Siemens ED63A040 - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing Siemens ED63A040, a rugged 40 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and loadcenters. Available through AmpState, this unit is built for electricians and facilities professionals who demand reliable overcurrent and short-circuit protection in residential, commercial, and light industrial settings.

Why the ED63A040 stands out

Designed for harsh or vibration-prone environments, its secure bolt-on mounting delivers a rigid, vibration-resistant bus connection that helps maintain consistent electrical contact and minimize arcing. The integrated thermal-magnetic trip unit delivers precise response to overloads and short circuits, ensuring stable, repeatable protection across a wide range of operating conditions.

Core specifications

• Amperage rating: 40 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Applications: Branch circuit overcurrent and short-circuit protection
• Compatibility: Designed for use with matching OEM Siemens loadcenters and panelboards

Who benefits most? Electricians, facilities managers, and installers working with Siemens panels in homes, offices, retail environments, and light manufacturing. The 3-pole configuration is ideal for three-phase distribution where code-compliant protection and coordinated breaker phases are essential, while the 40 A rating fits mid-size branch circuits often found in commercial and light industrial panels.

Practical uses and expert tips

• Pair with compatible Siemens OEM loadcenters and panelboards to ensure optimal fit and protection integrity.
• Follow manufacturer torque specs on bolt-on connections to maintain a secure bus link and consistent performance over time.
• Use in retrofit projects to upgrade aging protection with a dependable, easily replaceable device that aligns with existing Siemens infrastructure.
• Plan circuits with awareness of startup surges and continuous loads in commercial spaces to minimize nuisance trips and maintain uninterrupted service.

In the real world, the ED63A040’s combination of robust mechanical mounting and precise thermal-magnetic protection translates to safer installations, reduced maintenance headaches, and longer panel life. For professionals seeking a reliable, standards-aligned solution in Siemens ecosystems, this 3-pole bolt-on breaker delivers proven performance when it matters most.