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Siemens EF3A040 - Molded Case 40A 3-Pole Breaker (600V)

Siemens
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Siemens EF3A040 EF Series 40A 3-Pole Molded Case Circuit Breaker - Magnetic Only Protection 600V The Siemens EF3A040 is a 3-pole molded case circuit breaker from the EF Series, designed for instantaneous magnetic-only protection in industrial power distribution systems. Rated for 600V AC and 40A continuous current, this bolt-on unit provides an interrupting capacity of 14kA at 480V, making it suitable for high-fault applications. Weighing 8 lb, it features a compact molded case construction with bolt-on connection for secure panel mounting. This breaker complies with industry standards for overcurrent protection and is ideal for motor control centers, panelboards, and switchboards requiring instantaneous trip response. Its magnetic-only protection ensures rapid disconnection during short-circuit events without thermal delay, making it appropriate for circuits with high inrush currents or where thermal protection is handled separately.

Key Features & Specifications
  • Type: Molded Case, EF Series, Magnetic Only
  • Voltage Rating: 600V AC
  • Current Rating: 40A
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Magnetic Only (Instantaneous)
  • AIC Rating: 14kA@480V
  • Phase: 3
  • Functions: I - Instantaneous
  • Weight: 8 lb
  • Family: EF Series
  • Item Subcategory: Molded Case


Product Identification
  • UPC: Not available
  • GTIN: Not available