Siemens RONIS Key-operated switch, 3 position, round, metal, shiny, 22mm Part number 3SU1050-4BM01-0AA0

Product Overview

The Siemens SIRIUS ACT key-operated switch (SKU: 3SU1050-4BM01-0AA0) is a 22 mm round, metal actuator with three switch positions (I > O < II). Operated with a RONIS key (SB30), it offers a momentary contact mechanism with an actuating angle of 2 × 45° and key removal in the central “O” position.

Key Features

• Key-operated with RONIS SB30 key (2 keys included)
• Three positions: I > O < II, key removable only in “O” position
• Momentary contact type; return on both sides
• Actuating angle: 45° clockwise and 45° anticlockwise
• Metal actuator and front ring, high-gloss finish (silver colour)
• Protection classes: IP66, IP67, IP69K on the operator front; terminal part IP20
• Designed for harsh industrial environments with high shock and vibration resistance

Technical Specifications

• Product Type: Key-operated switch, SIRIUS ACT series
• Article Number: 3SU1050-4BM01-0AA0
• Actuator Colour: Silver
• Material (Actuator): Metal
• Outer Diameter of Actuator: 29.5 mm
• Number of Switch Positions: 3
• Mounting Diameter: 22.3 mm (tolerance +0.4 mm)
• Mounting Height: 49.4 mm
• Installation Depth: 25.4 mm
• Operating Temperature: –25 °C to +70 °C
• Storage/Transport Temperature: –40 °C to +80 °C
• Mechanical Service Life (typical): 300,000 operations
• Weight (approx.): 78 g

Compliance & Certifications

• Protection to IP66, IP67 and IP69K for the operator front
• High shock and vibration resistance according to IEC 60068-2-27 (15g) and IEC 60068-2-6 (5g)
• Designed for industrial use (degree of protection NEMA 1/2/3/3R/4/4X/12/13)
• Global Warming Potential documented; eco-profile certified (Siemens EcoTech)

Applications

This key-operated switch is ideal for use in industrial control panels and automated systems where secure, controlled access is required—such as machine tool control, safety cabinets, or door interlock systems. Its high ingress protection, metal design and key-removable position support robust environments and operator safety.