvoltage category III. The front face achieves IP20 with shrouds fitted. Protective treatment TH indicates tropicalisation for humid environments.
Mounting & Integration
This is a plate-mount contactor — not DIN-rail snap-on. Dimensions are 10.3 in wide x 8.1 in high x 8.6 in deep (261 x 206 x 219 mm). Power circuit connections accept lugs up to 240 mm² or bar 30 x 5 mm bolted; control circuit uses screw clamp terminals for 1-4 mm² flexible or solid wire. Tightening torque is 35 Nm on the power side and 1.2 Nm on the control side. Mechanical durability is rated at 10 million cycles, with a maximum operating rate of 2400 cycles per hour at 55 °C.