Technical Parameters General Product Type: Contactor relay / auxiliary contactor Model: NF40E‑13 Series: NF relay series Number of Poles / Contacts: 4 × Normally Open (NO) Mounting: DIN‑rail or screw mounting in control panels Terminal Type: Screw terminals Housing Design: Block‑type compact relay Weight: ~0.27 kg Operating Ambient Temperature: Approximately −40 °C to +70 °C Control / Coil Rated Control Supply Voltage (Uc): 100 – 250 V AC/DC (single wide range coil) Rated Frequency: 50 / 60 Hz for AC coil operation Control Circuit Compatibility: AC or DC operation without separate coil changes Electrical Ratings Rated Insulation Voltage (Ui): ~690 V Rated Operational Voltage: Auxiliary circuit circuits up to 690 V Conventional Free‑air Thermal Current (Ith): 16 A (free‑air at 40 °C) Rated Operational Current (AC‑15): ~6 A @ 24 / 127 V AC ~4 A @ 220 / 240 V AC ~3 A @ 400 / 440 V AC ~2 A @ 500 / 690 V AC Rated Operational Current (DC‑13): ~6 A @ 24 V DC ~2.8 A @ 48 V DC ~1 A @ 72 V DC ~0.55 A @ 125 V DC ~0.27 A @ 250 V DC ~0.15 A @ 400 V DC ~0.13 A @ 500 V DC ~0.10 A @ 600 V DC Performance & Switching Rated Impulse Withstand Voltage (Uimp): ~6 kV Rated Short‑time Withstand Current (Icw): ~140 A for 0.1 s ~100 A for 1 s Maximum Electrical Switching Frequency: ~1200 cycles/hour (AC‑15) ~900 cycles/hour (DC‑13) Maximum Mechanical Switching Frequency: ~6000 cycles/hour Mechanical & Connection Connecting Capacity: Flexible conductor with ferrule: ~0.75 … 2.5 mm² Rigid conductor: ~1 … 2.5 mm² Wire Stripping Length: ~10 mm Tightening Torque: Standard industrial terminal torque (approx. 1.2 N·m) Environmental & Protection Protection Rating: Terminals: IP20 Panel installation provides typical front panel protection Pollution Degree: Suitable for industrial environments Maximum Operating Altitude: Up to ~3000 m without derating Applications Switching of auxiliary and control circuits in automation panels Interface between control logic (PLC, control switches) and load circuits Signal switching in industrial machinery and power systems Pilot duty and control relay roles in electrical panels