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Eaton 666A347H07 - Circuit Breaker 40A 347VAC Single Pole

Cutler Hammer
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Eaton 666A347H07 is a single pole molded case circuit breaker from the DS Series, designed for overload and short-circuit protection in commercial and industrial power distribution systems. It is rated for 40A continuous current and a maximum voltage of 347VAC, with a thermal-magnetic trip unit providing reliable protection against overloads and short circuits. This compact breaker weighs 0.5 lb and is constructed for panelboard or switchboard mounting, categorized under the Hardware section. It complies with UL, CSA, CE, IEC, and KEMA KEUR certifications, ensuring adherence to global safety and performance standards. Typical applications include use in panelboards and switchboards within modern electrical installations requiring space-saving and durable protection.

Key Features & Specifications
  • Manufacturer: Eaton
  • Part Number: 666A347H07
  • Series: DS Series
  • Type: DS/DSL
  • Item Subcategory: Primary Current Part
  • Section: Hardware (springs, bolts, etc.)
  • Weight: 0.5 lb
  • Amperage: 40A
  • Voltage: 347VAC maximum
  • Poles: Single Pole
  • Mounting Type: Panelboard/Switchboard
  • Interrupt Rating: 35kA @ 120VAC, 25kA @ 240VAC, 18kA @ 347VAC
  • Trip Unit: Thermal-Magnetic
  • Certifications: UL, CSA, CE, IEC, KEMA KEUR