Square D QOU220 - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOU220 — a dependable 20A, 240V, 2-pole bolt-on molded case circuit breaker designed to guard your electrical system. Built for durable branch circuit overcurrent and short-circuit protection, this breaker fits seamlessly into panelboards and load centers, delivering reliable performance where it matters most.

• Bolt-on mounting for a secure, vibration-resistant connection
  The bolt-on design anchors firmly to the panel’s bus bars, helping maintain a rigid, stable connection even in environments with vibration or equipment movement. This translates to fewer loosening concerns and easier serviceability when you need to replace or upgrade.
• Thermal-magnetic trip unit for stable, repeatable protection
  Combining thermal overload sensing with magnetic short-circuit protection, the QOU220 provides fast, predictable trips that protect wiring and connected loads from damage without nuisance tripping in normal operation.
• OEM compatibility for reliable integration
  Designed to work with matching Square D OEM load centers and panelboards, ensuring proper fit, correct trip characteristics, and clean labeling when used as part of a system.
• Versatile for residential, commercial, and light industrial applications
  Ideal for 240V circuits in homes, offices, small warehouses, and light manufacturing setups that require solid branch-circuit protection with a compact, bolt-on form factor.

What this breaker protects

The Square D QOU220 safeguards branch circuits against overcurrent and short circuits, helping prevent wiring damage, overheated conductors, and electrical fires in panel installations. With a 20A rating on a 240V system, it’s well-suited for everyday loads such as outlets, lighting circuits, and small equipment feeders within the rated capacity.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: QOU220
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from the Square D QOU220

Electricians performing panel upgrades, homeowners replacing a failed breaker, property managers maintaining multi-tenant buildings, and small businesses needing reliable 240V branch protection will find the QOU220 a precise, durable choice. It’s especially valuable in installations where a robust, vibration-resistant connection and proven thermal-magnetic protection are priorities.

Practical tips for optimal use

Ensure compatibility with your OEM panelboard before installation, and follow the panel manufacturer’s instructions for bolt-tightening and wiring practices. When replacing a breaker, power should be off and circuits de-energized; keep a spare QOU220 on hand for quicker service. Regularly inspect for signs of overheating or loose connections in your panel, and replace with the same 2-pole 20A, 240V specification to maintain system integrity.