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Square D LHL36400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LHL36400
Molded Case Circuit Breaker
Brand
Square D
SKU
LHL36400
Quantity
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Square D LHL36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LHL36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LHL36400 |
| Series | LHL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | LHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Mercury Free, RoHS Compliant, Push-to-Trip |
Quantity
Square D LHL36400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LHL36400-R |
| Series | LHL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | LHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Mercury Free, RoHS Compliant, Push-to-Trip |
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Description
Delivering robust thermal-magnetic protection, the Square D LHL36400 is a heavy-duty 3-pole, 400A molded case circuit breaker designed for demanding commercial environments. As part of the legacy L-Frame series, it utilizes an adjustable magnetic pickup to handle overloads effectively. This unit mount breaker is built for integration into Square D switchboards and standalone enclosures. It provides 35kAIC at 480VAC. For modern upgrades, it is replaced by the LGL36400 series.Specifications
| Brand | Square D |
|---|---|
| Part Number | LHL36400 |
| Series | LHL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | LHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL400LA) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Mercury Free, RoHS Compliant, Push-to-Trip |
Product FAQs
8 answersWhat enclosures and panels are compatible with the LHL36400?
This unit-mount circuit breaker integrates seamlessly into Square D L-frame enclosures, switchboards, and panelboards that are configured for lug-to-lug, feed-thru connections.
Can the LHL36400 be used to replace a standard LAL36400?
Yes. It features the exact same physical dimensions and mounting footprint as the LAL36400 but provides a higher interrupting capacity, making it a safe and direct upgrade for legacy systems.
Can the trip characteristics be adjusted on this model?
Yes. While the thermal overload protection is fixed, the magnetic short-circuit pickup is adjustable. This allows electricians to fine-tune the instantaneous trip response to suit specific load requirements.
What wire configurations do the standard factory lugs accept?
The standard mechanical lugs accommodate either a single 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors per phase. They are rated for both aluminum and copper wiring.
What is the modern PowerPact equivalent for this legacy breaker?
If you are upgrading to current-generation hardware, the legacy L-Frame series has been superseded by the PowerPact L-Frame family, specifically models like the LGL36400.
Is this breaker suitable for use in an I-Line panelboard?
No. Because it is a unit-mount model, it requires cabled connections on both the line and load sides. It lacks the plug-on jaw mechanism needed to attach directly to a Square D I-Line bus.
Does this breaker provide a safe way to test the trip mechanism?
Yes. It includes a built-in push-to-trip button on the face of the unit. This allows operators to manually exercise the mechanical linkage and verify proper operation without being exposed to live electrical parts.
Is the LHL36400 rated for HVAC equipment?
Yes, this model is HACR rated. It is fully approved for use with heating, air conditioning, and refrigeration equipment, ensuring proper overload and short-circuit protection for those specific commercial motor loads.
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