Eaton/Cutler-Hammer FD3040L 3 Pole Circuit Breaker
The Eaton/Cutler-Hammer FD3040L is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 40 Amps and a voltage rating of 600VAC, 250VDC. It has an interrupting rating of 35kAIC at 480VAC, 65kAIC at 240VAC. The FD3040L has a feed-thru connection type and includes long time and instantaneous trip functions.
What does the "L" in the FD3040L catalog number indicate?
The "L" indicates that the circuit breaker comes factory-supplied with both line and load side lugs.
Can the Eaton FD3040L be reverse fed?
Yes, Eaton Series C F-frame thermal-magnetic circuit breakers are suitable for reverse feed applications.
What equipment is the FD3040L circuit breaker designed to fit?
This F-frame breaker is designed for use in Eaton Series C panelboards, switchboards, and enclosures.
What wire sizes are accepted by the standard lugs on the FD3040L?
The standard factory-installed lugs accept copper or aluminum wire ranging from 14 AWG to 1/0 AWG.
Where can I find the correct lug torque specifications for the FD3040L?
The required torque values for the line and load terminals are printed directly on the circuit breaker nameplate. Always use a calibrated torque wrench to ensure proper connections.
Is the FD3040L rated for use in DC circuits?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for up to 250VDC with an interrupting capacity of 10kAIC.
Can the Eaton FD3040L replace older Cutler-Hammer or Westinghouse breakers with the same part number?
Yes, Eaton acquired the Cutler-Hammer and Westinghouse distribution equipment lines. The FD3040L is a direct replacement for legacy Cutler-Hammer and Westinghouse breakers sharing the same catalog number.
Are the trip settings on the FD3040L adjustable?
No, this breaker features a fixed thermal and fixed magnetic trip unit. It provides long-time and instantaneous protection, but the trip points cannot be adjusted in the field.
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