Eaton / Cutler-Hammer DA3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer DA3250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to support existing commercial infrastructure, the DA3250 offers robust overcurrent protection within a classic AB De-Ion frame. This three-pole, 250-amp breaker mounts into vintage Westinghouse CDP panelboards and FDP switchboards, providing a reliable maintenance solution. With a 22kAIC interrupting capacity at 240VAC and reverse feed capabilities, it utilizes a fixed thermal-magnetic trip unit to safeguard critical facility circuits.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | DA3250-R |
| Series | DA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse CDP Panelboards, FDP Switchboards, Eaton Panelboards |
| Wire Gauge | 250-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 250 kcmil |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits, Alarm Switch |
|---|---|
| Accessories | Standard Pressure Terminal (TA350DA) |
| Standards | Federal Specification W-C-375b, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
7 answersWhich enclosures are designed to accept the DA3250 breaker?
This legacy D-frame breaker is a direct fit for vintage Westinghouse CDP panelboards and FDP switchboards. It is often used to maintain existing commercial infrastructure without replacing the entire enclosure.
What wire material is compatible with the standard lugs on this breaker?
The factory-installed lugs are dual-rated for both aluminum and copper conductors, accommodating wire sizes from 250 to 500 kcmil. Always apply appropriate joint compound when terminating aluminum wire.
Is the trip unit on the DA3250 adjustable?
No, this breaker features a non-interchangeable, fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory-set and cannot be adjusted in the field.
Can the DA3250 be used in DC power applications?
Yes, in addition to its AC ratings, this breaker is rated for 250VDC systems. It provides up to 10kA interrupting capacity for compatible direct current circuits.
Are Westinghouse and Cutler-Hammer DA3250 breakers the same?
Yes. Eaton acquired the Westinghouse distribution equipment business and continued manufacturing the AB De-Ion DA frame under the Cutler-Hammer and Eaton brands. A DA3250 from any of these brands is physically and electrically identical.
Does the DA3250 require special mounting hardware for installation?
As a bolt-on breaker, it secures directly to the panelboard bus. Ensure you have the correct bus connection hardware specific to your Westinghouse CDP or FDP switchboard, as standard hardware may not fit vintage busbars.
Is the DA3250 suitable for reverse feed applications?
Yes, this thermal-magnetic breaker supports reverse feed configurations. Always verify local electrical codes and panelboard labeling before installing the breaker in a reverse feed setup.
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