Free Shipping Over $99
Square D MHL36450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Unit Mount
Square D
MHL36450
Molded Case Circuit Breaker
Brand
Square D
SKU
MHL36450
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D MHL36450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D MHL36450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MHL36450 |
| Series | MHL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | MHL |
|---|---|
| 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, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Quantity
Square D MHL36450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MHL36450 |
| Series | MHL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | MHL |
|---|---|
| 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, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Similar Items
600A 3 Pole Molded Case Circuit Breaker
700A 3 Pole Molded Case Circuit Breaker
Description
Delivering robust 450A overcurrent protection, this unit mount molded case circuit breaker utilizes fixed thermal and adjustable magnetic trip settings. The M-frame design is engineered to handle demanding commercial and industrial electrical loads with precision. Designed for integration into Square D switchboards and motor control centers, it utilizes standard lug terminals. Facilities looking to upgrade can transition to the newer PowerPact MJL36450 series. Rated 65kA at 480VAC for safety.Specifications
| Brand | Square D |
|---|---|
| Part Number | MHL36450 |
| Series | MHL |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | MHL |
|---|---|
| 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, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Product FAQs
7 answersIs the MHL36450 still manufactured, or is there a modern replacement?
The MHL36450 is a legacy M-frame circuit breaker. Facilities looking to upgrade to a current model can transition to the Square D PowerPact MJL36450, which serves as the modern equivalent with a matching 65kA at 480V interrupting capacity.
What is the wire size range for the lugs on this breaker?
The standard lugs on the MHL36450 accept three conductors per phase, with a wire range of 3/0 AWG to 500 kcmil for both aluminum and copper wire.
What is the adjustable magnetic trip range for the MHL36450?
The instantaneous magnetic trip on this 450A breaker is adjustable, with a setting range from 2250A to 4500A to allow for precise short-circuit protection coordination.
What types of enclosures or equipment is this breaker designed to fit?
This unit-mount M-frame breaker is designed for integration into compatible Square D switchboards, motor control centers, and individual industrial enclosures.
Does this breaker mount to an I-Line panelboard bus?
No, the MHL36450 features a feed-thru, unit-mount design with standard line and load lugs. It is not compatible with I-Line panelboards, which require plug-on I-Line style breakers.
What does the LI trip function code indicate on this breaker?
The LI code means the thermal-magnetic trip unit includes Long-Time protection for overloads and Instantaneous protection for short circuits. The thermal element is fixed, while the magnetic element is adjustable.
Is this breaker rated for use in direct current applications?
Yes, in addition to its 600VAC rating, the MHL36450 is rated for up to 250VDC with an interrupting capacity of 50kA, making it suitable for industrial DC power systems.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.