Siemens LGB3B020B - 20A, 3-Pole, Circuit Breaker

Meet the Siemens LGB3B020B—a 20A, 3-Pole circuit breaker engineered for dependable overcurrent protection in demanding electrical systems. This robust device is designed to guard three-phase circuits with precision, making it an ideal choice for panelboards, switchboards, and control panels in industrial, commercial, and OEM environments.

Three-pole, three-phase protection

The 3-Pole configuration ensures synchronized protection across all three phases, helping to prevent unbalanced loads and reducing the risk of motor damage, wiring faults, and unplanned outages. With a 20A rating, it provides the right level of protection for common three-phase distribution circuits and motor-driven equipment.

Why it stands out

• Reliable Siemens engineering delivers consistent trip performance and long-term durability in tough environments.
• Simplified integration fits into standard distribution enclosures, streamlining installation, maintenance, and replacement in existing systems.
• Versatile applications suited for industrial plants, commercial facilities, and OEM equipment requiring robust, coordinated protection for three-phase power.

Ideal use cases

• Motor control centers (MCCs) and industrial panelboards where three-phase protection is essential.
• Commercial HVAC equipment and other three-phase installations needing reliable overcurrent protection.
• Original equipment manufacturing (OEM) applications that demand consistent, repeatable circuit protection.

Specifications at a glance

• Current rating: 20 A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Practical guidance for best results

Install the LGB3B020B in suitable three-phase distribution panels or control panels where safe, reliable interruption of fault currents protects motors, drives, and wiring. For ongoing reliability, pair it with proper enclosure mounting, secure electrical connections, and routine inspection as part of your preventive maintenance program. Its three-pole design offers streamlined wiring and faster diagnostics when faults occur, helping keep uptime high and maintenance costs predictable.