Allen-Bradley 1492-CB3H250 25A 3-Pole 277 V Circuit Breaker

Engineered for reliable protection in commercial and light-industrial power distributions, the Allen-Bradley 1492-CB3H250 is a 25 A, three-pole circuit breaker crafted for 277 V systems. With a 3‑pole design, it securely interrupts all three hot legs in a 3‑phase circuit, helping to guard motors, conveyors, HVAC equipment, and other essential loads from overcurrent events.

• Current rating: 25 A
• Poles: 3
• Voltage rating: 277 V
• Part number: 1492-CB3H250
• Brand: Allen-Bradley

Why this matters

• Designed for 277 V three‑phase distribution, making it a precise fit for commercial electrical gear and power panels that rely on stable, predictable protection.
• Part of the Allen-Bradley lineage, offering a familiar mounting footprint and replacement compatibility for existing panel boards and control setups that use the 1492 family.
• Provides dependable trip characteristics across three phases, helping reduce downtime and extend motor life in demanding environments.

Ideal applications

• 3‑phase motors and driven equipment in manufacturing floors, packaging lines, and material handling systems.
• Commercial HVAC compressors and climate-control equipment fed from 277 V distributions.
• Large lighting runs and other 3‑phase loads in office complexes, schools, hospitals, and data centers with 277 V systems.

Practical guidance for use

• Verify panel compatibility with the 1492‑CB3H250 footprint and ensure the system operates at 277 V three‑phase where required.
• When replacing an old breaker, match the trip curve and installation guidelines to minimize nuisance trips and maintain panel safety margins.
• Follow standard electrical safety practices during installation: de‑energize the system, secure all connections, and torque to the panel’s specifications.

With its precise 25 A rating and robust 3‑pole design, the Allen-Bradley 1492-CB3H250 delivers targeted protection for three‑phase loads at 277 V while maintaining seamless compatibility with existing Allen‑Bradley panels and spare parts inventories. It’s a practical, durable choice for keeping critical systems running smoothly and safely.