Siemens SIRIUS ACT Emergency Stop Pushbutton 1NO+1NC 40mm Red Mushroom Head Screw Terminal

The Siemens 3SU1100-1HB20-1FH0 is a high-quality emergency stop pushbutton from the SIRIUS ACT series, designed for industrial safety applications. Featuring a red mushroom-type actuator with a 40 mm diameter and positive latching mechanism, it ensures reliable emergency stop functionality. The device includes one normally open (NO) and one normally closed (NC) contact, with screw terminals for secure wiring. Its yellow backing plate with 'EMERGENCY STOP' inscription provides clear visibility. Rated for harsh environments with IP66, IP67, IP69, and IP69K protection, it withstands dust, water, and high-pressure cleaning. Compliant with IEC/EN 60947-5-1 and 60947-5-5 standards, it offers mechanical and electrical durability of 100,000 operating cycles.

Advantages

Robust construction ensures long service life in demanding industrial settings. The positive latching mechanism guarantees safe operation, while the pull-to-unlatch release prevents accidental reset. High ingress protection allows use in wet or dusty environments. Screw terminals simplify installation and maintenance.

Suitable for

• Industrial machinery emergency stop circuits
• Automation systems requiring safety shutdown
• Control panels in manufacturing plants
• Process industry applications

Key specifications

• Series: SIRIUS ACT
• Product Type: Emergency Stop Pushbutton
• Actuator: Mushroom-type, red, 40 mm diameter
• Mounting Diameter: 22 mm
• Contact Configuration: 1 NO + 1 NC
• Terminal Type: Screw terminals
• Protection Class: IP66, IP67, IP69, IP69K; NEMA 1, 2, 3, 3R, 4, 4X, 12, 13
• Rated Insulation Voltage (Ui): 500 V
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Operating Temperature: -25 to +70 °C
• Mechanical Life: 100,000 cycles
• Electrical Life: 100,000 cycles (AC-15, 230V, 6A)
• Standards: IEC 60947-5-1, EN 60947-5-1, IEC 60947-5-5, EN 60947-5-5

Recommendations

For optimal safety, integrate this emergency stop pushbutton into a properly designed safety circuit. Ensure correct wiring of the NC contact for fail-safe operation. Suitable for use with Siemens SIRIUS ACT accessories.