Eaton / Cutler-Hammer DA3350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer DA3350 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for aging electrical systems, the Eaton DA3350 provides 350A of thermal-magnetic protection. This 3-pole molded case circuit breaker features a non-interchangeable trip unit and standard lug terminals for secure connections. Designed for commercial and industrial applications, it installs into classic Westinghouse CDP panelboards, FDP switchboards, and compatible Eaton enclosures. It serves as the predecessor to the DK3350 series.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | DA3350-R |
| Series | DA |
| Amperage | 350A |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Lug Kits |
|---|---|
| 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 |
Product FAQs
6 answersIs the DA3350 still in active production?
No, the DA3350 is an obsolete legacy D-Frame circuit breaker. For modernizing aging electrical systems, panel builders often cross-reference this unit to the newer DK3350 replacement.
Which panelboards are designed to accept the DA3350?
This bolt-on breaker mounts securely into vintage Westinghouse CDP panelboards, FDP switchboards, and compatible Eaton enclosures.
What wire sizes do the standard lugs on the DA3350 accept?
The standard pressure terminals accept aluminum or copper conductors ranging from 250 to 500 kcmil. When terminating aluminum wire, the use of joint compound is required by the manufacturer.
Can the DA3350 be used in reverse-feed applications?
Yes, this thermal-magnetic circuit breaker is suitable for reverse-feed installations.
Is the trip unit on the DA3350 interchangeable?
No, the DA3350 features a non-interchangeable thermal-magnetic trip unit. It provides a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
What is required when upgrading from a DA3350 to a newer Series C K-Frame breaker?
If you are upgrading this legacy DA breaker to a newer Series C K-Frame in a panelboard application, you must also order a TAD3 spacer kit for proper fitment.
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