Square D QOB2701021 - 70 A, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOB2701021 — a 70A, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for steady performance in real-world setups, it’s the reliable choice when you’re upgrading or replacing breakers in residential, commercial, and light industrial installations.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose connections and arcing in environments with movement or vibration.
• Thermal-magnetic trip unit offers stable, repeatable protection—thermal response handles sustained overloads while the magnetic element rapidly clears high-energy faults for quick isolation.
• 2-pole, 70A design supports balanced protection for multi-wire circuits and critical branch loads, making it ideal for main or branch circuit protection in panelboards.
• OEM-compatible is specifically designed to pair with matching Square D OEM load centers and panelboards, ensuring fit, performance, and installation uniformity.
• Versatile application suited for residential panels, commercial applications, and light industrial environments where reliable short-circuit and overcurrent protection is essential.

Technical snapshot

• Manufacturer: Square D
• Part Number: QOB2701021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70A
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical usage notes: When integrating this breaker, plan for a 70A circuit profile and ensure your panelboard specifications align with a bolt-on, 2-pole configuration. For upgrades or replacements, verify OEM compatibility with your Square D load center to preserve performance characteristics. The bolt-on design not only simplifies installation but also helps maintain a solid, long-lasting connection in panels that see regular cycling and occasional vibrations.

Whether you’re wiring a new panel or upgrading an aging distribution board, the Square D QOB2701021 delivers decisive protection with a robust mounting approach and a protection scheme you can trust.