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Eaton / Cutler-Hammer LD3350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
LD3350
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
LD3350
Quantity
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Eaton / Cutler-Hammer LD3350 - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer LD3350 - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LD3350 |
| Series | LD |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | LD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| 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, Alarm Switch, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
Quantity
Eaton / Cutler-Hammer LD3350 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LD3350 |
| Series | LD |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | LD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| 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, Alarm Switch, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
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500A 3 Pole Molded Case Circuit Breaker
Description
Built for heavy-duty power distribution, the Eaton LD3350 is a 3-pole, 350A molded case circuit breaker utilizing standard thermal-magnetic trip technology. It delivers reliable long-time and instantaneous (LI) protection for commercial facilities. Designed as a unit mount L-Frame breaker, it fits into Eaton Series C panelboards and switchboards. The breaker includes standard lugs accommodating dual 3/0 AWG to 350 kcmil wiring. With a 65kAIC rating at 240VAC, this device is HACR rated.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | LD3350 |
| Series | LD |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | LD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | (2) 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| 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, Alarm Switch, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit |
Product FAQs
7 answersWhat equipment is compatible with the Eaton LD3350?
The LD3350 is an L-Frame circuit breaker designed for installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers.
What is the difference between Eaton LD, HLD, and LDC circuit breakers?
The difference lies in their short-circuit interrupting ratings. The standard LD frame, such as the LD3350, is rated for 35kAIC at 480VAC. The HLD frame offers a higher rating of 65kAIC at 480VAC, while the LDC frame provides 100kAIC at 480VAC.
Is the Eaton LD3350 circuit breaker 100% rated?
No, the LD3350 is a standard 80% rated circuit breaker. For applications requiring a 100% continuous current rating, a CLD-frame breaker is required.
Can the Eaton LD3350 be reverse fed?
Yes, standard thermal-magnetic Series C circuit breakers like the LD3350 are suitable for reverse feed applications.
Are the trip settings on the LD3350 adjustable?
No, the LD3350 features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip functions are factory-set and cannot be adjusted in the field.
What wire sizes are supported by the standard lugs on the LD3350?
The standard feed-thru lugs on the LD3350 accept two 3/0 AWG to 350 kcmil aluminum or copper (Al/Cu) conductors per pole.
Can the Eaton LD3350 replace older Cutler-Hammer or Westinghouse breakers?
Yes, the Eaton LD3350 is a direct replacement for older Cutler-Hammer and Westinghouse Series C LD3350 circuit breakers. They share the same physical L-Frame dimensions and mounting hardware.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
1 review
- MBMike B.Verified BuyerReviewingEaton / Cutler-Hammer LD3500 - 500A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/13/26Superbreakers Delivered
Had an issue where we needed a large molded case breaker ASAP as a large customer was down without power. James with superbreakers absolutely delivered, he found what was needed and got it to us the very next day. Fantastic customer service and business.