Eaton
Eaton C25DNF340T Definite Purpose Magnetic Contactor, 24V AC, 3 Pole, 40A
Controls power flow in heavy-duty industrial applications with a 24V AC coil, three poles, 40A inductive and 50A resistive ratings, and 50/60 Hz operation
- Controls inductive loads up to 40A for motor applications
- Handles resistive loads up to 50A for heating circuits
- 24V AC coil voltage suits standard control systems
- Operates at 50/60 Hz for broad power compatibility
- Auxiliary capacity of 4 supports expanded control flexibility
Definite Purpose Magnetic Contactor
The Eaton C25DNF340T is a definite purpose magnetic contactor built for heavy-duty industrial power control. It uses a 24V AC coil to switch three-phase circuits in applications such as HVAC, data processing and manufacturing. The non-reversing action maintains a constant current flow direction for straightforward load management.
Upgrading from lower-rated contactors
This unit replaces contactors that cannot handle 40 A inductive or 50 A resistive full-load current at 50/60 Hz. The jump is worth it when machinery demands higher continuous current capacity or when an auxiliary contact module capacity of four is needed for additional control circuits. It is not for systems requiring reversing operation or coil voltages other than 24V AC.
Panel-mount installation and wiring checks
The 3.75 in depth fits standard enclosures, and the 24V AC coil connects directly to compatible control circuits. Verify that the supply frequency matches 50/60 Hz and that the load type aligns with the inductive or resistive ratings. Incorrect coil voltage or exceeding the 40 A inductive limit are the most common wiring errors.
Highlights
- Controls inductive loads up to 40A for motor applications
- Handles resistive loads up to 50A for heating circuits
- 24V AC coil voltage suits standard control systems
- Operates at 50/60 Hz for broad power compatibility
- Auxiliary capacity of 4 supports expanded control flexibility
Specifications
| Brand | EATON |
|---|
Questions about this item
What depth clearance does the 3.75 in contactor require inside the enclosure?
The unit extends 3.75 in into the mounting surface, so allow at least that depth plus wiring space behind the panel.
How do I wire the 24V AC coil correctly, and what mistake should I avoid?
Connect the control circuit to the coil terminals rated for 24V AC at 50/60 Hz; do not apply a DC or higher-voltage signal or the contactor will not operate.
When should I plan to replace the main power contacts on this 40 A inductive-rated unit?
Replace the contactor when the main contacts show pitting or the inductive load rating of 40 A can no longer be carried reliably.
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