Square D LHL Series Circuit Breakers
The Square D LHL series is a high-interrupting L-Frame molded case circuit breaker rated for 400A frame size and 600VAC operation. LHL breakers provide 65kA interrupting capacity at 480V for high-fault industrial applications.
Series Specifications
| Frame | L-Frame — 400A Frame |
|---|---|
| Amperage Range | 125A – 400A |
| Voltage | 600VAC |
| Poles | 2-Pole & 3-Pole |
| Interrupting Rating | 25kA @ 600V / 65kA @ 480V / 100kA @ 240V |
| Mounting | I-Line Plug-In |
| Trip Type | Thermal Magnetic (High Interrupting) |
History and Replacement Context
The LHL series was developed as the high-interrupting version of the LAL for use in facilities with higher available fault current.
Typical Applications
- High-fault industrial distribution
- Large motor protection in high-fault environments
- Industrial distribution near large transformers
Available Catalog Numbers
- LHL36125 — 125A, 3 pole, 600VAC
- LHL36150 — 150A, 3 pole, 600VAC
- LHL36175 — 175A, 3 pole, 600VAC
- LHL36200 — 200A, 3 pole, 600VAC
- LHL36225 — 225A, 3 pole, 600VAC
- LHL36250 — 250A, 3 pole, 600VAC
- LHL36300 — 300A, 3 pole, 600VAC
- LHL36350 — 350A, 3 pole, 600VAC
- LHL36400 — 400A, 3 pole, 600VAC
- LHL26125 — 125A, 2 pole, 600VAC
- LHL26150 — 150A, 2 pole, 600VAC
- LHL26175 — 175A, 2 pole, 600VAC
- LHL26200 — 200A, 2 pole, 600VAC
- LHL26225 — 225A, 2 pole, 600VAC
- LHL26250 — 250A, 2 pole, 600VAC
- LHL26300 — 300A, 2 pole, 600VAC
- LHL26350 — 350A, 2 pole, 600VAC
- LHL26400 — 400A, 2 pole, 600VAC