Square D Q4L3250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
Square D Q4L3250 - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D Q4L3250 - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q4L3250 |
| Series | Q4L |
| Amperage | 250A |
| 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 |
|---|---|
| Accessories | 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, Non-Interchangeable Trip |
Quantity
Square D Q4L3250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q4L3250-R |
| Series | Q4L |
| Amperage | 250A |
| 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 |
|---|---|
| Accessories | 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, Non-Interchangeable Trip |
Description
Engineered for commercial power distribution, the Square D Q4L3250 provides reliable overcurrent protection. This 250A, 3-pole molded case circuit breaker features a thermal-magnetic trip unit with fixed LI functions. It installs into Square D switchboards and industrial enclosures via unit mount lugs. As a legacy Q-Frame device, it replaces older units and is superseded by the PowerPacT L-Frame (LDL36250U31X). Rated for 25kAIC at 240VAC, it includes a push-to-trip mechanism.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q4L3250 |
| Series | Q4L |
| Amperage | 250A |
| 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 |
|---|---|
| Accessories | 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, Non-Interchangeable Trip |
Product FAQs
7 answersWhat equipment is the Q4L3250 designed to be installed in?
This unit mount breaker is compatible with Square D switchboards, motor control centers, and industrial enclosures.
What are the wire gauge requirements for the Q4L3250 lugs?
The included lugs accept either a single 1 AWG to 600 kcmil wire or two 1 AWG to 250 kcmil wires. Both aluminum and copper conductors are supported.
What are the modern replacements for the legacy Q4L3250?
As a legacy Q-Frame device, it is commonly superseded by the PowerPacT L-Frame series, such as the LDL36250U31X, or the QDL32250 depending on the specific enclosure and mounting requirements.
How can I manually test the mechanical operation of the Q4L3250?
The breaker features a built-in push-to-trip button, allowing you to manually trip the mechanism and verify operation without exposure to live electrical parts.
How does the thermal-magnetic trip unit on the Q4L3250 operate?
The breaker uses a fixed thermal element for long-time overload protection and a fixed magnetic element for instantaneous short-circuit protection, commonly referred to as an LI trip function.
Is the Q4L3250 an I-Line or unit mount breaker?
This is a feed-thru, unit mount circuit breaker. It requires bolted connections and is not compatible with I-Line plug-on bus systems.
What is the maximum interrupting capacity of this breaker?
The Q4L3250 provides a standard interrupting rating of 25kAIC at its maximum rated voltage of 240VAC.
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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