The Square D 40 Amp Plug-In 2-Pole Circuit Breaker is a compact, dependable safety device designed for indoor panels. Part of the QO series, this two-pole breaker delivers precise overcurrent protection for 120/240V circuits, safeguarding wiring and connected equipment with confidence.
Engineered for fast, field-friendly installation, the plug-in mounting design allows quick swaps without rewiring. The 2-pole configuration ensures both hot legs trip together, protecting multi-wire branch circuits and reducing the risk of neutral overload. This unit is UL Listed and CSA Listed, confirming it meets rigorous safety and performance standards.
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Amperage and poles: 40 A, 2-Pole
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Voltage: 120/240 V
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Mounting: Plug-In for fast, tool-free installation
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Series and type: Square D QO, Circuit Breaker, Plug-In protection
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Listings: UL Listed and CSA Listed
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Physical footprint: 2 spaces in a panel; dimensions 3.2 in W x 1.5 in H x 3.1 in D
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Packaging: Sleeve packaging
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Indoor use: Suitable for indoor electrical panels
Ideal for residential or light commercial panels that require reliable 40A protection, this breaker supports circuits for large appliances and equipment such as air conditioning systems, pumps, and other demanding loads while maintaining a tidy 2-space panel layout.
With the proven reliability of the Square D QO family, this plug-in breaker offers predictable performance, straightforward replacement, and long-lasting protection for your electrical system.
