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Square D SFA1040A - Molded Case 40A 240V 1-Pole

Square D
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Square D SFA1040A is a 1-pole molded case circuit breaker from the I-Line family, designed for thermal-magnetic protection with long-time and instantaneous trip functions. It is rated for 40A at 240V AC with a 25kA interrupting capacity at 240V, supporting single-phase systems. The unit weighs 3 lb and features an I-Line style plug-in connection, operating within a temperature range of -13 to 158 °F (-25 to 70 °C). This breaker complies with industry standards for industrial applications requiring reliable overcurrent protection. Typical uses include branch circuit protection in panelboards and switchboards within commercial and industrial settings.

Key Features & Specifications
  • Type: Molded Case, I-Line Family, SFA Type
  • Voltage Rating: 240V AC
  • Current Rating: 40A
  • Poles: 1
  • Connection: I-Line Style Plug-In
  • Protection: Thermal Magnetic (LI - Long-Time and Instantaneous Trip)
  • AIC Rating: 25kA@240V
  • Phase: 1
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Weight: 3 lb
  • Functions: LI - Long-Time and Instantaneous Trip