Square D MX36800G Molded Case Circuit Breaker
- 800A
- 3 Pole
- I-Line
Quantity
Square D MX36800G - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy M-Frame series, the Square D MX36800G is a 3-pole, 800A molded case circuit breaker designed for industrial power distribution. This I-Line breaker installs into compatible Square D panelboards. It serves as a reliable replacement for older systems, with the PowerPacT P-Frame (PJA360800U44A) acting as its modern equivalent. Delivering a 65kAIC interrupt rating at 480V, it features LSIG functions for long-time, short-time, instantaneous, and ground fault protection.Specifications
| Brand | Square D |
|---|---|
| Series | MX |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | MX |
|---|---|
| Terminal Type | Lugs |
| For Use With | I-Line Panelboards, Switchboards |
| 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 | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | -25C to 60C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
8 answersWhat type of panelboards accept the MX36800G?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes an I-Line style plug-in connection on the line side and standard mechanical lugs on the load side.
Can the MX36800G be individually mounted in a standard NEMA enclosure?
No. Because it features an I-Line style plug-in connection on the line side, it must be installed in an I-Line panelboard or switchboard. It cannot be individually cable-connected on the line side without a specialized I-Line mounting pan.
What does the G suffix in the MX36800G catalog number indicate?
The G suffix designates that the breaker includes Ground-Fault trip protection. This is an integrated feature of the Micrologic LSIG electronic trip unit.
What specific protection parameters can be adjusted on the MX36800G?
The electronic trip unit features LSIG functionality, allowing users to adjust the pickup and delay settings for Long-Time, Short-Time, Instantaneous, and Ground-Fault protection to coordinate with the specific electrical system.
How are the load side connections configured on the MX36800G?
The load side is equipped with mechanical lugs designed to accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase. The line side utilizes the I-Line plug-in connection.
Does the MX36800G require a neutral current transformer for ground fault protection?
When installed on a 3-phase, 4-wire system, an external neutral current transformer (NCT) is required to properly monitor neutral current and ensure accurate ground-fault protection.
What frame family does the MX36800G belong to?
This breaker is part of the Square D M-frame family, which accommodates amperage ratings from 100A up to 800A.
Is the Square D MX frame still in active production?
No, the MX frame is a legacy molded case circuit breaker series that has been discontinued by the manufacturer.
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