Square D EHB34040 - 40A, 3-Pole, Circuit Breaker

Square D EHB34040 is a rugged 40A, 3-Pole circuit breaker engineered for dependable overcurrent protection in demanding electrical environments. Built for industrial and commercial use, this device is designed to safeguard your distribution panels, switchboards, and control panels with consistent, reliable performance.

• 3-Pole configuration: a true three-phase breaker that interrupts all three lines simultaneously, reducing the risk of phase imbalance in 3‑phase systems.
• 40A current rating: precise protection for feeders and motor circuits, helping prevent damage from overloads and minimizing unplanned downtime.
• Versatile installation: suitable for panelboards, switchboards, and control panels across industrial, commercial, and OEM applications.
• Industrial reliability: built by Square D to deliver consistent operation in demanding environments where safety and performance matter most.

Key specifications

• Current rating: 40A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Use cases and real-world scenarios

• New installations in distribution panels and motor control centers where reliable three-phase protection is essential.
• OEM applications that require robust overcurrent protection integrated into custom control enclosures.
• Repairs and maintenance in commercial and industrial facilities where consistent circuit protection keeps critical equipment online.

Choosing the Square D EHB34040 means opting for a durable, purpose-built solution that aligns with the needs of modern electrical systems. Its 3-Pole design and 40A rating deliver clear, actionable protection for three-phase loads, helping you maintain safety, reduce nuisance trips, and extend the life of equipment in distribution panels and motor control centers.