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Square D MAL36900 Molded Case Circuit Breaker
- 900A
- 3 Pole
- Unit Mount
Square D
MAL36900
Molded Case Circuit Breaker
Brand
Square D
SKU
MAL36900
Quantity
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Square D MAL36900 - 900A 3 Pole Molded Case Circuit Breaker
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Quantity
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Square D MAL36900 - 900A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36900-R |
| Series | MAL |
| Amperage | 900A |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Square D MAL36900 - 900A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MAL36900-R |
| Series | MAL |
| Amperage | 900A |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Description
Built for demanding industrial environments, the Square D MAL36900 is a 900A, three-pole molded case circuit breaker from the legacy M-Frame family. It is designed for unit mounting within compatible Square D switchboards and motor control centers. This breaker provides reliable thermal magnetic protection with Long-Time and Instantaneous (LI) trip functions, delivering a 42kAIC rating at 240VAC. For modern system upgrades, this unit is replaced by the PGL36100 with an adjusted trip setting.Specifications
| Brand | Square D |
|---|---|
| Part Number | MAL36900-R |
| Series | MAL |
| Amperage | 900A |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL900MA) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersIs the Square D MAL36900 still in active production?
The MAL36900 is a legacy M-Frame circuit breaker and is considered obsolete by the manufacturer. For modern equivalents or panel upgrades, Schneider Electric has replaced this line with the PowerPacT M-Frame and P-Frame circuit breaker series.
Can the MAL36900 be reverse-fed?
Yes, standard Square D thermal-magnetic circuit breakers like the MAL36900 do not have specific Line and Load markings, meaning they can be safely backfed for use as a main breaker in compatible panel applications.
What is the recommended lug torque for the MAL36900?
When using the standard AL900MA mechanical lug kit for this breaker, which accepts three 3/0 AWG to 500 kcmil conductors, the manufacturer specifies a tightening torque of 300.9 lb-in (34 N.m).
How does the trip unit operate on the MAL36900?
This breaker utilizes a thermal-magnetic trip unit with LI (Long-Time and Instantaneous) functions. It features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection.
Can the MAL36900 circuit breaker be used on direct current (DC) systems?
Yes, in addition to alternating current applications up to 600VAC, this breaker is rated for use on 250VDC systems with a 14kA interrupting capacity.
Will this breaker plug into an I-Line panelboard?
No, the MAL36900 is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the chassis in Square D switchboards and motor control centers rather than plugging onto an I-Line bus.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
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Rating
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