Square D MAL36600-1021 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Unit Mount
Quantity
Square D MAL36600-1021 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D MAL36600-1021 - 600A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36600-1021 |
| Series | MAL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Quantity
Square D MAL36600-1021 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | MAL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Description
Built for remote-trip applications, the Square D MAL36600-1021 is a 600A, 3-pole molded case circuit breaker featuring a factory-installed shunt trip. This legacy M-Frame device provides robust thermal-magnetic protection for industrial facilities. The unit-mount design integrates into Square D switchboards, motor control centers, and enclosures. It is replaced by the MGL36600 with an added shunt trip accessory. Delivering 30kAIC at 480VAC, it includes adjustable magnetic trip settings.Specifications
| Brand | Square D |
|---|---|
| Series | MAL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersWhat does the "-1021" suffix indicate on the MAL36600-1021?
The "-1021" suffix designates that this breaker includes a factory-installed 120/240VAC shunt trip accessory. This allows the breaker to be opened remotely via a separate control circuit, which is commonly used for emergency power-off (EPO) or fire alarm integration.
What is the modern replacement for the legacy MAL36600-1021?
The MAL36600-1021 is a legacy M-Frame breaker. For new installations or modern upgrades, Square D replaces this with the PowerPact M-Frame series, specifically the MGL36600, which must be ordered with a compatible shunt trip accessory to match the "-1021" functionality.
What are the wire size and terminal requirements for this breaker?
The MAL36600-1021 comes with factory-installed feed-thru lugs that accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase. Ensure proper torque specifications are followed during installation to prevent thermal issues.
Where is the MAL36600-1021 typically installed?
This unit-mount breaker is designed for integration into Square D switchboards, motor control centers (MCCs), and standalone industrial enclosures. It is not compatible with I-Line panelboards, which require plug-on bracket mounting.
How does the adjustable magnetic trip function work on this breaker?
While the thermal overload protection is fixed at 600A, the magnetic instantaneous trip (I) is adjustable. This allows panel builders and electricians to fine-tune the short-circuit response threshold to ensure proper selective coordination with downstream devices.
Can this breaker be manually tripped for maintenance or testing?
Yes, the MAL36600-1021 features a push-to-trip button on the faceplate. This standard Square D safety feature allows electricians to manually exercise the breaker mechanism and verify the mechanical linkage is functioning properly without exposing personnel to live parts.
Can the MAL36600-1021 be used in DC applications?
Yes, this breaker is rated for use in 250VDC systems with an interrupting capacity of 14kAIC, making it suitable for specific industrial DC distribution or battery backup applications.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
- GPGerry P.Verified BuyerReviewingSquare D MAL36500 - 500A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Electrician
Have not installed the bakery yet however it does look like it’s in good condition
- JMJAY M.Verified BuyerReviewingSquare D MAL36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/29/25POLE CIRCUIT BREAKER
SQUARE D CIRCUIT BREAKER DELIVERED REAL FAST AND AT A GREAT PRICE
- DFDavid F.Verified BuyerReviewingSquare D MAL36800 - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/14/25thank you for all your
thank you for all your help
- RRyanReviewingSquare D MAL361000 - 1000A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/27/245 Stars
Amazing costumer service
- MCMARCUS C.ReviewingSquare D MAL36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/4/23Great supplier /saves the Bacon every time
I did not know it shipped - I will check - you guys are great