NGB3B050B - 50 Amp Circuit Breaker

NGB3B050B - 50 Amp Circuit Breaker

Engineered for dependable performance in demanding installations, the Siemens NGB3B050B is a high‑capacity circuit breaker that safeguards your electrical infrastructure without fail. Its thermal‑magnetic trip mechanism delivers reliable protection against both overloads and short circuits — giving you confidence that your circuits are defended under heavy loads or unexpected surges. This 50 A, 3‑pole breaker supports a broad voltage range and is built to meet the rigorous needs of commercial and industrial electrical systems. With its compact form factor, straightforward installation, and adherence to strict safety standards, the NGB3B050B is an excellent choice for upgrading existing panelboards or outfitting new ones, ensuring long-term reliability for your electrical setup.

Key Features and Benefits

• Strong circuit protection: The thermal‑magnetic trip unit provides dual protection against overloads and short circuits, keeping your electrical system safe and stable.
• Flexible deployment: Rated at 50 A and designed for 3‑pole operation, the breaker handles a wide variety of electrical loads, making it suitable for diverse commercial or industrial environments.
• Space‑saving design: Measuring just 3" wide × 5.4" high × 2.8" deep, this unit fits neatly into standard panelboards — simplifying installation and maximizing usable panel space.
• Durable construction: Built from high-quality materials, the breaker is meant to withstand harsh conditions and deliver dependable performance over many years.

Technical Specifications

• Amperage: 50 A
• Poles: 3‑pole
• Interrupting Ratings:
  • 14 kAIC @ 600Y/347 V
  • 25 kAIC @ 480Y/277 V
• Trip Unit Type: Thermal‑Magnetic
• Wire Range: Accepts 8 – 1/0 AWG (CU or AL)
• Mounting Type: Panelboard Mount
• Dimensions:
  • Width: 3.0 inches
  • Height: 5.4 inches
  • Depth: 2.8 inches
• Weight: 2.615 lbs

Material Compliance and Certifications

• UL Listed (UL 489): Meet or exceed rigorous safety and performance criteria required for circuit breakers.
• RoHS Compliant: Manufactured without hazardous substances, in line with RoHS standards since July 1, 2006.
• WEEE Directive Conformity: Designed with environmentally responsible end-of-life recycling in mind, conforming to relevant electronic waste standards.

Where It Works Best

• The Siemens NGB3B050B is an ideal solution for commercial buildings, factories, and other high-demand environments where dependable circuit protection is vital. Whether you're upgrading an older panelboard or configuring a new electrical installation, this breaker excels at supporting lighting circuits, HVAC systems, machinery, and general-purpose loads. Suppose you need a long-lasting, high-capacity breaker that delivers consistent performance under load. In that case, this unit is a wise choice to keep your electrical system safe and operational day in and day out.