Square D FDL Series Circuit Breakers
The Square D FDL series is a high-interrupting F-Frame molded case circuit breaker rated for 100A frame size and 600VAC operation. FDL breakers offer higher interrupting capacity than the standard FAL series, making them suitable for applications with higher available fault current.
Series Specifications
| Frame | F-Frame — 100A Frame |
|---|---|
| Amperage Range | 15A – 100A |
| Voltage | 600VAC |
| Poles | 2-Pole & 3-Pole |
| Interrupting Rating | 18kA @ 600V / 35kA @ 480V / 65kA @ 240V |
| Mounting | I-Line Plug-In |
| Trip Type | Thermal Magnetic (High Interrupting) |
History and Replacement Context
The FDL series was developed as a higher-interrupting version of the FAL for use in commercial and light industrial applications where available fault current exceeded the standard FAL's 14kA rating.
Typical Applications
- High-fault commercial distribution
- Branch circuit protection in industrial settings
- Commercial distribution panels near transformers
- Motor branch circuit protection