Square D QOB3255237 25A 3-Pole 240 V Circuit Breaker Potential Transformer

Square D QOB3255237 — a 25A, 3-Pole, 240 V circuit breaker with an integrated potential transformer. This reliable protection device not only interrupts fault current but also provides built-in measurement capabilities, making it a smart fit for modern electrical panels and energy-management setups.

What sets this unit apart is the combination of solid overcurrent protection with measurement-ready features. The 3-pole design ensures synchronized protection across all phases in three-phase systems, helping safeguard motors, feeders, and other equipment from damaging faults on a 240 V network. The 25 A current rating is well-suited for branch circuits and intelligent distribution where you need dependable protection without unnecessary trips.

• Integrated potential transformer: enables voltage monitoring and seamless interaction with metering systems, protection relays, and building automation for smarter energy management.
• Three-phase protection: ideal for commercial and light-industrial panels distributing 240 V across multiple motors and loads.
• Compact, space-conscious design: simplifies panel layout and wiring, easing installation in existing enclosures.
• Part Number: QOB3255237 — clearly identifiable for easy ordering and replacement within the Square D family.

Ideal for technicians and facilities teams upgrading or maintaining three-phase power distribution, this breaker delivers reliable fault protection while feeding measurement data into your monitoring and energy-management workflow. Use it in panels that require a sturdy 25 A, 3-pole 240 V protection device with the added benefit of a built-in potential transformer for monitoring and relay integration.

Specifications

• Part Number: QOB3255237
• Brand: Square D
• Current Rating: 25 A
• Poles: 3
• Voltage Rating: 240 V
• Type: Circuit Breaker with Integrated Potential Transformer