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Siemens E21B040 - Molded Case Breaker 40A 120V 1-Pole

Siemens
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Siemens E21B040 is a 1-pole molded case circuit breaker from the E Series, designed for overcurrent protection in industrial and commercial power distribution systems. It operates at 120V AC with a 40A continuous current rating and a 10kA interrupting capacity at 120V, utilizing a thermal magnetic trip mechanism for long-time and instantaneous protection. The unit features a bolt-on connection, weighs 4 lb, and is constructed for single-phase applications. It complies with industry standards for molded case circuit breakers. This breaker is typically used in panelboards, lighting panels, and load centers requiring reliable branch circuit protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, E Series, Thermal Magnetic
  • Voltage Rating: 120V AC
  • Current Rating: 40A
  • Poles: 1
  • Connection: Bolt-On
  • Protection: LI - Long-Time and Instantaneous
  • AIC Rating: 10kA@120V
  • Phase: 1
  • Weight: 4 lb
  • Functions: LI - Long-Time and Instantaneous


Product Identification