Square D QO3125SL 125A 3P 240V Circuit Breaker | AmpState

The Square D QO3125SL is a 125 A, 3-pole, 240 V circuit breaker designed for reliable circuit protection in panelboards, load centers, and electrical distribution systems. It’s a smart pick for maintenance teams, panel builders, and spare inventory where a direct part-number match matters, and AmpState makes it easy to source the exact part you need.

Built to integrate with the Square D QO-series ecosystem, the QO3125SL delivers predictable tripping performance and straightforward replacement in existing installations. By matching a precise part number, you minimize downtime and reduce the risk of compatibility issues during maintenance or upgrades.

Key specifications

• Manufacturer: Square D
• Part Number: QO3125SL
• Product Type: Circuit Breaker
• Amperage: 125 A
• Poles: 3
• Voltage: 240 V
• Availability: AmpState

Ideal use cases

• Panelboards and load centers in commercial and light industrial settings requiring 125 A protection on three-phase 240 V circuits
• Spare-inventory for field service, ensuring quick replacements with exact part-number compatibility
• Maintenance planning and panel upgrades where a direct fit minimizes installation risk and downtime
• New builds that rely on a proven Square D QO-series protection strategy

Why this matters for your project

• Exact fit, fewer compatibility concerns: Using the precise QO3125SL part-number reduces mis-orders and speeds service calls.
• Reliable protection for 3P 240V systems: Appropriate for distributing power safely across three hot legs in a panel.
• Efficient sourcing through AmpState: Clear part identification and straightforward purchasing support help your project stay on schedule.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Secure this 125 A, 3-pole, 240 V Square D QO3125SL circuit breaker from AmpState today to ensure accurate protection for your distribution system and smooth maintenance planning.