PT333 - 100A, 277V, 3-Pole, Disconnect Switch

Meet the PT333, a purpose-built Disconnect Switch engineered for safe, reliable electrical isolation in demanding industrial and commercial environments. With a 100A amperage rating, a 277V voltage rating, and a true 3-Pole configuration, this switch ensures all live conductors are isolated with a single, decisive action. Its design supports proper lockout/tagout procedures and delivers dependable disconnection under load, making it a trusted partner for ongoing facility safety and uptime.

Why PT333 stands out

• Full-pole isolation: The 3-Pole design guarantees simultaneous disconnection of all hot legs, reducing arc-flash risk and preventing partial energization during maintenance.
• Lockout/Tagout readiness: Built to integrate with standard lockout devices, enabling compliant, verifiable safety procedures.
• Under-load reliability: Engineered to break the circuit cleanly even when equipment is energized, minimizing risk during service or reset.
• Industrial durability: Robust construction for daily operation in busy facilities, with reduced wear and long service life.

Key specifications

• Amperage rating: 100A
• Voltage rating: 277V
• Poles: 3-Pole
• Product type: Disconnect Switch
• Model: PT333

Ideal use cases

• Electrical rooms and service panels requiring a clear, physical isolation point
• Maintenance shutoffs for motors, conveyors, pumps, and HVAC equipment
• OEM equipment where a dedicated, compliant disconnect is part of the control scheme
• Any facility implementing robust lockout/tagout and safe startup/shutdown procedures

How the PT333 delivers real value: By providing a reliable, easy-to-operate single-action disconnect, it simplifies safety compliance and reduces the chances of accidental energization during maintenance. Compared to simpler or partial disconnects, the PT333 ensures that all conductors are safely isolated, giving technicians a clear and verifiable safety boundary before work begins. It’s not just a switch—it’s a core piece of your safety-first electrical infrastructure.

Practical guidance: Install the PT333 in appropriate industrial or commercial applications where 100A at 277V is suitable. Pair with lockout/tagout devices and ensure accessibility for authorized personnel. Regularly inspect mounting and terminals as part of your preventive maintenance to sustain long-term performance.