Square D Q4L3300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
Square D Q4L3300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D Q4L3300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q4L3300 |
| Series | Q4L |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 3 |
| 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 Q4L3300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q4L3300-R |
| Series | Q4L |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 3 |
| 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
Designed to handle substantial loads, the Square D Q4L3300 is a 300A, 3-pole molded case circuit breaker. It employs a thermal-magnetic trip mechanism with fixed LI functions to protect commercial electrical systems. This legacy Q-Frame breaker utilizes a unit mount design with lug terminals for Square D switchboards. It serves as a replacement for existing installations and is officially replaced by the PowerPacT LDL36300U31X. It offers a 25kAIC rating at 240V and push-to-trip functionality.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q4L3300-R |
| Series | Q4L |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC |
| Phase | 3 |
| 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
6 answersWhat type of equipment is the Square D Q4L3300 designed to fit?
This legacy Q-Frame breaker is designed for installation in Square D switchboards, motor control centers, and industrial enclosures.
What wire sizes do the standard lugs on the Q4L3300 accept?
The included lugs accommodate either a single 1 AWG to 600 kcmil wire or two 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported.
How is the Q4L3300 circuit breaker mounted?
This is a unit-mount, feed-thru circuit breaker. It bolts directly to the backpan or mounting plate of the enclosure and uses lug connections on both the line and load sides, rather than plugging into a busbar.
Are the trip settings on the Q4L3300 adjustable?
No. It utilizes a thermal-magnetic trip unit with fixed long-time and fixed instantaneous (LI) trip functions.
Does the Q4L3300 include a manual testing feature?
Yes, it features a push-to-trip button on the faceplate. This allows electricians to manually trip the breaker and verify the mechanical linkage is operating correctly without exposing live parts.
What is the modern replacement for the legacy Q4L3300 breaker?
While the Q4L3300 is still used to maintain existing systems, Square D officially replaces this legacy Q-Frame model with the PowerPacT L-Frame series, specifically the LDL36300U31X, for new installations and panel modernizations.
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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