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Square D NA11143 - Under Voltage Release 24V AC

Square D
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Square D NA11143 is an under voltage release accessory designed to trip a circuit breaker when the control voltage drops below a set threshold, enhancing protection and operational safety. It operates with a control voltage rating of 24V AC, serving as both the minimum and maximum operating voltage. This unit weighs 2 lb and is compatible with Square D PowerPact circuit breaker frames, including NA, NAF, NAL, NAP, NC, NCF, NCL, NCP, NE, NEF, NEL, NEP, NX, NXF, NXL, and NXP types. It is certified to UL 1066, UL 489, and ANSI C37 standards for repair and recondition applications. Typical applications include industrial power distribution systems requiring undervoltage protection for molded case circuit breakers.

Key Features & Specifications
  • Type: Under Voltage Release
  • Control Voltage Rating: 24V AC
  • Weight: 2 lb
  • Compatible Frames: NA, NAF, NAL, NAP, NC, NCF, NCL, NCP, NE, NEF, NEL, NEP, NX, NXF, NXL, NXP
  • Certifications: UL 1066, UL 489, ANSI C37
  • Mounting Type: Accessory for molded case breakers


Part Number: NA11143