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Square D MAL36450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Unit Mount
Square D
MAL36450
Molded Case Circuit Breaker
Brand
Square D
SKU
MAL36450
Quantity
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Square D MAL36450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Square D MAL36450 - 450A 3 Pole Molded Case Circuit Breaker
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| Brand | Square D |
|---|---|
| Part Number | MAL36450-R |
| Series | MAL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Quantity
Square D MAL36450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36450-R |
| Series | MAL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
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Description
Engineered for heavy-duty industrial applications, the Square D MAL36450 is a 3-pole, 450A molded case circuit breaker from the legacy M-Frame family. It provides reliable overcurrent protection for commercial facilities. This unit mount MCCB installs into Square D switchboards and motor control centers. For modern upgrades, this frame has been replaced by the PowerPact MGA36450. Equipped with a thermal-magnetic trip unit, it features an adjustable magnetic trip and a 42kAIC rating at 240V.Specifications
| Brand | Square D |
|---|---|
| Part Number | MAL36450-R |
| Series | MAL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 14kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhat is the modern replacement for the legacy MAL36450 circuit breaker?
The MAL36450 is a legacy M-Frame breaker. For modern upgrades, it has been replaced by the Square D PowerPact M-Frame series. Panel builders should verify their required interrupting ratings and mounting style when selecting a PowerPact replacement.
What wire sizes are accepted by the terminals on the MAL36450?
The standard line and load lugs accept three 3/0 AWG to 500 kcmil conductors per phase for both aluminum and copper wiring. Ensure proper torque specifications are followed during installation to prevent terminal overheating.
What protection is provided by the LI trip unit on this breaker?
The LI designation indicates a thermal-magnetic trip unit that delivers Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. The thermal element is fixed, while the magnetic trip threshold is adjustable.
Can the MAL36450 be utilized in DC power applications?
Yes, this circuit breaker is rated for direct current systems up to 250VDC with an interrupting rating of 14kAIC. This makes it suitable for specific industrial control circuits or battery backup systems requiring DC overcurrent protection.
How does the adjustable magnetic trip benefit panel builders?
The adjustable magnetic trip allows installers to set the instantaneous short-circuit response to match the specific fault current calculations of the facility. This helps achieve proper selective coordination with downstream devices and minimizes nuisance tripping.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 5 reviews.
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Rating
5 reviews
- 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
- JMJohn M.ReviewingSquare D MAL36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/13/21Clean and very well packaged
Breaker arrived as advertised. Very clean, wrapped and packed with alot of care to ensure it arrived safely.