Square D MJP36600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Square D
MJP36600
Molded Case Circuit Breaker
Brand
Square D
SKU
MJP36600
Quantity
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Square D MJP36600 - 600A 3 Pole Molded Case Circuit Breaker
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600A 3 Pole Molded Case Circuit Breaker
600A 3 Pole Molded Case Circuit Breaker
Description
Rated for 65 kAIC at 480V, the MJP36600 600A, 3-pole molded case circuit breaker comes equipped with an ET 1.0 electronic trip unit. It provides highly accurate long-time and instantaneous (LI) sensing for commercial power systems. This unit-mount breaker installs into Square D switchboards, panelboards, and motor control centers. Note that this specific M-Frame model has been replaced by the newer PJP36060U31A. It features an 80% continuous current rating and Visi-Trip technology.Specifications
| Brand | Square D |
|---|---|
| Part Number | MJP36600 |
| Series | MJP |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC |
| Frame Type | MJP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Panelboards |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs (Load Side), Terminal Nuts (Line 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 | 80% Rated, HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersCan the MJP36600 be used to replace older Square D circuit breakers?
Yes, PowerPacT M-Frame breakers like the MJP36600 are designed to replace traditional MA and MH frame circuit breakers, offering a smaller footprint while maintaining common mounting and cabling.
What is the recommended tightening torque for the load-side lugs on the MJP36600?
The standard AL800M23K lugs on this breaker should be torqued to 442.5 lbf-in (50 N.m) for 3/0 AWG to 500 kcmil aluminum or copper wire.
What is the instantaneous trip adjustment range for this 600A breaker?
The ET 1.0 electronic trip unit features an adjustable instantaneous (magnetic) trip range of 1200A to 6000A, which is 2 to 10 times the nominal 600A rating.
Is the MJP36600 rated for 100 percent continuous current?
No, this PowerPacT M-Frame circuit breaker is standard 80 percent rated. Continuous loads should not exceed 480 amps, which is 80 percent of its 600A nominal rating.
How does the MJP36600 mount into a panelboard or switchboard?
This is a unit-mount (bolt-on) circuit breaker. It features terminal nuts on the line side for fixed busbar connections and mechanical lugs on the load side.
Can the ET 1.0 trip unit in the MJP36600 be swapped or upgraded in the field?
No, the basic ET 1.0 electronic trip unit is built-in and cannot be field-replaced. It serves as an electronic equivalent to a standard thermal-magnetic breaker with fixed long-time protection.
Does the MJP36600 include a manual testing feature?
Yes, it includes an integral push-to-trip button on the cover, allowing you to manually trip the breaker to verify the mechanical operation of the tripping mechanism.
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