Eaton / Cutler-Hammer NB3600P Molded Case Circuit Breaker

This unit mount breaker is specifically designed to fit into legacy Westinghouse Pow-R-Line 4B panelboards and compatible switchboards. It requires the appropriate mounting hardware for these specific enclosures.

Yes. Eaton acquired the Westinghouse distribution equipment business in 1994. Whether your existing breaker is branded as Westinghouse, Cutler-Hammer, or Eaton, the NB3600P catalog number indicates the exact same physical frame and electrical specifications.

This thermal-magnetic breaker features a fixed continuous current rating of 600A, but the instantaneous magnetic trip threshold can be adjusted between 3000A and 6000A. This allows panel builders to fine-tune short-circuit protection and improve selective coordination with downstream devices.

Current limiting breakers are engineered to interrupt severe faults in a fraction of a cycle. By clearing the fault before the current reaches its prospective peak, the breaker drastically reduces the let-through energy, protecting downstream wiring and sensitive equipment from extreme thermal and mechanical damage.

Yes, the standard pressure line and load lugs feature a dual-barrel design. They accept two conductors per pole, accommodating copper or aluminum wire sizes from 1 AWG up to 500 kcmil, which is ideal for parallel feeds in 600A applications.

Yes, this breaker is rated for use in DC circuits up to 250 VDC, where it provides a high interrupting capacity of 100kA. When applying molded case breakers in DC systems, ensure your wiring configuration meets the manufacturer guidelines for DC switching.