Square D QOB3301021 - 30 A, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Square D QOB3301021 — a 30A, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. Designed to handle overcurrent and short-circuit events with precision, it’s a purpose-built solution for residential, commercial, and light industrial electrical systems.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays put even in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, ensuring reliable response to both overloads and short circuits.
• 3-pole design protects three conductors simultaneously, promoting coordinated shutoff for safe, predictable operation in multi‑phase circuits.
• OEM-compatible compatibility with matching Square D loadcenters and panelboards helps you extend or retrofit existing electrical infrastructure without compatibility concerns.
• Amperage rating of 30A is ideal for circulating protection in medium-load circuits while maintaining headroom for startup surges common in commercial equipment and certain residential setups.
• Molded case construction for durability and long service life in typical service environments found in panelboards and loadcenters.
• Part number QOB3301021 from Square D ensures you’re sourcing a trusted, standardized component for reliable replacement and maintenance.

The QOB3301021 is a practical choice when you need robust, code-conscious protection that won’t compromise system performance. Its bolt-on mount and vibration-resilient connection make it especially well-suited for panels where physical stability and dependable trips matter most, such as equipment racks, commercial luminaires, and other distributed loads in light industrial settings.

Who benefits most

• Electrical contractors replacing aging or failed breakers in panelboards and loadcenters
• Facilities managers safeguarding critical branch circuits in small to mid-size commercial spaces
• Residential settings with multi‑breaker panel assemblies requiring reliable, coordinated protection

Specifications at a glance

• Manufacturer: Square D
• Part Number: QOB3301021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Square D QOB3301021 for a reliable, OEM-compatible solution that aligns with real-world use cases and installation realities. When you need predictable protection, stable operation, and a plug‑and‑play approach to upgrading or maintaining your panel ecosystems, this 30A, 3-pole bolt-on breaker from AmpState delivers.