Square D QF370 - 70A, 3-Pole, Circuit Breaker

Meet the Square D QF370 — a rugged 70 A, 3-pole circuit breaker designed to safeguard demanding electrical systems with precision and reliability. Built for performance in real-world environments, this unit excels at protecting both equipment and personnel by delivering dependable overcurrent protection where it matters most.

• 70 A rating provides strong protection for feeders and moderate-load circuits without unnecessary nuisance tripping.
• 3-pole configuration offers balanced, three-phase protection, ideal for modern industrial and commercial 3-phase power systems.
• Versatile mounting and application— suitable for use in panelboards, switchboards, and control panels where space and reliability are at a premium.
• Designed for demanding environments this breaker is a practical choice for industrial facilities, commercial installations, and OEM equipment where secure operation and dependable protection are critical.
• Compatibility within the Square D ecosystem ensures consistent performance with common bus systems and accessories, simplifying upgrades and replacements in existing panels.

Why this matters in real-world power systems

Three-phase loads, motor feeders, and distributed circuits demand protection that trips predictably and safely on fault conditions. The QF370 delivers that reliability in a compact package, helping prevent equipment damage, reduce downtime, and support safer start-up sequences in motor control centers and distribution panels. By choosing a 70 A, 3-pole breaker, you align with standard three-phase protection practices, easing maintenance and future planning.

Ideal use cases

• New installations in manufacturing lines where three-phase protection is essential for motors and drives.
• OEM equipment builds that require a dependable 3-pole breaker integrated into control panels or switchgear.
• Upgrades or retrofits of existing distribution panels to enhance overcurrent protection and circuit reliability.
• Motor control centers and panelboards in commercial facilities needing robust, consistent protection for critical loads.

Technical snapshot

• Current rating: 70 A
• Poles: 3-Pole
• Breaker type: Circuit Breaker
• Applications: panelboards, switchboards, and control panels
• Ideal for: industrial, commercial, and OEM applications requiring dependable overcurrent protection and safe operation in distribution equipment

Whether you’re building a new distribution panel, upgrading an existing motor control center, or stocking a dependable replacement part for OEM equipment, the Square D QF370 delivers targeted protection with confidence. Rely on proven performance from a trusted brand to keep circuits safe, uptime high, and workflows uninterrupted.