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Square D MJL36400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
MJL36400
Molded Case Circuit Breaker
Brand
Square D
SKU
MJL36400
Quantity
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Square D MJL36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MJL36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs (AL800M23K) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
Quantity
Square D MJL36400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs (AL800M23K) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
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Description
Providing reliable power distribution, the Square D MJL36400 delivers 400A of continuous current protection. This 3-pole, unit-mount PowerPacT M-Frame MCCB is engineered for commercial switchboards and motor control centers. It serves as a seamless replacement for legacy MA36400 and MH36400 breakers, accepting (3) 3/0 AWG to 500 kcmil wiring. Equipped with an ET 1.0 electronic trip unit, it provides precise long-time and instantaneous (LI) protection with a 65 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Lugs (AL800M23K) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free |
Product FAQs
9 answersWhat type of trip unit is installed in the Square D MJL36400?
This breaker features an ET 1.0 electronic trip unit. It provides a fixed long-time (overload) setting and an adjustable instantaneous (short-circuit) trip function, allowing for precise coordination in your electrical system.
What wire sizes are accepted by the lugs on the MJL36400?
The factory-installed lugs accept one aluminum or copper conductor per phase, ranging from 3/0 AWG to 500 kcmil.
What types of equipment is the MJL36400 compatible with?
This PowerPacT M-frame breaker is designed for use in Square D switchboards, motor control centers, and industrial control panels. It is a unit-mount breaker, meaning it bolts directly to the backpan rather than plugging into a bus system.
Does the MJL36400 include a push-to-trip feature?
Yes, it includes an integral push-to-trip button on the front cover. This allows you to manually trip the breaker to verify the mechanical operation of the trip mechanism before energizing the circuit.
Is the MJL36400 rated for 80 percent or 100 percent continuous current?
This breaker carries a standard 80 percent continuous current rating.
Can I install the MJL36400 in an I-Line panelboard?
No, the MJL36400 is a unit-mount (feed-thru) breaker designed for base mounting with lugs on both the line and load sides. For an I-Line panelboard, you need the plug-on I-Line version of the PowerPacT M-frame.
Can I add field-installable accessories to the MJL36400?
Yes, the PowerPacT M-frame supports a variety of field-installable internal accessories. Shunt trips, undervoltage releases, and auxiliary switches can be installed under the front accessory cover.
Where can I find the correct lug torque specifications for the MJL36400?
The required torque values for the wire binding screws are printed directly on the breaker faceplate or the lug itself. Always use a calibrated torque wrench to ensure proper connections and prevent thermal issues.
What does the J in the MJL36400 catalog number signify?
The J indicates the breaking capacity code for this PowerPacT M-frame breaker. It signifies an interrupting rating of 100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC.
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