Square D MGA264002 Molded Case Circuit Breaker
- 400A
- 2 Pole
- I-Line
Quantity
Square D MGA264002 - 400A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for commercial and industrial power distribution, this 400-amp PowerPacT M-Frame breaker features a microprocessor-based ET 1.0 trip unit with Long-Time and Instantaneous (LI) protection. It mounts into Square D I-Line panelboards, offering a secure plug-on connection that speeds up installation. Serving as a modern upgrade, this unit replaces legacy MA26400 breakers while delivering enhanced reliability and a 65kAIC rating at 240V.Specifications
| Brand | Square D |
|---|---|
| Series | MGA |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 3x 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 |
|---|---|
| Accessories | Lugs (Load Side) |
| 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, Mercury Free, PVC Free, Push-to-Trip, Visual Trip Indicator, 80% Rated, 2-Pole in 3-Pole Housing |
Product FAQs
7 answersWhat type of panels are compatible with the MGA264002?
This breaker is specifically designed for installation in Square D I-Line panelboards and switchboards. It utilizes a plug-on jaw connection that mounts directly to the bus assembly.
What does the LI trip function mean on this electronic trip unit?
The LI designation indicates that the breaker provides Long-Time (L) and Instantaneous (I) protection. It features a fixed thermal rating for overload protection and an adjustable magnetic setting for short-circuit protection.
What wire sizes can be used with the factory lugs?
The standard lugs on this breaker accept up to three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
What does the G in the MGA264002 catalog number indicate?
The G specifies the interrupting rating tier within the PowerPacT M-frame family. This tier provides a maximum interrupting capacity of 65kA at 240VAC, 35kA at 480VAC, and 18kA at 600VAC.
Can this 2-pole breaker be used in a 3-phase system?
Yes. While it is a 2-pole breaker, it can be installed across two phases of a 3-phase I-Line bus system to supply single-phase loads.
Does this breaker require a separate mounting bracket for installation?
No. The I-Line plug-on design includes integral mounting brackets that secure the breaker directly to the panelboard backpan, eliminating the need for separate mounting hardware.
What does the 2 at the end of the MGA264002 catalog number mean?
The final 2 in the catalog number indicates that this 2-pole I-Line breaker is factory-configured for an AC phase connection on the panelboard bus.
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