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Square D MX36800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- I-Line
Square D
MX36800
Molded Case Circuit Breaker
Brand
Square D
SKU
MX36800
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Square D MX36800 - 800A 3 Pole Molded Case Circuit Breaker
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800A 3 Pole Molded Case Circuit Breaker
800A 3 Pole Molded Case Circuit Breaker
Description
Part of the legacy M-Frame series, this 800A molded case circuit breaker delivers robust overcurrent protection for commercial and industrial facilities. The unit features an advanced electronic trip system with adjustable Long-Time, Short-Time, and Instantaneous (LSI) settings, allowing for precise coordination. It is designed to install into Square D I-Line panelboards and switchboards. Rated for 65kAIC at 480VAC, this breaker serves as a reliable replacement for older installations.Specifications
| Brand | Square D |
|---|---|
| Part Number | MX36800 |
| Series | MX |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| 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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| 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
5 answersWhat type of enclosures accept the Square D MX36800?
This breaker features an I-Line style plug-in connection and is designed specifically for Square D I-Line panelboards and switchboards. It is not compatible with standard bolt-on or lug-to-lug unit mount applications.
What does the LSI designation mean on the MX36800 trip unit?
LSI indicates that the solid-state electronic trip unit features adjustable Long-Time, Short-Time, and Instantaneous trip functions. This allows for precise selective coordination with other protective devices in the electrical distribution system.
What are the wire size requirements for the MX36800 lugs?
The standard lugs accommodate three conductors per phase, accepting wire sizes from 3/0 AWG to 500 kcmil for both aluminum and copper conductors.
Is the MX36800 part of a current breaker series?
The MX36800 is a legacy M-Frame molded case circuit breaker. For modern upgrades or replacements in I-Line panelboards, Square D typically utilizes the PowerPacT M-Frame series, though the MX36800 remains a direct replacement for existing legacy installations.
What are the primary safety steps for installing this 800A I-Line breaker?
Always de-energize the switchboard or panelboard before installation. Use appropriate personal protective equipment (PPE) and verify that all power sources are locked out and tagged out (LOTO) prior to seating the breaker onto the I-Line bus.
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