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Square D MJL36500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Unit Mount
Square D
MJL36500
Molded Case Circuit Breaker
Brand
Square D
SKU
MJL36500
Quantity
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Square D MJL36500 - 500A 3 Pole Molded Case Circuit Breaker
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Description
Part of the PowerPacT M-Frame series, this 500A electronic trip breaker delivers reliable protection for industrial facilities. It integrates into Square D switchboards and motor control centers. Designed as a unit-mount solution, it replaces discontinued MA36500 and MH36500 models. The included lugs accept 3/0 AWG to 500 kcmil wiring. Featuring a microprocessor-based LI trip unit, it offers superior coordination over thermal-magnetic designs with a 65kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Series | MJL |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch, Handle Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| 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, 80% Rated, Mercury Free, PVC Free, Non-Interchangeable Trip |
Product FAQs
4 answersWhich legacy Square D breakers does the MJL36500 replace?
The MJL36500 is the modern PowerPacT replacement for the discontinued MA36500 and MH36500 unit-mount circuit breakers. It upgrades the older thermal-magnetic mechanisms to a solid-state electronic trip unit for improved coordination.
How does the ET 1.0 electronic trip unit on the MJL36500 operate?
The ET 1.0 solid-state trip unit provides Long-Time and Instantaneous (LI) protection. The long-time overload protection is fixed at 500A, while the instantaneous short-circuit pickup is adjustable, allowing electricians to fine-tune the breaker for specific system coordination requirements.
Can the MJL36500 be installed in an I-Line panelboard?
No, the MJL36500 is a unit-mount breaker designed for bolt-on installation in Square D switchboards, motor control centers, and industrial control panels. For I-Line panelboards, a plug-on M-frame variant is required.
Why use an electronic trip unit instead of a standard thermal-magnetic breaker?
The microprocessor-based electronic trip unit in the MJL36500 delivers more precise tripping performance and is not affected by ambient temperature changes. This ensures reliable overcurrent and short-circuit protection regardless of the environmental conditions inside the electrical room or enclosure.
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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.ReviewingSquare D MJL36800 - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/26/22great
great
- SMStephan M.ReviewingSquare D MJL36800 - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 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