General Electric THN3366 - 600A, 600V, 3-Pole, Fused Disconnect Switch

The General Electric THN3366 is built for power, reliability, and safety in demanding industrial and commercial environments. This 3-pole fused disconnect switch delivers dependable electrical isolation at high currents, making it a cornerstone for safe maintenance, efficient shutdowns, and consistent system uptime.

Why the THN3366 stands out

• High-capacity performance: 600A amperage rating paired with a 600V voltage rating handles heavy feeder lines and motor circuits with confidence.
• Three-pole design: Ensures balanced switching of all three phases for comprehensive isolation and safer fault handling.
• Fused protection: Built-in fusing interrupts fault currents to protect downstream equipment and wiring, reducing downtime from unexpected faults.
• Lockout/Tagout compatibility: Designed to support proper lockout/tagout procedures, helping facilities meet safety standards and prevent accidental energization during servicing.
• Long-term durability: Engineered for rugged industrial use, delivering reliable disconnection under load and sustained performance in tough environments.

Practical uses and scenarios

Ideal for feeders, motor control circuits, and service entrances where secure de-energization is essential. Use the THN3366 to isolate power before maintenance on heavy equipment, emergency shutdown sequences, or routine energy management tasks. Its robust design makes it a trusted choice for panel updates, MCCs, and commercial facilities that require frequent isolation with predictable results.

What this means for your operation

• Safety first: Reliable isolation under load minimizes risk during maintenance and service work.
• Compliance support: Clear lockout/tagout compatibility helps you align with safety regulations and employer responsibilities.
• Operational resilience: Durable construction reduces the need for frequent replacements, keeping downtime to a minimum.

Specifications at a glance

• Amperage rating: 600A
• Voltage rating: 600V
• Number of poles: 3-Pole
• Product type: Fused Disconnect Switch
• Brand: General Electric
• Model: THN3366

Choose the GE THN3366 for a robust, safety-conscious disconnect solution that delivers dependable performance in the most demanding electrical installations. It’s built to isolate power cleanly, protect downstream equipment, and support your safety programs with confidence.