Siemens HED42B050 - 50 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HED42B050, a 50-amp, 480-volt, 2-pole bolt-on molded case circuit breaker designed for reliable branch circuit protection in modern panelboards and load centers. Built to handle demanding residential, commercial, and light industrial environments, this breaker delivers steadfast performance when it matters most.

• Secure bolt-on mounting: Eliminates movement and vibration that can loosen connections over time, providing a rigid, long-lasting bus connection that stays put through steady operation and periodic maintenance.
• Thermal-magnetic trip unit: Combines precise thermal protection for overload conditions with rapid magnetic response to short circuits, delivering stable, repeatable protection across a wide range of fault scenarios.
• OEM-compatible design: Specifically engineered to pair with Siemens OEM load centers and panelboards, making substitutions and upgrades straightforward without compatibility surprises.
• Two-pole protection: Simultaneous disconnection of both hot conductors enhances safety and ensures coordinated protection for two-phase circuits commonly found in commercial applications.
• Industrial-ready rating: 50A at 480V positions this breaker perfectly for mid-range electrical feeders, equipment feeds, and distribution circuits in light industrial setups.

This breaker isn’t just about specs—it’s about dependable protection that technicians can trust. The HED42B050 is ideal for equipment and circuits where a rugged, vibration-resistant connection matters and where a precise thermal-magnetic trip curve minimizes nuisance trips while delivering fast, decisive fault clearing.

Key use cases

• Replacing aging or failed breakers in Siemens panelboards and load centers that operate at 480V systems.
• Protecting branch circuits feeding motors, HVAC controls, lighting, and other mid-range loads in commercial buildings.
• Retrofit projects where a compact, bolt-on solution reduces installation time and risk of loose connections.

Technical snapshot

• Manufacturer: Siemens
• Part number: HED42B050
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 50A
• Voltage rating: 480V
• Number of poles: 2
• Mounting style: Bolt-on

Choosing the Siemens HED42B050 means opting for a product designed to align with Siemens’ panelboard ecosystems, reducing installation challenges and improving serviceability. Its robust construction and targeted protection features help facilities run smoothly, protect valuable equipment, and support compliant, safe electrical distribution environments.