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Siemens NGB1B040B - Molded Case Circuit Breaker 40A 1P (25kA AIC)

Siemens
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Siemens NGB1B040B is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in single-phase industrial and commercial electrical systems. It features a 40A continuous current rating and a 347V AC voltage rating, housed within a compact GG frame with a durable bolt-on connection for secure installation. This thermal magnetic breaker provides both long-time and instantaneous (LI) trip functions, is rated for an interrupting capacity of 25kA at 277V, and operates reliably within a temperature range of -25°C to +70°C (-13°F to 158°F). Constructed to meet rigorous industry standards, it carries UL and IEC certifications for safety and performance, making it suitable for panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 347V AC
  • Current Rating: 40A
  • Frame Size: GG Frame
  • Poles: 1
  • Phase: 1
  • AIC Rating: 25kA @ 277V
  • Protection Functions: LI (Long-Time and Instantaneous Trip)
  • Trip Type: Thermal Magnetic
  • Connection: Bolt-On
  • Operating Temperature: -25°C to +70°C (-13°F to 158°F)
  • Certification: UL, IEC
  • Family: VL Series
  • Weight: 0.88 lb


Product Identification
  • UPC: 783643414006
  • GTIN: 00783643414006