Siemens | NGB1B030 | Circuit Breaker | 30A | 1-Pole | 347V

Siemens NGB1B030 is a 30-amp, 1-pole circuit breaker rated for 347V, designed to protect a single hot leg in commercial and industrial electrical systems. Ideal for maintenance, retrofit, and replacement projects that require precise compatibility with the NGB family and Siemens panels.

Key specifications at a glance

• Amperage: 30 A
• Poles: 1-Pole
• Voltage rating: 347 V
• Reference: NGB1B030 (best compatibility reference)
• Part of the Siemens NGB series family

Why this Siemens breaker stands out

• Designed for straightforward replacement in panels that accept NGB-type devices, reducing downtime during maintenance or upgrades.
• 347V capability makes it suitable for commercial distribution and lighting circuits that run on higher voltage systems, helping protect wiring and equipment from overloads on a single leg.
• Reliability you expect from Siemens — engineered to trip consistently under fault conditions and protect downstream devices from damage.

Practical use cases

• Retrofit an existing panel to add a dedicated 30 A single-pole circuit on a 347 V distribution path.
• Replace a failed breaker in a Siemens panel where the original part number is NGB1B030.
• Protect critical 347V circuits such as lighting feeders, control circuits, or branch circuits in commercial installations.

Compatibility and installation tips

• Always confirm fit and ratings before ordering — the part number is the best reference for compatibility.
• Use in panels designed for Siemens NGB1B030-series devices and rated for 347V, 30A, 1-Pole configurations.
• Follow standard electrical safety practices: shut off main power, verify absence of voltage, and install per manufacturer guidelines.

Whether you’re performing routine maintenance, upgrading an old panel, or replacing a failed breaker, the Siemens NGB1B030 delivers dependable protection for a single 347V circuit. Keep your electrical system aligned with your original specifications by choosing the exact part number that matches your panel’s requirements.