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Square D MJL36800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Square D
MJL36800
Molded Case Circuit Breaker
Brand
Square D
SKU
MJL36800
Quantity
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Square D MJL36800 - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MJL36800 - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| 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 | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | 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, Current Limiting, Mercury Free, PVC Free |
Quantity
Square D MJL36800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| 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 | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | 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, Current Limiting, Mercury Free, PVC Free |
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Description
Built for heavy-duty power distribution, the Square D MJL36800 is an 800A, 3-pole molded case circuit breaker. As part of the PowerPacT M-frame series, it utilizes a unit-mount configuration with factory-installed lugs for secure integration into switchboards and motor control centers. This model provides an easy upgrade path for obsolete MA36800 and MH36800 breakers. The integrated ET 1.0 electronic trip unit ensures precise LI protection. It boasts a 65 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Industrial Control Panels |
| 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 | Shunt Trip, Undervoltage Release, Alarm Switch, Auxiliary Switch, Handle Padlock Attachment |
|---|---|
| Accessories | 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, Current Limiting, Mercury Free, PVC Free |
Product FAQs
8 answersWhat wire size do the standard lugs on the MJL36800 accept?
The factory-installed AL800M23K lugs accommodate up to three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase. The required lug tightening torque is 442.5 lbf-in (50 N.m).
Can the MJL36800 be mounted in a Square D I-Line panelboard?
No. The MJL36800 is a unit-mount (feed-thru) breaker designed for individual mounting on a backpan or plate using its line and load lugs. For I-Line panelboards, the I-Line equivalent (MJA36800) is required.
Is the MJL36800 a direct replacement for older MA or MH series breakers?
Yes, the PowerPacT M-frame is the modern replacement for obsolete Square D MA36800 and MH36800 circuit breakers. It provides an easy upgrade path, sharing the same dimensions, mounting footprint, and cabling layout.
What does the J in the MJL36800 catalog number indicate?
The J indicates the interrupting capacity tier of the breaker. For this M-frame breaker, the J-rating provides an interrupting rating of 100kA at 240VAC, 65kA at 480VAC, and 25kA at 600VAC.
Is the MJL36800 circuit breaker rated for 100% continuous load?
No, the MJL36800 is a standard 80% rated circuit breaker. For continuous operation, the circuit load should not exceed 640A, which is 80% of its 800A maximum rating.
Can the ET 1.0 trip unit on the MJL36800 be replaced or upgraded in the field?
No, the built-in ET 1.0 electronic trip unit is factory-installed and cannot be field-replaced. It functions as a highly accurate electronic equivalent to a standard thermal-magnetic trip unit.
How is the trip curve configured on the MJL36800?
The breaker provides basic Long-Time (L) and Instantaneous (I) protection. The overload (long-time) setting is fixed at 800A, while the instantaneous magnetic protection is field-adjustable to dial in protection against short circuits.
Does the MJL36800 support field-installable electrical accessories?
Yes, the PowerPacT M-frame supports a wide range of field-installable accessories, including shunt trips, undervoltage releases, alarm switches, and auxiliary switches.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- GIGeiser I.Rated 5 out of 5 stars2/26/22great
great
- SMStephan M.Rated 5 out of 5 stars11/24/21The price and delivery was
The price and delivery was excellent, However when I called in for an issue with mounting hardware, the representative said she would check on it and call back. , but she has never called me back. Actually she acted like she did not care