Square D DJA34400E58 Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Quantity
Square D DJA34400E58 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for heavy-duty applications, the Square D DJA34400E58 is a 3-pole, 400A MCCB from the PowerPacT D-Frame series. This unit features an I-Line plug-on connection designed for Square D I-Line panelboards. It accepts 2 AWG to 600 kcmil wire and comes equipped with load-side lugs. The breaker includes advanced electronic trip technology with adjustable LSI functions, plus a built-in ammeter and fault indicator for enhanced system monitoring.Specifications
| Brand | Square D |
|---|---|
| Part Number | DJA34400E58 |
| Series | DJA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 2 AWG-600 kcmil (Cu/Al) |
| Max Wire | 600 kcmil |
| Min Wire | 2 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Ammeter (Integrated), Fault Indicator (Integrated) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, True RMS Sensing, Ammeter, Fault Indicator |
Product FAQs
5 answersWhat type of panelboard accepts the DJA34400E58 breaker?
This breaker is designed specifically for Square D I-Line panelboards and switchboards. It features a plug-in mounting style that connects directly to the internal bus stack, making installation faster than traditional unit-mount breakers.
What does the LSI designation mean for this electronic trip breaker?
LSI stands for Long-Time, Short-Time, and Instantaneous trip functions. These adjustable settings on the electronic trip unit allow panel builders to precisely shape the trip curve, improving selective coordination with other breakers in the electrical system.
Are the lugs on this 400A breaker rated for aluminum wire?
Yes, the standard terminal lugs are dual-rated for both copper and aluminum (Cu/Al) conductors. They accept wire gauges ranging from 2 AWG up to 600 kcmil.
Can this D-frame breaker be used on a 600V system?
Yes, while it is commonly used at 480V with a 65kA interrupting rating, it is fully rated for up to 600VAC applications, where it provides a 25kA interrupting capacity.
What are the safety benefits of the electronic trip unit on this breaker?
The solid-state electronic trip unit provides highly accurate and repeatable trip responses compared to traditional thermal-magnetic designs. By allowing precise adjustments to the Long-Time, Short-Time, and Instantaneous settings, it enhances system safety and ensures the breaker trips exactly when required to protect downstream equipment.
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