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Siemens EF3B040 - Molded Case Circuit Breaker 40A 600V 3P

Siemens
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Siemens EF3B040 is a molded case circuit breaker designed for providing reliable overcurrent protection in three-phase industrial power distribution systems. It features a 40A continuous current rating and a 600V AC voltage rating, housed within a compact, 8 lb thermal-magnetic unit offering both long-time and instantaneous (LI) trip functions for coordinated protection. This three-pole, bolt-on breaker is constructed for durability and provides an interrupting capacity of 14kA at 480V AC, ensuring compliance with stringent industrial safety and performance standards for applications such as panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-On Connection
  • Voltage Rating: 600V AC
  • Current Rating: 40A
  • Phase: 3
  • Poles: 3
  • AIC Rating: 14kA @ 480V AC
  • Protection Functions: LI (Long-Time and Instantaneous)
  • Trip Type: Thermal Magnetic
  • Connection: Bolt-On
  • Frame: EF Series
  • Weight: 8 lb