Square D EJB36015 - 15 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D EJB36015 is a dedicated 15A, 600V, 3-pole bolt-on molded case circuit breaker built to safeguard branch circuits and protect panelboards and load centers from overcurrent and short-circuit events. Designed for reliable performance in residential, commercial, and light industrial environments, this breaker combines secure mounting with precise protective action to keep electrical systems safe and continuously operational.

Why the EJB36015 stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical contact and reducing the risk of loose connections in demanding installations.
• Thermal-magnetic trip unit provides stable, repeatable protection by automatically responding to both gradual overcurrent and sudden short-circuit conditions, helping to prevent damage to wiring and equipment.
• 3-pole design is ideal for balanced three-phase circuits common in commercial and light industrial panelboards, while still suitable for multi-wire residential applications where 3-phase protection is needed.
• OEM-compatible compatibility ensures seamless integration with matching Square D load centers and panelboards, simplifying replacement and upgrading projects without compatibility concerns.
• Designed for branch circuit protection and short-circuit protection, this molded case breaker helps you meet electrical code requirements and maintain system safety across installations.

Key specifications at a glance

• Manufacturer: Square D
• Part number: EJB36015
• Amperage rating: 15A
• Voltage rating: 600V
• Number of poles: 3
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and scenarios

• Upgrading or expanding panelboards in light commercial spaces where a reliable 3-pole 15A protection device is required.
• Protecting balanced three-phase circuits in small industrial setups, ensuring consistent protection across all phases.
• Replacing older bolt-on breakers in OEM panelboards with a compatible, durable Square D solution to maintain system integrity.
• Situations demanding a robust, vibration-resistant connection to minimize connection-related faults in environments with noticeable vibration or equipment start-ups.

How this breaker helps you manage safety and reliability

With its thermal-magnetic trip mechanism, the EJB36015 offers fast response to shorts while avoiding nuisance trips on minor inrush, helping maintain uptime for critical equipment. The bolt-on mounting reduces the risk of loose bus connections over time, which is a common cause of intermittent faults. Compatible with matching OEM load centers and panelboards, it reduces the guesswork during installation and ensures coordinated protection across the panel.

Practical tips for installation and care

• Verify your panelboard is rated for 600V and supports 3-pole bolt-on breakers before installation.
• Follow manufacturer torque specifications for bolt-on mounting to achieve the intended vibration resistance and electrical contact quality.
• Place this 15A breaker on circuits that truly require 15A protection to maintain proper coordination with upstream devices and downstream conductors.