SIEMENS 3SU1153-6AA20-1AA0 Pilot Light Red Round 22 mm 120 V AC

Industrial Pilot Light

The SIEMENS 3SU1153-6AA20-1AA0 is a 22 mm round indicator designed for 120 V AC control circuits. Its red LED lamp and metal body suit panel builders who need a visible status signal in machinery or process equipment. The unit mounts in a standard cut-out and carries NEMA 1, 12, 2, 3, 3R, 4, 4X plus IP67 and IP69K ratings for harsh environments. Buyers who require a different voltage or colour must select another part number.

Continuous Operation

The integrated LED module runs at full 120 V AC without an external resistor, so heat dissipation stays constant during extended shifts. The zinc-alloy housing and plastic lens resist vibration, coolant splash and high-pressure wash-downs rated to IP69K. No replaceable bulb means light output does not degrade from socket corrosion over time. Installations that demand flashing or multi-colour sequences cannot use this fixed-output model.

Panel Installation

A single 22 mm clearance hole accepts the round body, and screw terminals secure wiring without special tools. The smooth lens prevents dirt traps that could obscure the red indication in dirty plants. REACH, RoHS and WEEE (2012/19/EU) compliance simplifies regulatory paperwork for European markets. Technicians who prefer push-in or spring-cage terminals will need a different operator series.