Siemens HED43B020 - 20 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HED43B020 is a 20A, 480V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built for robust performance in residential, commercial, and light industrial environments, this unit fits seamlessly into OEM load centers and panelboards, providing a reliable protection solution for three-phase circuits.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loosening and ensuring consistent protection in panels exposed to movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable performance across varying loads and temperatures, with fast response to short-circuit faults and overloads.
• 3-pole, 480V protection ideal for three-phase circuits, motor feeders, and controlled power distribution in small to mid-sized facilities.
• 20A rating safeguards downstream devices while enabling coordinated protection across multi-branch panel configurations.
• OEM-compatible design is specifically intended for use in Siemens and matching OEM panelboards and load centers, simplifying installation and future maintenance.
• Molded case construction offers durable insulation and safer handling in everyday electrical work, with a compact form factor for easier panel integration.
• Versatile applications suitable for residential panels, commercial electrical rooms, and light industrial equipment enclosures, where reliable three-phase protection is essential.

Technical details

• Manufacturer: Siemens
• Part number: HED43B020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 480V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for stocking in service fleets or integration into new or replacement panel projects, the Siemens HED43B020 offers precise protection where three-phase power matters. When reliability matters and panel integrity is a priority, this bolt-on breaker from Siemens—available through AmpState—delivers a dependable, drop-in solution for your 3-pole 480V installations.