Siemens SIRIUS 3SE5 Position Switch, Roller Plunger, 1NO+1NC, IP66/IP67 3SE5122-0CA00

In industrial automation, a position switch often monitors the end position of a machine part or guards access to a hazardous area. The Siemens 3SE5122-0CA00 is built for exactly that: a die-cast aluminum housing, a roller plunger actuator on top, and snap-action contacts that switch reliably even in tough environments.

Key specifications

• Series: SIRIUS 3SE5
• Actuator: Roller plunger, top
• Contacts: 1 NO + 1 NC, snap-action
• Connection: Screw terminals
• Rated operational current (AC-15): 6 A at 230 V
• Rated operational voltage (AC-15): 230 V
• Rated operational current (DC-13): 0.3 A at 230 V
• Rated insulation voltage: 400 V AC / 250 V DC
• Degree of protection: IP66, IP67
• Ambient operating temperature: -25 to +80 °C
• Mechanical service life: 15 million cycles
• Electrical service life: 100,000 cycles (AC-15, 230 V, 6 A)
• Cable entry: 1 x M20 x 1.5
• Housing: Die-cast aluminum, width 50 mm (EN 50041)

Why choose it

The sealed housing and wide temperature range make it suitable for washdown areas, outdoor installations, and heavy-duty machine tools. Snap-action contacts provide a crisp, bounce-free signal, and the standard 50 mm width fits common mounting patterns.

Ideal use cases

• End position sensing on conveyor systems
• Safety guard monitoring on presses and packaging machines
• Valve position feedback in process automation
• Limit switching on hoists and cranes

Good to know

This switch is part of the SIRIUS 3SE5 range and meets IEC 60947-5-1 and EN 50041. It is suitable for safety-related applications when integrated according to the relevant standards.