Free Shipping Over $99
Square D MGA36400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
MGA36400
Molded Case Circuit Breaker
Brand
Square D
SKU
MGA36400
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D MGA36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MGA36400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | MGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | MGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| 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, Visual Trip Indicator, 80% Rated |
Quantity
Square D MGA36400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | MGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | MGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| 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, Visual Trip Indicator, 80% Rated |
Similar Items
500A 3 Pole Molded Case Circuit Breaker
300A 3 Pole Molded Case Circuit Breaker
600A 3 Pole Molded Case Circuit Breaker
Description
Belonging to the PowerPacT M-frame family, this 400A electronic trip breaker provides reliable power distribution for industrial facilities. The microprocessor-controlled unit ensures highly accurate sensing. Designed for Square D I-Line panelboards, the plug-on phase connections simplify installation. It serves as a modern replacement for legacy MA36400 models. Featuring adjustable magnetic trip settings, it achieves a 35kAIC rating at 480VAC and includes a push-to-trip testing mechanism.Specifications
| Brand | Square D |
|---|---|
| Series | MGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | MGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| 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, Visual Trip Indicator, 80% Rated |
Product FAQs
10 answersCan I use the MGA36400 to replace an older MA36400 circuit breaker?
Yes, the PowerPacT M-frame MGA36400 [2.1.1] is the modern replacement for legacy MA and MH frame circuit breakers, including the MA36400. It features a more compact footprint while maintaining full compatibility with existing I-Line panelboards.
How much bus space does this circuit breaker require in an I-Line panel?
The MGA36400 requires 9 inches of I-Line mounting space on the panelboard bus.
What is the recommended lug tightening torque for this circuit breaker?
The factory load lugs require a tightening torque of 442.5 lbf.in (50 N.m).
What are the exact pickup settings for the trip unit?
It is equipped with a basic ET 1.0 electronic trip unit. The long-time (L) pickup is fixed at 400A, while the instantaneous (I) trip is adjustable from a low of 800A to a high of 4000A.
Is the ET 1.0 trip unit interchangeable or field-replaceable?
No, the basic ET 1.0 electronic trip unit is factory-sealed. It cannot be replaced, swapped, or upgraded in the field.
What phase connection does this breaker use?
The standard MGA36400 utilizes an ABC phase connection for the I-Line bus.
How many conductors per phase do the load lugs accept?
The factory mechanical load lugs are designed to terminate three parallel conductors per phase. Each of these conductors must be sized between 3/0 AWG and 500 kcmil, and they accept either aluminum or copper wire.
Does this breaker feature a manual push-to-trip button?
Yes, it includes an integral push-to-trip button on the cover to manually trip the breaker and test the mechanical operation.
Will the MGA36400 fit in a standard Square D NQ or NF panelboard?
No, this breaker utilizes an I-Line style plug-in connection. It is strictly designed for Square D I-Line panelboards and switchboards, and cannot be used in NQ or NF distribution panels.
Is this a 100% rated circuit breaker?
No, the MGA36400 carries a standard 80% continuous current rating.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.