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Square D MH36450 Molded Case Circuit Breaker
- 450A
- 3 Pole
- I-Line
Square D
MH36450
Molded Case Circuit Breaker
Brand
Square D
SKU
MH36450
Quantity
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Square D MH36450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D MH36450 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MH36450-R |
| Series | MH |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator, Common Trip, Trip-Free Mechanism |
Quantity
Square D MH36450 - 450A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MH36450-R |
| Series | MH |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator, Common Trip, Trip-Free Mechanism |
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Description
The MH36450 is a 450-amp, 3-pole molded case circuit breaker designed by Square D for demanding industrial applications. It provides essential long-time and instantaneous protection for commercial facilities. This legacy M-Frame unit mounts into Square D I-Line panelboards and switchboards. It serves as a reliable replacement component and is superseded by the newer MJA36450. Rated for 600VAC, it features thermal-magnetic trip technology and a robust 65kA interrupting capacity at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | MH36450-R |
| Series | MH |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 14kA @ 250VDC |
| Frame Type | MH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator, Common Trip, Trip-Free Mechanism |
Product FAQs
6 answersWhat type of enclosures are compatible with the MH36450?
This I-Line style plug-in breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It is not compatible with standard unit-mount enclosures or residential load centers.
Is the MH36450 still in active production?
No, the MH36450 is part of the legacy Square D M-Frame family. For modern upgrades or replacements, it is typically superseded by the PowerPact M-Frame series, such as the MJA36450, depending on your specific panel requirements.
What does the H in the MH36450 part number signify?
The H indicates a High interrupting rating. For this M-Frame breaker, it provides a 65kA interrupting capacity at 480VAC, which is higher than standard interrupting models in the same frame size.
What is the magnetic trip adjustment range for this breaker?
The MH36450 features an adjustable magnetic trip function with a nominal range from 2250A on the low setting to 4500A on the high setting. The thermal trip remains fixed at 450A.
How many conductors can the standard lugs on the MH36450 accept?
The standard lugs on this breaker can accept up to three conductors per phase, accommodating wire sizes from 3/0 AWG to 500 kcmil for both aluminum and copper wire.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time protection for standard overloads and Instantaneous protection for short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
Total 5 star reviews: 4 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
4 reviews
- DLDeanna L.Verified BuyerReviewingSquare D MH36800 - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D MH36800 - 800A 3 Pole Molded Case Circuit Breaker
Another satisfied customer.
- SBSteve B.Verified BuyerReviewingSquare D MH36600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/23/26Square MH36600
Breaker was as advertised excellent condition
- SAStewart A.ReviewingSquare D MH38 Panel Board EnclosureI recommend this productRated 5 out of 5 stars3/25/19not at local supply
got what I needed, because it was not available at my local supply house.
- WWWilliam W.ReviewingSquare D MH32 Panel Board EnclosureI recommend this productRated 5 out of 5 stars7/1/18INSIDE THE BOX
Great Buy ! Shipped on time. No Damage. Just what we ordered Thanks