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Rectangular grey industrial contactor with terminal screws and coil markings

Eaton

Eaton C25DND330B definite purpose magnetic contactor 208-240V AC 3P

SKU CH-B18C-RS24W

Definite purpose magnetic contactor for 208-240V AC three-phase circuits, rated 30 A inductive and 40 A resistive with 15 hp three-phase motor capacity

  • Controls heavy-duty motors up to 15 hp three-phase
  • 30 A inductive and 40 A resistive full-load ratings
  • 208-240 V AC coil operates on 50/60 Hz supply
  • Non-reversing action maintains constant current direction
  • Auxiliary module capacity of 4 for extra circuit control

Definite Purpose Magnetic Contactor

The Eaton C25DND330B is a non-reversing magnetic contactor built for industrial power control in HVAC, manufacturing and data-processing equipment. It switches heavy-duty loads by responding to electrical impulses, automating machinery operation where reliable on-off control is required.

30 A inductive and 40 A resistive ratings

The contactor handles up to 30 amps full-load inductive current and 40 amps resistive current at its rated voltage. It controls single-phase motors up to 2 hp at 120 V AC and three-phase motors up to 15 hp at 480 V AC, with coil operation across 208-240 V AC at 50/60 Hz.

Four auxiliary contact positions for expanded

The unit provides capacity for four auxiliary contact modules, letting builders add signalling or interlock circuits without extra relays. Its non-reversing action suits applications where current direction stays constant, while the wide coil-voltage range simplifies panel design across 208-240 V supplies.

Highlights

  • Controls heavy-duty motors up to 15 hp three-phase
  • 30 A inductive and 40 A resistive full-load ratings
  • 208-240 V AC coil operates on 50/60 Hz supply
  • Non-reversing action maintains constant current direction
  • Auxiliary module capacity of 4 for extra circuit control

Specifications

BrandEATON

Questions about this item

Will the 208-240 V AC coil work with my existing 240 V control circuit?

Yes, the coil is rated for 208 V to 240 V AC at 50/60 Hz, so a standard 240 V control supply falls within the specified range.

How can I verify the contactor is operating correctly after wiring it?

Apply coil voltage and listen for a clean mechanical pull-in; then measure continuity across the three main power poles — they should show near-zero resistance when energised and open circuit when de-energised.

Does the box include auxiliary contact blocks or must I order them separately?

The unit ships with the base contactor only; the specifications list an auxiliary contact module capacity of 4, meaning up to four auxiliary circuits can be added, but those blocks are sold separately.

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