The Cutler-Hammer / Eaton Quicklag BAB2040 is a commercial-grade, industrial-type miniature circuit breaker designed for robust overcurrent and short-circuit protection. Engineered for secure installation into compatible commercial and residential panelboards (such as Eaton Pow-R-Line, Westinghouse, and Bryant systems), this bolt-on unit utilizes a reliable thermal-magnetic tripping system. 
Technical Specifications Summary
Attribute / SpecificationValue / DetailSource Reference
ManufacturerEaton (Formerly Cutler-Hammer / Westinghouse)
Catalog NumberBAB2040
UPC Code786679302408
Circuit Breaker TypeType BAB Molded Case (Quicklag Industrial)
Number of Poles2-Pole (Single Phase)
Amperage Rating40 Amps
Voltage Rating120/240 V AC
Interrupt Rating10 kAIC (10,000 Amperes Interrupting Capacity @ 240V)
Trip Unit TypeFixed Thermal-Magnetic, Non-Interchangeable
Mounting MethodType B / Bolt-On
Wire Gauge Range#14 to #4 AWG (Copper/Aluminum compatible)
Terminal TypesExtended Tang Line / Steel Box Load Lug
Standards & ComplianceUL 489 Listed, CSA Certified, HACR Rated, W-C-375b Fed Spec
Physical Dimensions and Weight
  • Overall Depth / Length: 3.1 inches (approx. 7.9 cm)
  • Overall Height: 2.9 inches (approx. 7.4 cm)
  • Overall Width: 2.0 inches (approx. 5.1 cm)
  • Unit Weight: 0.6 lbs (approx. 0.27 kg) 
Operational & Application Features
  • HACR Rated: Certified for use with Heating, Air Conditioning, and Refrigeration equipment involving group motor applications. 
  • Switching Duty (SWD): Rated for 120 VAC fluorescent lighting applications, allowing the breaker to safely be used as an intentional switch for light banks. 
  • Dual-Response Tripping: Employs a Long-Time thermal trip mechanism for persistent, low-level overloads, alongside an Instantaneous magnetic trip function for immediate reaction to dangerous short circuits.
  • Environmental Resilience: Calibrated for a 40°C ambient operating temperature and suitable for operations in relative humidity up to 95% noncondensing. 

Warranty:

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 Condition:

     * Surplus open pre-owned; may show some cosmetic wear or scratches, but it is fully operational and functions as intended.

     *See the listing pictures for full details and a description of any imperfections.

    * Out of its original package.

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