Square D MX36225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- I-Line
Quantity
Square D MX36225 - 225A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
A drop-in solution for legacy systems, the MX36225 is a 225A, 3-pole electronic trip circuit breaker from Square D. It is engineered to protect commercial and industrial electrical infrastructure. This MCCB features an I-Line mounting style, allowing it to mount into existing Square D I-Line panelboards and switchboards. It is replaced by the JJA36225. Equipped with Long-Time, Short-Time, and Instantaneous (LSI) functions, it offers advanced coordination. It delivers 65kAIC at 480V.Specifications
| Brand | Square D |
|---|---|
| Part Number | MX36225 |
| Series | MX |
| Amperage | 225A |
| 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
6 answersWhat equipment is the MX36225 designed to fit?
It features an I-Line mounting style, making it a plug-on breaker compatible with Square D I-Line panelboards and switchboards.
What does the LSI trip function provide on this breaker?
The Micrologic electronic trip unit offers Long-Time, Short-Time, and Instantaneous (LSI) adjustability. This allows panel builders to fine-tune the trip curve for precise selective coordination with downstream and upstream devices.
What is the purpose of the ARP090 rating plug?
The factory-installed ARP090 rating plug sets the maximum continuous current rating for the solid-state trip unit, ensuring the breaker operates accurately at its 225A specification.
What is the modern replacement for the legacy MX36225?
The MX frame is a legacy series. The modern equivalent for a 225A, 3-pole, I-Line breaker is the PowerPact J-Frame series, such as the JJA36225, which mounts to the same I-Line bus.
How does the I-Line mounting system work for this breaker?
The breaker uses a plug-on design with jaw-like connectors that snap directly onto the I-Line busbar. This allows for faster installation and phase balancing compared to traditional bolt-on breakers.
What safety precautions are required when installing this I-Line breaker?
Installation must be performed by a qualified electrician. Ensure the panelboard is fully de-energized and follow all standard lockout/tagout procedures before seating the breaker onto the busbar.
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