Siemens LGG3B020 - 20 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Siemens LGG3B020—a 20A, 600V, 3-Pole molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and loadcenters. This device leverages a thermal-magnetic trip unit for stable, repeatable protection, helping your electrical system respond quickly to overloads or short circuits while minimizing nuisance trips. Available through AmpState, it’s a trusted choice for professionals prioritizing reliability and panel space efficiency.

Why the LGG3B020 stands out

• Compact molded-case design maximizes panel space, making it easier to fit multiple breakers in tight enclosures without compromising accessibility or future expansion.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal sensing for overloads with magnetic tripping for short circuits—reducing the risk of unpredictable trips.
• 3-pole configuration supports three-phase circuits and multi-wire branch circuits, offering versatile protection for modern commercial and light industrial loads.
• 20A, 600V rating provides robust protection for a wide range of branch circuits, balancing performance and safety in both low- and mid-range voltage environments.
• OEM panel compatibility engineered to pair with matching Siemens loadcenters and panelboards, ensuring a seamless, reliable replacement or upgrade.
• Versatile applications suitable for residential, commercial, and light industrial settings, covering a broad spectrum of protection needs.

What problems this breaker solves

• Prevents damage from overcurrent and short circuits by quickly interrupting fault current at the panel level.
• Provides a predictable protection profile with a thermal-magnetic trip curve, reducing nuisance trips and downtime.
• Maximizes panel efficiency by offering a compact form factor that leaves room for future circuit additions or reconfigurations.
• Ensures compatibility with Siemens OEM loadcenters and panelboards, simplifying maintenance, replacements, and inventory management.

Ideal use cases

• New installations or upgrades in Siemens OEM panels within residential, commercial, or light industrial electrical spaces.
• Replacement or refurbishment of aging breakers in panelboards that require three-pole, 20A protection for three-phase or multi-wire circuits.
• Loadcenter configurations where space is at a premium but reliable overcurrent and short-circuit protection is essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: LGG3B020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

With the LGG3B020, you’re choosing a balanced, purpose-built solution that aligns with standard Siemens panel designs while delivering dependable protection for a wide range of circuits. For electricians and facility managers, this breaker offers a straightforward path to safe, code-compliant electrical distribution in both new builds and retrofits.