Siemens HED42B025L - 25 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HED42B025L — a precise, dependable 25A, 480V, 2-pole bolt-on molded case circuit breaker designed to protect your electrical system where it matters most. Built for panelboards and load centers, this unit delivers a solid, vibration-resistant bus connection and consistent protection performance across a range of demanding environments.

Why the HED42B025L stands out

• Secure bolt-on mounting — engineered for a rigid, vibration-resistant bus connection that stays put in demanding panels and busy installations.
• Thermal-magnetic trip unit — provides stable, repeatable protection against overcurrents and short circuits, reducing nuisance trips and ensuring reliable interruption when needed.
• Siemens compatibility — designed to match Siemens OEM panelboards and loadcenters, enabling straightforward integration into existing systems.
• Two-pole, 480V operation — efficient control of 480V circuits with a compact, space-saving footprint ideal for commercial and light industrial setups.
• Branch circuit protection — specifically built for overcurrent and short-circuit protection of individual branches within a panelboard or loadcenter.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: HED42B025L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 25A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Designed for residential, commercial, and light industrial applications, the HED42B025L is a solid choice when a reliable two-pole breaker is needed to protect 480V branch circuits. It’s well-suited for retrofit projects in existing Siemens panelboards and loadcenters, as well as new installations where secure mounting and consistent trip performance matter. Use it to guard critical circuits such as lighting feeders, receptacle banks, or small motor loads that operate at 480V and require precise current limitation.

Installation and compatibility tips

• Ensure the panelboard or loadcenter is designed to accept bolt-on molded case breakers of this type and rating.
• Verify that the circuit’s voltage and amperage align with the 480V, 25A specifications to prevent nuisance trips or underprotection.
• Install with the recommended torque on mounting hardware to maintain the vibration-resistant benefits of the bolt-on design.
• Pair with other Siemens components in compatible panelboards to maintain uniform protection profiles and system performance.

What problems does it solve?

The HED42B025L provides dependable, targeted protection for 480V branch circuits, reducing the risk of damage from overcurrent and short-circuit events. Its thermal-magnetic trip mechanism delivers reliable responses under varying electrical conditions, while the bolt-on mounting ensures a solid, long-lasting connection even in environments with vibration or movement. For installers and building operators, it means fewer mismatches, straightforward replacement in Siemens ecosystems, and predictable protection for critical electrical loads.

If you’re upgrading or maintaining a Siemens panelboard or loadcenter and need a precise, durable 2-pole breaker for 480V services, the Siemens HED42B025L offers a clear, purpose-built solution with proven performance and easy integration.