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Square D Q432300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- I-Line
Square D
Q432300
Molded Case Circuit Breaker
Brand
Square D
SKU
Q432300
Quantity
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Square D Q432300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D Q432300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q432300 |
| Series | Q4 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Frame Type | Q4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Quantity
Square D Q432300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q432300-R |
| Series | Q4 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Frame Type | Q4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Similar Items
250A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Engineered for heavy-duty applications, the Q432300 delivers 300A of thermal-magnetic protection for commercial and industrial facilities. This 3-pole MCCB fits perfectly into Square D I-Line panelboards and switchboards, utilizing a convenient plug-on design. It offers a 25kA interrupting capacity at 240VAC and includes standard long-time and instantaneous (LI) trip functions. When upgrading to current-generation equipment, this model is replaced by the PowerPacT LGA36400U31X.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q432300 |
| Series | Q4 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC |
| Frame Type | Q4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Push-to-Trip |
Product FAQs
5 answersWhat type of panelboards is the Q432300 designed to fit?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features a plug-on line connection that mounts directly to the I-Line bus structure.
What is the magnetic trip range for this 300A circuit breaker?
The Q432300 features an adjustable magnetic trip range from 1500A to 3000A. This allows electricians to fine-tune the short-circuit protection for specific commercial or industrial applications.
What is the modern replacement for the legacy Q432300 circuit breaker?
The Q4 frame is a legacy product. When upgrading to current-generation equipment, this model is typically replaced by the Square D PowerPacT L-frame series, such as the LGA36400U31X, depending on your specific panel and trip unit requirements.
What are the acceptable wire sizes for the load-side lugs on this breaker?
The standard AL400LA load lugs accept one 1 AWG to 600 kcmil aluminum or copper wire, or two 1 AWG to 250 kcmil aluminum or copper wires.
Does this breaker include a push-to-trip feature for mechanical testing?
Yes, it includes a push-to-trip button on the face of the breaker. This allows you to manually trip the mechanism and verify operation without exposing yourself to live electrical parts.
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