Allen-Bradley 855T-B10BR6 Stack Light Control Tower

Allen-Bradley 855T-B10BR6 is a 70 mm control tower stack light with a blue lens, designed for conspicuous signaling on automation equipment. It uses a xenon strobe module powered from 120 VAC (±10%), 60 Hz, and features a black polycarbonate housing paired with a blue lens, IP65 and NEMA 4X protection, and a 70 mm outer diameter footprint. The unit is intended as a top module in a multi-light stack and, when combined with partner modules, supports a total stack of up to four light modules; the recommended wiring is 0.5 mm² with a 0.8 Nm terminal torque. Operating temperature ranges to -25 °C with storage down to -40 °C, making it suitable for challenging industrial environments. This particular model (855T-B10BR6) is a Rockwell Automation discontinued part as of October 1, 2019, with the functional replacement being the 856T-BB6 family.