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Square D MH36350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- I-Line
Square D
MH36350
Molded Case Circuit Breaker
Brand
Square D
SKU
MH36350
Quantity
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Square D MH36350 - 350A 3 Pole Molded Case Circuit Breaker
New
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Square D MH36350 - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | MH36350 |
| Series | MH |
| Amperage | 350A |
| 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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Square D MH36350 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | MH36350 |
| Series | MH |
| Amperage | 350A |
| 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
Engineered for industrial applications, the Square D MH36350 is a 3-pole, 350A molded case circuit breaker from the legacy M-Frame family. It provides reliable overcurrent protection for commercial electrical systems. Designed for Square D I-Line panelboards and switchboards, this unit features a plug-on mounting style. It is superseded by the PowerPact MJA36350. Rated for 600VAC, it features thermal-magnetic LI trip technology and delivers a high interrupting capacity of 65kA at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | MH36350 |
| Series | MH |
| Amperage | 350A |
| 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 panelboards accept the MH36350 circuit breaker?
This breaker is compatible with Square D I-Line panelboards and switchboards. It utilizes an I-Line style plug-in mounting system that connects directly to the interior bus assembly.
What wire sizes do the standard lugs on the MH36350 accommodate?
The factory lugs accept up to three conductors per phase, ranging from 3/0 AWG to 500 kcmil. They are rated for both aluminum and copper (Al/Cu) wiring.
How does the thermal-magnetic trip unit operate on the MH36350?
This breaker features an LI (Long-Time, Instantaneous) trip function. The thermal element provides fixed overload protection, while the magnetic instantaneous trip is adjustable, allowing electricians to tune the short-circuit response for specific loads.
Is the MH36350 rated for use in DC power systems?
Yes, in addition to its AC ratings, this breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 14kA at that voltage.
What is the modern replacement for the legacy MH36350 breaker?
The MH36350 is a legacy M-Frame breaker. When upgrading infrastructure, it is typically replaced by the newer Square D PowerPact M-Frame series, though the original MH frame is often sourced for direct, drop-in replacements in existing I-Line panels.
How does the interrupting capacity change between 480V and 600V applications?
The breaker maintains a high interrupting capacity of 65kA at both 240VAC and 480VAC. However, when applied to 600VAC systems, the interrupting rating drops to 25kA.
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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