# Square D QO 340 40A 3-Pole Circuit Breaker - Reliable Protection

The **Square D QO 340 Circuit Breaker** is a 3-pole, 40A breaker designed for robust protection in residential and commercial electrical systems. This **QO 340** breaker ensures your circuits are safe and efficiently managed, preventing overloads and short circuits. Why choose the **Square D QO 340** for your electrical needs

-   **Superior Protection**: Prevents electrical overloads and short circuits
-   **Durable Construction**: Built to last with high-quality materials
-   **Easy Installation**: Simple to install, saving time and effort
-   **Wide Compatibility**: Suitable for various electrical systems
-   **Reliable Performance**: Ensures consistent and dependable operation

This **40A 3-Pole circuit breaker** is engineered to handle up to 240V AC, making it ideal for a wide range of applications. Its robust design includes a 10,000 Amp interrupting rating, providing enhanced safety and reliability. The **Square D QO series** is known for its high performance and durability, making the **QO 340** a trusted choice for electrical professionals.

Upgrade your electrical system with the **Square D QO 340** for reliable and efficient circuit protection. Ensure the safety and longevity of your electrical infrastructure today

## Details

- **Price:** 999.0 USD
- **Vendor:** Square D
- **Type:** Electrical > Circuit Breakers > QO Series
- **Tags:** 3-pole breaker, 40A breaker, circuit breaker, commercial circuit breaker, electrical protection, QO 340, residential circuit breaker, Square D

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Used | 999.00 USD | In stock |

## Images

- Square D QO 340 40A 3-Pole Circuit Breaker - Reliable Protection-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/square-d-qo-340-40a-circuit-breaker)
> Updated: 2026-09-19