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Square D LHL36125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Square D
LHL36125
Molded Case Circuit Breaker
Brand
Square D
SKU
LHL36125
Quantity
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Square D LHL36125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Delivering robust 3-phase protection, the Square D LHL36125 functions as a 125A molded case circuit breaker. It utilizes thermal-magnetic trip technology with fixed long-time and adjustable instantaneous (LI) functions for precise overcurrent response. This unit mount MCCB is built for legacy Square D L-Frame enclosures and panelboards. When upgrading, it is replaced by the PowerPact HGL36125, requiring a frame change or retrofit kit. The breaker features a 65kAIC rating at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | LHL36125 |
| Series | LHL |
| Amperage | 125A |
| 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, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
4 answersWhat are the wire size requirements for the LHL36125 lugs?
The standard mechanical lugs on the LHL36125 are dual-rated for aluminum or copper conductors. Each lug can accept either a single wire ranging from 1 AWG to 600 kcmil, or two wires ranging from 1 AWG to 250 kcmil per phase.
Can the LHL36125 unit-mount breaker be converted for use in an I-Line panelboard?
No. Unit-mount breakers like the LHL36125 cannot be field-modified with I-Line jaws. You must use a factory-assembled I-Line breaker for I-Line panelboard applications.
How does the adjustable magnetic trip work on this breaker?
The LHL36125 features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element. The magnetic dial allows you to fine-tune the instantaneous short-circuit pickup to coordinate with specific load requirements.
Is the Square D LHL36125 still actively manufactured?
The LHL36125 is a legacy L-Frame breaker that was officially discontinued by Schneider Electric in early 2021. It is typically sourced as a direct replacement part for existing switchboards and enclosures.
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