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Square D MAL36350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Unit Mount
Square D
MAL36350
Molded Case Circuit Breaker
Brand
Square D
SKU
MAL36350
Quantity
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Square D MAL36350 - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MAL36350 - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36350 |
| Series | MAL |
| Amperage | 350A |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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 MAL36350 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36350-R |
| Series | MAL |
| Amperage | 350A |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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 |
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Description
Engineered for commercial and industrial applications, the Square D MAL36350 provides robust overcurrent protection. This 350A, 3-pole MCCB features a thermal-magnetic trip unit with long-time and instantaneous (LI) functions and adjustable magnetic settings. Designed as a unit mount solution, it installs into Square D switchboards and motor control centers. As a legacy M-Frame device, it replaces older units and is superseded by the MGL36350. It is rated 42kAIC at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | MAL36350 |
| Series | MAL |
| Amperage | 350A |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| 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
6 answersIs the Square D MAL36350 still manufactured?
The MAL36350 is a legacy M-frame molded case circuit breaker. For modern upgrades, Square D transitioned to the PowerPact M-frame series, such as the MGL36350 or MJL36350. These newer models utilize electronic trip units but share similar footprint characteristics for retrofit applications.
What is the recommended lug torque for the MAL36350 terminals?
This breaker typically utilizes the AL900MA mechanical lug kit. The recommended tightening torque for these lugs is 300.9 lb-in (34 N.m) when terminating 3/0 AWG to 500 kcmil copper or aluminum conductors. Always verify the exact torque specifications printed on the breaker label prior to installation.
What does the "LI" trip function mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function provides immediate tripping during short-circuit fault conditions.
Can the instantaneous trip point be adjusted on the MAL36350?
Yes. While the thermal overload protection is fixed at 350 amps, the magnetic (instantaneous) trip setting is adjustable. This allows panel builders and electricians to fine-tune the short-circuit response to coordinate with other protective devices in the distribution system.
What type of equipment is the MAL36350 designed to fit?
As a unit-mount (feed-thru) breaker, it is designed for hardwired installation in Square D switchboards, motor control centers (MCCs), and standalone industrial enclosures. It is not compatible with I-Line panelboards, which require a different plug-on mounting bracket.
Is this breaker rated for DC applications?
Yes, the MAL36350 is rated for use in direct current systems up to 250VDC, providing an interrupting capacity of 14kA at that voltage.
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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.