Technical Parameters
Specification Value
Product Type Installation Contactor
Series ESB24
Model ESB24-31
Number of Poles 4
Contact Configuration 3 Normally Open (NO), 1 Normally Closed (NC)
Rated Operational Current (AC-1) 24 A at 400 V AC
Rated Operational Power (AC-1) Up to ~5.5 kW (single-phase 230 V), ~16 kW (three-phase 400 V)
Rated Operational Current (AC-3) ~9 A (motor loads at 230 V or 400 V)
Control/Coil Voltage Typically 230…240 V AC/DC (varies with variant)
Rated Insulation Voltage (Ui) 500 V
Rated Impulse Withstand Voltage (Uimp) 6 kV
Mounting DIN-rail (TH35)
Degree of Protection IP20
Ambient Operating Temperature –25 °C to +55 °C
Pollution Degree 3
Rated Frequency Range 40…450 Hz
Mechanical Durability ~1,000,000 operations
Electrical Durability AC-1: ~150,000 cycles; AC-3: ~500,000 cycles
Dimensions (approx.) 36 × 85 × 65 mm (W × H × D)
Weight ~0.24 kg
Standards IEC/EN 60947 series
Typical Applications Lighting, HVAC, pumps, heaters, motor control, general load switching
The ABB ESB24-31 is a compact installation contactor designed for DIN-rail mounting and reliable switching of electrical loads in low-voltage distribution systems. It is commonly used in residential, commercial, and industrial electrical panels to control loads such as lighting, heating, pumps, small motors, and other equipment.