Siemens LGB3B025B - 25 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens LGB3B025B is a robust 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection where it matters most—panelboards and loadcenters. With a 25 A rating and a 600 V maximum, this unit is built to handle multi-phase electrical setups in residential, commercial, and light industrial environments while maintaining stable protection across varying loads and temperatures.

Key advantages that set this breaker apart

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, reducing movement and wear that can lead to nuisance trips or loose connections over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding appropriately to both long-term overcurrent and instantaneous short-circuit events.
• Molded case design minimizes arc fault exposure and fits seamlessly with standard panelboard architectures, simplifying replacement and maintenance.
• OEM compatibility designed to work with matching Siemens OEM loadcenters and panelboards, ensuring a cohesive protection solution across your electrical system.
• Versatile three-pole configuration ideal for three-phase circuits, common in commercial and light industrial applications, while still suitable for certain residential multi-wire installations.

Why this matters for your electrical system

• Protects critical feeders and branch circuits from overcurrent, helping prevent wiring damage, overheating, and electrical fires.
• Its thermal-magnetic trip offers precise coordination with other protective devices, reducing unnecessary trips and downtime.
• Bolt-on mounting simplifies field replacement and ensures a durable bus connection even in environments with vibration or movement.

Ideal use scenarios

• New installations in three-phase panelboards or load centers for commercial spaces and light industrial machinery.
• Upgrading or replacing aging protection in existing Siemens systems where OEM compatibility is important.
• Integrated protection in multi-circuit residential panels that require reliable 3-pole overcurrent protection for compliant, safe operation.

Technical snapshot

• Manufacturer: Siemens
• Part Number: LGB3B025B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 25 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Siemens LGB3B025B when you need a reliable, OEM-compatible protection solution that combines secure mounting, precise protection, and practical durability for demanding panelboard or loadcenter configurations. This 25 A, 600 V, 3-pole bolt-on breaker is a thoughtful, value-driven choice for electricians and facilities managers prioritizing long-term safety and system integrity.