Allen-Bradley 836T-T303J Pressure Control Switch

The Allen-Bradley 836T-T303J Pressure Control Switch is a two‑circuit, piston‑type industrial pressure switch in the 836T family built for traditional machine‑tool applications. It features an adjustable operating range of 350 to 5000 psi, an adjustable differential of 260 to 650 psi, and a surge/occasional pressure rating up to 1500 psi, making it suitable for demanding hydraulic or pneumatic control tasks. The unit employs copper alloy bellows and a piston without seal, providing durable performance in rugged industrial environments, and is configured as a 2‑circuit switch with factory‑set trip and reset settings tailored to the maximum operating range and minimum differential. Catalogued as 836T‑T303J, this model aligns with Rockwell Automation’s Bulletin 836T industrial pressure controls and is described in the accompanying machine‑tool/industrial literature as a traditional T‑style pressure control. In service, the switch closes or opens its contacts when the set pressure is reached, enabling reliable control of downstream equipment such as pumps, compressors, or other pressure‑regulated machinery. Given its broad 350–5000 psi range and robust piston/bellows construction, the 836T‑T303J is well suited for OEMs and service technicians seeking a proven, no‑nonsense pressure switch for high‑demand machines and systems.