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Square D LI36600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- I-Line
Square D
LI36600
Molded Case Circuit Breaker
Brand
Square D
SKU
LI36600
Quantity
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Square D LI36600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Square D LI36600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LI36600 |
| Series | LI |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | LI |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 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 | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated |
| Special Features | Current Limiting |
Quantity
Square D LI36600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LI36600-R |
| Series | LI |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | LI |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 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 | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated |
| Special Features | Current Limiting |
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Description
Part of the legacy L-Frame series, this 600A current-limiting MCCB delivers robust protection for commercial and industrial systems. It features thermal-magnetic trip technology with adjustable instantaneous settings. Designed for Square D I-Line panelboards, it utilizes a plug-on connection for rapid installation. For modern upgrades, this breaker is replaced by the LRA36600U31X model.Specifications
| Brand | Square D |
|---|---|
| Part Number | LI36600-R |
| Series | LI |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | LI |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | (2) 4/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 4/0 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 | Lugs |
| Standards | CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated |
| Special Features | Current Limiting |
Product FAQs
6 answersWhat panelboards are compatible with the LI36600 circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. The I-Line plug-in mounting style allows the breaker to snap directly onto the busbar system, making installation faster than traditional bolt-on configurations.
What size wire can be used with the lugs on the LI36600?
The standard factory lugs accept two conductors per phase, ranging from 4/0 AWG to 500 kcmil. They are rated for both aluminum and copper wire. Always apply the correct torque specifications as outlined on the breaker faceplate during installation.
What does the LI trip function indicate on this 600A breaker?
The LI designation means the thermal-magnetic trip unit includes Long-Time (L) and Instantaneous (I) protection. The thermal element provides fixed overload protection, while the magnetic element offers adjustable short-circuit protection to help coordinate with other devices in your electrical system.
Is the Square D LI36600 considered a current-limiting breaker?
Yes, this model is a current-limiting circuit breaker. It is engineered to clear high-level fault currents extremely fast, reducing the let-through energy and protecting downstream equipment from severe electrical and mechanical stress.
Is the LI36600 part of a legacy product line?
Yes, the LI36600 is a legacy L-frame molded case circuit breaker. While Square D has introduced newer series like the PowerPact L-frame, this exact model remains widely used to maintain and service existing I-Line panelboards without requiring busbar modifications.
What safety precautions are required when installing an I-Line breaker of this size?
Always de-energize the panelboard before installing or removing a 600A breaker. Due to the high fault current ratings and physical weight of the L-frame, installation should only be performed by a qualified, licensed electrician using appropriate personal protective equipment.
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