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Square D LHL36175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Unit Mount
Square D
LHL36175
Molded Case Circuit Breaker
Brand
Square D
SKU
LHL36175
Quantity
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Square D LHL36175 - 175A 3 Pole Molded Case Circuit Breaker
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Quantity
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Description
Built for industrial applications, the LHL36175 is a 175A, 3-pole molded case circuit breaker from Square D. It delivers reliable power distribution for demanding environments. Featuring a unit mount configuration, it fits into compatible Square D enclosures. For modern upgrades, it is replaced by the JGL36175, which necessitates a frame retrofit. This breaker offers a 35 kAIC capacity at 480VAC. It utilizes a thermal-magnetic trip unit with long-time and instantaneous (LI) protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | LHL36175 |
| Series | LHL |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 50kA @ 250VDC |
| Frame Type | LHL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 1 AWG-600 kcmil (Al/Cu) or (2) 1 AWG-250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 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 (AL400LA) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
5 answersWhat wire sizes are compatible with the standard lugs on the LHL36175?
The factory lugs can accommodate either a single 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors per phase. Both aluminum and copper wires are supported.
Can I install the LHL36175 in a Square D I-Line panelboard?
No. The LHL36175 is a unit mount, feed-thru breaker. It bolts directly to the mounting surface and requires cable connections on both the line and load sides. It lacks the plug-on jaw connections required for I-Line panelboards.
How does the adjustable magnetic trip function work on this breaker?
While the thermal overload protection is fixed, the magnetic instantaneous trip is adjustable. This allows electricians to dial in the short circuit response threshold to better coordinate with downstream breakers and prevent nuisance tripping from motor inrush currents.
Is the Square D LHL36175 considered a legacy breaker?
Yes, the LHL frame is part of Square D's legacy molded case circuit breaker family. It is primarily sourced to maintain or expand existing switchboards and enclosures rather than for new construction, which typically utilizes the newer PowerPact series.
What safety procedures apply when installing this L-Frame breaker?
Installation must be performed by a licensed electrician. Ensure the panelboard or switchboard is fully de-energized, verify zero energy with a calibrated multimeter, and wear the required PPE as outlined by NFPA 70E before beginning the replacement.
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