Square D QOB220SWN - 20 A, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB220SWN is a 20 A, 2-pole bolt-on molded case circuit breaker engineered to safeguard panelboards and load centers from overcurrent and short-circuit events. Built for dependable performance across residential, commercial, and light industrial environments, this breaker combines rugged bolt-on mounting with a thermal-magnetic trip unit for stable, repeatable protection you can rely on.

• Bolt-on mounting: a secure, vibration-resistant connection to the bus to maintain consistent electrical contact even in panels exposed to movement or door operation.
• Thermal-magnetic trip unit: delivers precise tripping behavior for both overloads and short circuits, helping prevent nuisance trips while ensuring prompt fault interruption.
• OEM-ready compatibility: designed to fit matching Square D OEM load centers and panelboards, simplifying replacement and ensuring coordinated protection with your existing infrastructure.
• Versatile 2-pole, 20A configuration: suitable for 240V circuits and multi-wire branch circuits with shared neutrals in a variety of installations.
• Durable molded-case construction: robust insulation and enclosure designed to withstand the demands of panel installations in diverse environments.

Specifications at a glance

• Manufacturer: Square D
• Part number: QOB220SWN
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20 A
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit protection against overcurrent and short circuits

Who this is for: electricians, contractors, and facility managers seeking reliable, easily replaceable protection for panelboards and load centers. It’s ideal for installations requiring a compliant 2-pole 20A device to protect 240V circuits, small motors, lighting, or multi-wire branch circuits in homes, offices, retail spaces, and light industrial settings.

Use cases and practical benefits:

• Replacing a failed breaker in Square D panelboards without altering bus connections or panel fittings.
• Retrofit projects where vibration or long-term reliability is a concern, thanks to the secure bolt-on mounting.
• New installations needing a simple, OEM-compatible solution that preserves consistent trip performance with existing protection schemes.

With the QOB220SWN, you’re choosing a dependable, purpose-built solution for robust branch circuit protection. Its combination of secure mounting, precise thermal-magnetic protection, and OEM-compatible design helps shorten installation time, reduce maintenance concerns, and keep critical circuits safeguarded across the life of your panel system.