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Square D D3 Series General Duty Three Phase Fused Disconnects 30 A NEMA 1 240 VAC

Mfg #: D321N
BOR #: 156333
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Up to 100 kA short circuit current rating with proper current limiting fusing.

  • Designed for residential and commercial applications where economy is a prime consideration
  • General duty safety switches are UL Listed, File E2875, and meet or exceed the NEMA Standard KS1
  • They are suitable for use as service equipment when equipped with a factory-installed neutral assembly or a field-installed service grounding kit
  • Typical loads are lighting, air conditioning, and appliances
  • 4-wire: 3 blades and fuseholders, 1 neutral
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Product can be ordered only in multiples of
Brand Square D  
Number of Phases 3 phase  
NEMA Rating NEMA 1  
Voltage 240 VAC  
Wire Size (1) 14 - 6 AWG  
Enclosure Type N1 Enclosure  
Includes Solid neutral  
Number of Poles 3  
Amperage 30 A  
Disconnect Type Fused  
Material Steel  
Square D Specification Sheet Specification Sheet
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