Siemens HED42B125L - 125 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HED42B125L — a 125 A, 480 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, helping maintain consistent electrical performance even in demanding environments.

• Secure bolt-on mounting for a dependable, vibration-resistant bus connection that reduces connection loosening over time.
• Thermal-magnetic trip unit provides stable, repeatable protection against overcurrent and short-circuit events.
• OEM-ready compatibility engineered to work with matching Siemens OEM loadcenters and panelboards, simplifying installation and replacement.
• 125 A at 480 V, 2-pole configuration ideal for protecting critical 480 V branch circuits in commercial and light industrial settings.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HED42B125L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125 A
• Voltage Rating: 480 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical choice for professionals who manage panelboards and loadcenters in commercial facilities or light industrial environments where 480-volt distribution is commonplace. The HED42B125L delivers robust protection for essential circuits while maintaining straightforward compatibility with Siemens’ own panel systems, helping you simplify stocking, maintenance, and future replacements.

Why choose this Siemens breaker? It pairs a secure mounting method with a reliable thermal-magnetic trip mechanism, ensuring fast, predictable responses to electrical faults while minimizing false trips. Its 2-pole, 125 A design meets the needs of larger branch circuits, and its bolt-on format is built for installations where a solid, vibration-resistant connection matters. When you select the HED42B125L, you’re choosing a focused, purpose-built solution for effective 480 V protection in the spaces that rely on steady, uninterrupted power.