Square D MGA266002 Molded Case Circuit Breaker
- 600A
- 2 Pole
- I-Line
Quantity
Square D MGA266002 - 600A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
The MGA266002 is a 600A, two-pole molded case circuit breaker from Square D's PowerPacT M-Frame lineup. It utilizes an ET 1.0 electronic trip unit to deliver highly accurate long-time and instantaneous (LI) protection. Engineered for seamless integration, this unit installs into Square D I-Line panelboards. It features an AC phase connection and serves as an upgraded replacement for legacy MA26600 breakers. Rated for 35 kAIC at 480VAC, it provides robust current-limiting performance.Specifications
| Brand | Square D |
|---|---|
| Series | MGA |
| Amperage | 600A |
| 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, 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 |
| Trip Unit Model | ET 1.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| 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 |
Product FAQs
6 answersWhich panelboards are compatible with the MGA266002?
This breaker is designed for use in Square D I-Line panelboards and switchboards. It utilizes the I-Line plug-in mounting style for quick installation.
What wire sizes do the factory lugs on this breaker accept?
The load side lugs accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
What does the LI trip function indicate on this PowerPacT M-frame breaker?
The LI designation means the electronic trip unit features fixed Long-Time and adjustable Instantaneous trip functions. This allows for precise short circuit coordination in your electrical system.
How do I decode the MGA266002 catalog number?
In the Square D PowerPacT nomenclature, M indicates the M-frame, G denotes the interrupting rating, A specifies an I-Line plug-in connection, 2 is for two poles, 6 is for 600VAC, 600 is the 600A rating, and the final 2 indicates the basic ET 1.0 electronic trip unit.
Does this breaker require a separate mounting bracket for I-Line panels?
No, the MGA266002 features an integrated I-Line style plug-in connection on the line side. This allows it to mount directly onto the panelboard bus without additional brackets.
Is the trip unit on the MGA266002 field interchangeable?
No, the basic ET 1.0 electronic trip unit on this M-frame breaker is factory installed and is not field interchangeable.
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