Eaton / Westinghouse LD3400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Eaton / Westinghouse LD3400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Westinghouse LD3400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LD3400 |
| Series | LD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 4 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 |
|---|---|
| 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 |
Quantity
Eaton / Westinghouse LD3400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LD3400-R |
| Series | LD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 4 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 |
|---|---|
| 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 |
Description
Designed for heavy-duty industrial environments, this 400A Series C unit-mount breaker provides reliable long-time and instantaneous protection. It serves as an exact cross-reference for older LA3400 models, fitting perfectly into Pow-R-Line 4 panelboards and motor control centers without modifications. The HACR-rated and reverse-feed capable design ensures versatile application across commercial switchboards while maintaining a 65kAIC rating at 240VAC.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | LD3400 |
| Series | LD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Pow-R-Line 4 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 |
|---|---|
| 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 |
Product FAQs
6 answersWhat types of panelboards are compatible with the LD3400 circuit breaker?
This Series C L-frame breaker is designed for use in Eaton and Cutler-Hammer Pow-R-Line 4 panelboards, switchboards, and motor control centers. It is designed for unit mounting configurations.
What are the wire size requirements for the standard lugs on the LD3400?
The standard factory-installed line and load terminals on this breaker accept two conductors per phase. The lugs are rated for aluminum or copper wire, accommodating sizes from 3/0 AWG up to 350 kcmil.
Is the Eaton LD3400 a direct replacement for older Westinghouse or Cutler-Hammer LD3400 units?
Yes. Eaton acquired the Westinghouse electrical distribution division and integrated it under the Cutler-Hammer name before transitioning to the Eaton brand. An LD3400 stamped with Westinghouse, Cutler-Hammer, or Eaton will be physically and electrically identical.
Does the LD3400 feature adjustable trip settings?
No, this specific model features a fixed thermal and fixed magnetic trip unit. If you require adjustable settings or electronic trip functions, you will need a different breaker configuration within the Series C L-frame family.
Is the LD3400 rated for direct current (DC) applications?
Yes, this thermal magnetic breaker carries a UL rating for 250 VDC applications with an interrupting capacity of 22 kA. It is suitable for DC systems within these voltage and fault current limits.
How is the LD3400 breaker mounted in a panelboard?
This is a unit mount circuit breaker. It bolts directly to the chassis or mounting pan of compatible switchboards and Pow-R-Line 4 panelboards, requiring hardwired line and load connections rather than plugging directly onto a bus.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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.