ABB Stotz S&J EH Installation Contactor EH04-20N (1SAE901901R1020)

Controlling lighting or heating loads in residential and commercial buildings often requires a reliable switching device that can handle frequent operations without excessive wear. The ABB Stotz S&J EH Installation Contactor EH04-20N provides a compact, DIN-rail mountable solution for switching AC loads up to 20 A, ensuring dependable performance in building automation and control circuits.

Who is it for

Electricians, panel builders, and facility managers who need a space-saving contactor for lighting control, heating systems, or other AC loads in distribution boards. It is suitable for applications where silent operation and long mechanical life are important.

Main features

• 2 normally open (NO) main contacts for simple on/off switching of single-phase loads.
• Coil voltage of 230 V AC at 50/60 Hz, directly compatible with standard mains control circuits.
• Compact 1-module width (17.5 mm) saves space on 35 mm DIN rails in consumer units and control panels.
• High mechanical durability of 1,000,000 cycles and electrical durability of 150,000 cycles for long service life.
• Rated insulation voltage of 500 V and impulse withstand voltage of 4 kV for safe operation in typical installations.

Specifications

• Number of poles: 2
• Main contact configuration: 2 NO
• Rated operational current (AC-1): 20 A
• Control circuit voltage: 230 V AC
• Frequency: 50/60 Hz
• Rated operational voltage: 220 V AC
• Rated insulation voltage (Ui): 500 V
• Rated impulse withstand voltage (Uimp): 4 kV
• Mounting type: DIN rail (35 mm)
• Module width: 1 module (17.5 mm)
• Degree of protection: IP20
• Electrical durability: 150,000 cycles
• Mechanical durability: 1,000,000 cycles
• Power loss per pole: 0.2 W
• Ambient operating temperature: -25 to +55 °C

Tips

Ensure the coil voltage matches the control circuit to avoid malfunction. For higher inrush loads, verify the maximum inrush current capability against the load characteristics. Mount the contactor in an enclosure with suitable protection if used in dusty or humid environments.