NEB2B050B - 50 Amp Circuit Breaker

NEB2B050B - 50 Amp Circuit Breaker

The Siemens NEB2B050B delivers dependable overcurrent protection for low‑voltage panelboards in demanding commercial and industrial environments. This two‑pole, 50-amp breaker is engineered to safeguard your electrical system by automatically cutting off power when overloads or short circuits occur. With its thermal‑magnetic trip mechanism and substantial interrupting capacity, it’s a wise choice for contractors, facility managers, and electricians who need solid performance without complications.

Key Features and Benefits

• Thermal-Magnetic Trip Unit: Combines thermal sensing and magnetic response to shut off power quickly and accurately under both overload and short‑circuit conditions, protecting wiring and connected equipment.
• High Interrupting Capacity: Rated at 22 kAIC when used at 600Y/347 V and 35 kAIC at 480 V — built to handle high-fault conditions without compromising safety.
• Secure Load Connections: Includes load‑side lugs (TA1EG10) capable of accommodating 8–1/0 AWG copper or aluminum conductors, ensuring a strong and reliable connection to downstream wiring.
• Panelboard Mount Ready: Intended for standard low‑voltage panelboard installations, making it easy to integrate into existing electrical distribution systems.

Technical Specifications

• Amperage Rating: 50 A
• Voltage Rating: 600Y/347 V and 480 V
• Interrupting Rating:
  • 22 kAIC at 600Y/347 V
  • 35 kAIC at 480 V
• Trip Type: Thermal-Magnetic
• Frame Type: EG frame
• Poles: 2‑pole
• Wire Range (Load Side Lugs): 8 – 1/0 AWG, Copper or Aluminum
• Mounting Style: Panelboard / Load Center Mount
• Dimensions:
  • Width: 2″
  • Height: 5.5″
  • Depth: 3″
• Weight: Approximately 1.96 lbs (0.89 kg)

Material Compliance and Certifications

• UL Listing: This Siemens NEB2B050B breaker is UL‑listed, indicating it meets rigorous safety and performance standards for electrical protection devices.
• Construction: It is constructed from industrial‑grade materials designed for long-term durability and safe operation.
• Environmental Compliance: It complies with appropriate environmental disposal regulations, reflecting a commitment to responsible manufacturing and end-of-life handling practices.

Where It Works Best

• This breaker is ideal for low-voltage panelboards in commercial buildings, light industrial facilities, retail centers, and similar settings. It excels in applications such as distribution panels, branch circuits, and sub‑feeders where reliable overload and fault protection is essential. If you need a dependable 50-amp circuit breaker that balances performance, safety, and ease of installation, the NEB2B050B is a practical choice for a wide variety of electrical systems.