Square D HJL Series Circuit Breakers
The Square D HJL series is a PowerPact H-Frame molded case circuit breaker with lug/unit-mount terminations, rated for 250A frame size and 600VAC operation. HJL breakers are the lug-mount equivalent of the HJA I-Line series.
Series Specifications
| Frame | H-Frame (PowerPact) — 250A Frame |
|---|---|
| Amperage Range | 15A – 250A |
| Voltage | 600VAC |
| Poles | 2-Pole & 3-Pole |
| Interrupting Rating | 25kA @ 600V / 65kA @ 480V / 100kA @ 240V |
| Mounting | Lug / Unit Mount |
| Trip Type | Thermal Magnetic |
History and Replacement Context
The HJL series was developed alongside the HJA to serve applications where I-Line plug-in mounting was not required.
Typical Applications
- Commercial distribution panels (unit mount)
- Industrial branch circuits
- Motor feeder protection
- Standalone enclosure applications