Siemens | NGB1B020V | Circuit Breaker | 20A | 1-Pole | 347V

Meet the Siemens NGB1B020V circuit breaker — a purpose-built, single-pole protection device engineered for commercial and industrial electrical systems that operate at 347V. This 20A breaker is a precise fit for retrofit, maintenance, or replacement projects where exact Siemens specifications are required, helping you keep panels and circuits running safely and reliably.

• Exact compatibility: Part number NGB1B020V ensures seamless integration with Siemens panels and distribution boards that call for this specific model.
• Targeted protection: 20A rating delivers dependable overload and short-circuit protection for a single branch circuit, reducing the risk of wiring damage and electrical fire hazards.
• 347V suitability: Designed for 347V electrical environments, a common configuration in many commercial facilities, so you can protect high-voltage circuits with confidence.
• Retrofit-ready: Ideal for upgrades or replacements where matching specs matters, enabling quick swap-ins with minimal panel downtime.
• Durable, dependable performance: Built to withstand routine cycling in active electrical spaces while maintaining consistent trip characteristics aligned with Siemens engineering standards.

Why choose this Siemens breaker? It delivers certainty in protection strategy for your 347V installations, ensuring that the right branch circuits are shielded without compromising panel design or compatibility. This isn’t a generic part — it’s a component that aligns with your existing Siemens infrastructure, helping you maintain system integrity and simplify future servicing.

Use cases

• Replacing an aging 1-pole breaker in commercial panels that service 347V distribution networks.
• Retrofits during panel upgrades where maintaining the exact part reference is critical for safety and warranties.
• Protecting individual branch circuits for lighting, receptacles, or small equipment in offices, retail spaces, and light industrial setups.

Compatibility and installation tips

Verify fit and ratings before ordering to ensure seamless integration with your Siemens panel. This model is specifically designed for 347V systems and 1-pole configurations, so confirm your panel’s accepted trip rating and pole count. For best results, install with the power fully de-energized and follow the manufacturer’s guidance for torque and seating to maintain reliable electrical contact.

Specification at a glance

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 347V
• Part number: NGB1B020V

Equip your panel with the exact Siemens protection you need. Add the NGB1B020V to your cart for reliable, precise circuit protection built to integrate smoothly with your existing Siemens infrastructure.