Eaton / Cutler-Hammer PDG33M0125TFAJ Molded Case Circuit Breaker

The 125A rating is the breaker's rated current, not its short-circuit interrupting capacity. Select it using the circuit's load requirements, conductor ampacity and applicable electrical code requirements.

The rated voltages are 240VAC, 480VAC, 600VAC and 250VDC. Match the circuit voltage and AC or DC service to the appropriate rating; voltage rating and interrupting capacity are separate selection checks.

At 480VAC, the breaker has a 65kA interrupting rating. The available fault current at the installation point must not exceed that rating.

This breaker has 3 poles for 3-phase service. Its poles operate together to interrupt the phase conductors, so select it when the circuit requires coordinated interruption of all three phases.

The thermal trip is fixed, and the magnetic trip is adjustable. Use the magnetic adjustment to select the instantaneous pickup threshold as part of the circuit's protection coordination; the thermal overload setting remains fixed.

The breaker has standard lugs on both the line and load sides. Terminate incoming conductors at the line-side lugs and outgoing circuit conductors at the load-side lugs.

The breaker is 10.12 in high, 5.47 in wide and 4.29 in deep. Use these dimensions to plan its physical space, while accounting separately for conductor routing and termination access.

The thermal element responds to sustained overloads, while the magnetic element responds rapidly to short-circuit currents. This trip type combines overload and short-circuit protection for the circuit.