Free Shipping Over $99
Square D MJA36800E10 Molded Case Circuit Breaker
- 800A
- 3 Pole
- I-Line
Square D
MJA36800E10
Molded Case Circuit Breaker
Brand
Square D
SKU
MJA36800E10
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D MJA36800E10 - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
700A 3 Pole Molded Case Circuit Breaker
600A 3 Pole Molded Case Circuit Breaker
500A 3 Pole Molded Case Circuit Breaker
Description
Offering highly configurable protection, the Square D MJA36800E10 is a 3-pole, 800A molded case circuit breaker equipped with an advanced adjustable electronic trip unit. It installs into I-Line panelboards and switchboards, serving as a drop-in replacement for discontinued MA and MH frames. With the ability to adjust the trip setting between 300A and 800A, this 65 kAIC (at 480V) breaker allows facility managers to precisely coordinate their electrical distribution systems.Specifications
| Brand | Square D |
|---|---|
| Series | MJA |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 300-800A |
|---|
| Frame Type | MJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (AL800M23K) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Mercury Free, PVC Free, Push-to-Trip, 80% Rated |
Product FAQs
6 answersCan the MJA36800E10 be used to replace older Square D circuit breakers?
Yes, the PowerPacT M-Frame MJA36800E10 is engineered as a direct drop-in replacement for discontinued Square D MA and MH frame circuit breakers in existing I-Line panelboards and switchboards.
What does the E10 suffix in the MJA36800E10 catalog number indicate?
The E10 suffix denotes that the breaker is equipped with an ET 1.0 basic electronic trip unit. This solid-state technology provides Long-Time and Instantaneous (LI) overcurrent protection.
How is the continuous current rating adjusted on this breaker?
The electronic trip unit features a selector dial that allows electricians to adjust the long-time trip setting between 300A and 800A. This enables precise coordination with the specific ampacity requirements of your electrical distribution system.
What are the advantages of the ET 1.0 electronic trip unit over standard thermal-magnetic breakers?
Solid-state electronic trip units simulate thermal-magnetic functions but deliver highly accurate, repeatable tripping performance. They are also significantly less sensitive to ambient temperature changes inside the panel enclosure.
Is the MJA36800E10 rated for 80 percent or 100 percent continuous current?
This standard Square D PowerPacT M-Frame molded case circuit breaker carries an 80 percent continuous current rating.
What type of panelboard is required for the MJA36800E10?
This breaker features a line-side I-Line plug-in bracket. It must be installed in a Square D I-Line panelboard or switchboard that has sufficient bus capacity and physical mounting space to accommodate an 800A M-Frame device.
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.