Square D EJB36040 - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EJB36040—a reliable, high-performance bolt-on circuit breaker designed to protect your panelboards and loadcenters with precision. With a 40 A rating, 600 V maximum, and a 3-pole configuration, this molded case breaker is built for demanding residential, commercial, and light industrial applications where dependable overcurrent and short-circuit protection is non-negotiable.

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical contact even in environments with movement or thermal cycling.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overload and short-circuit conditions, helping to minimize nuisance trips and protect wiring and equipment.
• 3-pole design supports 3-phase circuits and balanced protection across all poles, making it suitable for a broad range of commercial and light industrial panel setups.
• 600 V rating accommodates higher voltage distributions commonly found in modern electrical systems, expanding its versatility beyond basic residential panels.
• OEM-compatible with matching Square D loadcenters and panelboards, ensuring straightforward substitution or expansion without compatibility concerns.
• Durable molded case construction for reliable insulation and long service life in everyday panel installations.

Ideal use cases

• New installations or panel upgrades in residential, commercial, and light industrial environments where a 40 A, 3-pole breaker is required.
• Branch circuit protection in service entrances, distribution panels, and subpanels to isolate faults and safeguard conductors.
• Motor control and equipment panels that operate on 3-phase systems up to 600 V, delivering quick, predictable trips when faults occur.

Technical snapshot

• Manufacturer: Square D
• Part Number: EJB36040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Square D EJB36040 means leaning on a legacy of dependable protection and straightforward integration with your existing equipment. It’s a practical, purpose-built solution for safeguarding wiring, preventing equipment damage, and maintaining service continuity across multiple installation scenarios. Order from AmpState today to secure authentic Square D parts designed to meet the demands of real-world electrical systems.