Siemens HED43B045 - 45 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HED43B045 is a 45A, 480V, 3-pole bolt-on molded case circuit breaker engineered to protect panelboards and load centers from damaging overcurrent and short circuits. Built for steady, repeatable protection in demanding electrical environments, this bolt-on unit delivers a secure, vibration-resistant connection and dependable performance when it matters most.

Solid, bolt-on reliability for demanding electrical panels

Designed for secure mounting, the bolt-on configuration provides a rigid bus connection that resists vibration and movement in commercial and light industrial applications. This ensures consistent fault protection and minimizes the risk of loose connections over time.

• Bolt-on mounting for a rigid, vibration-resistant bus connection
• Thermal-magnetic trip unit for stable, repeatable protection
• 3-pole configuration suitable for 3-phase systems
• 480V operation to handle higher-capacity branch circuits
• 45A amperage rating for controlled, protective disconnecting of circuits
• Compatible with matching OEM load centers and panelboards
• A proven solution for residential, commercial, and light industrial environments

How it works

The built-in thermal-magnetic trip unit combines thermal overload protection with instantaneous magnetic trip action. This dual approach reacts quickly to short circuits while preventing nuisance trips during normal load swings, helping keep equipment up and running and reducing maintenance calls.

Applications and ideal use cases

• Protecting branch circuits in panelboards and load centers within commercial spaces, industrial facilities, and mixed-use buildings
• Retrofits or upgrades to OEM-compatible panels that require 3-pole, 480V protection
• New installations in 3-phase distribution networks where reliable overcurrent protection is essential

Specifications at a glance

• Manufacturer: Siemens
• Part Number: HED43B045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Siemens HED43B045 for a robust, reliable solution that aligns with standard panelboard designs while delivering precise, predictable protection for 3-phase 480V systems. When reliability matters in electrical distribution, this bolt-on breaker from AmpState provides the performance you can trust day in and day out.