Square D Q4L2400 Molded Case Circuit Breaker
- 400A
- 2 Pole
- Unit Mount
Quantity
Square D Q4L2400 - 400A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D Q4L2400 - 400A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q4L2400 |
| Series | Q4L |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 120VAC, 25kA @ 240VAC |
| Frame Type | Q4L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Enclosures |
| Wire Gauge | (1) 1 AWG-600 kcmil (Al/Cu) or (2) 1 AWG-250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Line and Load Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B/GEN, IEC 60947-2, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Quantity
Square D Q4L2400 - 400A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | Q4L |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 120VAC, 25kA @ 240VAC |
| Frame Type | Q4L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Enclosures |
| Wire Gauge | (1) 1 AWG-600 kcmil (Al/Cu) or (2) 1 AWG-250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Line and Load Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B/GEN, IEC 60947-2, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Description
Delivering reliable thermal-magnetic trip functions, this Q-Frame unit mount MCCB is built for heavy-duty commercial environments. It provides long-time and instantaneous (LI) protection for critical electrical systems. This 2-pole breaker installs into Square D switchboards and motor control centers. As a legacy unit, it is replaced by the PowerPacT LDL36400U31X. It features a 25kAIC interrupt rating at 240VAC and offers a push-to-trip mechanism.Specifications
| Brand | Square D |
|---|---|
| Series | Q4L |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 25kA @ 120VAC, 25kA @ 240VAC |
| Frame Type | Q4L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Enclosures |
| Wire Gauge | (1) 1 AWG-600 kcmil (Al/Cu) or (2) 1 AWG-250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Line and Load Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B/GEN, IEC 60947-2, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Product FAQs
8 answersWhat is the recommended tightening torque for the lugs on the Q4L2400?
The factory lugs require a tightening torque of 371.7 lb-in (42 N.m) for both the single wire (1 AWG to 600 kcmil) and dual wire (1 AWG to 250 kcmil) configurations.
Can the Q4L2400 accommodate dual conductors per phase?
Yes, the standard lugs can accept either a single conductor from 1 AWG to 600 kcmil or two conductors from 1 AWG to 250 kcmil. Both aluminum and copper wires are supported.
What are the magnetic hold and trip currents for this 400A breaker?
The Q4L2400 has a magnetic hold current of 2000A and a magnetic tripping current of 4000A. These fixed thresholds dictate the instantaneous short circuit response.
Are the thermal and magnetic trip settings adjustable on the Q4L2400?
No, this breaker features a fixed thermal and fixed magnetic trip unit. It provides long-time and instantaneous protection with factory set parameters.
Which external operating mechanism is compatible with the Q4L2400 breaker?
The Square D 9421LL1 operating mechanism is designed for 400A frames, including the Q4L, LAL, and LHL series. This allows for safe external actuation from outside the enclosure.
What types of equipment can the Q4L2400 be installed in?
This unit mount breaker is designed for use in Square D switchboards, motor control centers, and industrial enclosures that accept Q4 or LA frame circuit breakers.
What is the difference between the Square D Q4L and LA frame breakers?
Both share the same physical dimensions and mounting footprint, but the Q4L series is rated for a maximum of 240VAC, whereas the LA series is rated for up to 600VAC.
Does the Q4L2400 include a push-to-trip feature?
Yes, it includes a push-to-trip button on the face of the breaker. This allows electricians to manually trip the mechanism to verify mechanical operation and ensure safety before maintenance.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- BWBobby W.ReviewingSquare D Q4L3300 - 300A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/23/18BREAKER
VERY SATISFIED WITH ORDER