Square D MGL36300SA Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Quantity
Square D MGL36300SA - 300A 3 Pole Molded Case Circuit Breaker
New
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Description
Part of the PowerPacT M-Frame series, the Square D MGL36300SA provides solid-state protection for industrial systems. This 3-pole, 300A MCCB features an ET 1.0 electronic trip unit with fixed long-time and adjustable instantaneous (LI) functions. Designed for unit mount installations, it integrates into Square D switchboards and enclosures. It includes AL800M23K lugs and a 120VAC shunt trip for remote tripping. Rated 65kAIC at 240VAC, this true RMS sensing breaker ensures precise coordination.Specifications
| Brand | Square D |
|---|---|
| Part Number | MGL36300SA |
| Series | MGL |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | MGL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Shunt Trip 120VAC, Lugs (AL800M23K) |
| 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, 80% Rated, True RMS Sensing, RoHS Compliant, Mercury Free, PVC Free |
Product FAQs
7 answersWhat does the SA suffix mean in the MGL36300SA part number?
The SA suffix indicates that this breaker includes a factory-installed 120VAC shunt trip. This feature allows the breaker to be tripped remotely for emergency shutoffs or safety system integration.
What type of trip unit is used in the MGL36300SA?
It uses a built-in ET 1.0 electronic trip unit. This provides true RMS sensing with fixed long-time and adjustable instantaneous protection, offering better accuracy than standard thermal-magnetic units.
Can the ET 1.0 trip unit on the MGL36300SA be replaced or upgraded in the field?
No, the ET 1.0 electronic trip unit is factory-installed and cannot be field replaced.
Which lugs are included with this breaker, and what is their wire capacity?
The MGL36300SA comes standard with AL800M23K lugs on both the line and load sides. Each lug accepts three 3/0 AWG to 500 kcmil aluminum or copper conductors.
Is the MGL36300SA physically interchangeable with other PowerPacT frames?
Yes, PowerPacT M-Frame breakers share the same dimensions, mounting, bussing, cabling, and door cut-outs as PowerPacT P-Frame circuit breakers.
Does the MGL36300SA include a manual testing feature?
Yes, all PowerPacT M-Frame circuit breakers feature an integral push-to-trip button on the cover. This allows you to manually trip the breaker to verify the mechanical operation of the tripping mechanism.
Is the MGL36300SA rated for 80 percent or 100 percent continuous current?
This breaker has a standard 80 percent continuous current rating.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- FFFredrick F.ReviewingSquare D MGL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/2/21great service
very pleased with service