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Square D MGL36600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Square D
MGL36600
Molded Case Circuit Breaker
Brand
Square D
SKU
MGL36600
Quantity
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Square D MGL36600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MGL36600 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | MGL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Line and Load Lugs Included (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, 80% Rated, Mercury Free, PVC Free, RoHS Compliant, Non-Interchangeable Trip, True RMS Sensing |
Quantity
Square D MGL36600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | MGL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Line and Load Lugs Included (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, 80% Rated, Mercury Free, PVC Free, RoHS Compliant, Non-Interchangeable Trip, True RMS Sensing |
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Description
The MGL36600 is an electronic trip molded case circuit breaker from the Square D PowerPacT M-Frame family. It provides precise long-time and instantaneous (LI) protection for 600A industrial circuits using true RMS sensing. Designed for unit mounting, this 3-pole breaker installs into Square D switchboards and motor control centers. It includes line and load lugs accepting up to 500 kcmil wire. Rated 65kAIC at 240VAC, this HACR-rated MCCB ensures robust fault interruption.Specifications
| Brand | Square D |
|---|---|
| Series | MGL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Line and Load Lugs Included (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, 80% Rated, Mercury Free, PVC Free, RoHS Compliant, Non-Interchangeable Trip, True RMS Sensing |
Product FAQs
8 answersCan I install the MGL36600 circuit breaker directly into an I-Line panelboard?
No, the MGL36600 is a unit-mount circuit breaker designed for mounting on a backpan or plate inside enclosures, switchboards, or motor control centers. If you need a breaker for an I-Line panelboard, you must source the I-Line version of the PowerPact M-frame, which features a plug-on stab connection.
What does the 'G' represent in the MGL catalog number?
In Square D's PowerPact naming convention, the 'G' indicates the interrupting rating tier. For this specific breaker, it guarantees a short-circuit interrupting capacity of 65kA at 240VAC, 35kA at 480VAC, and 18kA at 600VAC.
What is the recommended tightening torque for the wire terminals?
The factory-installed mechanical lugs on this breaker accommodate three 3/0 AWG to 500 kcmil copper or aluminum conductors per phase. The manufacturer requires a tightening torque of 442.5 lb-in (50 N-m) for a secure and code-compliant installation.
How do I adjust the ET 1.0 electronic trip unit on this breaker?
The ET 1.0 unit features standard LI (Long-Time and Instantaneous) functions. The Long-Time overload protection is fixed at the 600A rating. The Instantaneous short-circuit protection is adjustable, typically allowing settings from 1200A to 6000A using the dial on the front of the breaker to coordinate with downstream devices.
Is this circuit breaker rated for 100 percent continuous load operation?
No, the MGL36600 carries a standard 80 percent continuous current rating. Per the National Electrical Code, continuous loads (those lasting three hours or more) must not exceed 480A, which is 80 percent of the breaker's 600A nominal rating.
Are the line and load side lugs removable?
Yes, the standard AL800M23K mechanical lugs can be removed. This allows the breaker to be adapted for other termination methods, such as compression lugs or busbar connections, provided you use the correct Square D hardware kits.
Is the MGL36600 HACR rated for HVAC equipment?
Yes, this PowerPact M-frame circuit breaker carries an HACR rating, certifying it for safe use in heating, air conditioning, and refrigeration branch circuits.
What physical frame size is the MGL36600?
This unit is a PowerPact M-frame circuit breaker. Even though it is rated for 600A, it shares the exact same 800-amp physical footprint as other M-frame breakers. This standardized sizing simplifies enclosure planning and mounting across different amperage configurations.
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