Square D MGP36400SA Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Square D MGP36400SA - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Part of the PowerPacT M-Frame family, the Square D MGP36400SA is a 3-pole, 400A molded case circuit breaker designed for commercial and industrial applications. It utilizes electronic trip technology to provide highly accurate long-time and instantaneous (LI) protection. This unit-mount breaker installs into Square D I-Line panelboards, QED switchboards, and Model 6 motor control centers. For legacy upgrades, it is replaced by the PGL36040U31A.Specifications
| Brand | Square D |
|---|---|
| Part Number | MGP36400SA |
| Series | MGP |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards (HCP, HCN, HCM Main), QED Switchboards, Model 6 Motor Control Centers |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| 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, Visual Trip Indicator, RoHS Compliant |
Product FAQs
8 answersWhat enclosures and panelboards are compatible with the MGP36400SA?
This unit-mount breaker installs into Square D QED switchboards, Model 6 motor control centers, and serves as a main breaker in HCP, HCN, and HCM I-Line panelboards.
What wire sizes are accepted by the lugs on the MGP36400SA?
The breaker includes lugs that accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
How is the electronic trip unit configured on this breaker?
It features an electronic trip unit with Long-Time and Instantaneous (LI) protection. The Long-Time setting is fixed, while the Instantaneous pickup is adjustable for selective coordination with downstream loads.
Is the MGP36400SA rated for 100 percent continuous load?
No, this is a standard 80 percent rated circuit breaker. Continuous loads should not exceed 320 amps, which is 80 percent of its 400A rating, for more than three hours.
What is the recommended replacement for the MGP36400SA?
For legacy upgrades, the M-Frame MGP36400SA is replaced by the PowerPacT P-Frame PGL36040U31A.
How does the MGP36400SA mount within an enclosure?
It utilizes a unit-mount, bolt-on connection. It fastens directly to the mounting pan or chassis rather than plugging onto a busbar system.
Is this breaker suitable for HVAC applications?
Yes, the MGP36400SA is HACR rated, making it approved for use with heating, air conditioning, and refrigeration equipment. It also features a visual trip indicator for quick fault identification.
What internal accessories are compatible with the MGP36400SA?
This breaker supports several optional accessories, including auxiliary switches, alarm switches, undervoltage releases, and padlock attachments. Shunt trips are also available but are factory-installed.
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