Overview
The Square D QON318L200 is a QO series load center interior designed for 3-phase electrical distribution panel installations. Providing 18 circuit spaces and 200-amp main lugs, this mounting base accepts QO circuit breakers and connects directly to the service conductors without a main breaker — suitable for applications where the disconnect means is provided upstream. The OEM designation identifies this as a direct-fit interior for compatible QO load center enclosures.
Features
- 18-space capacity for QO series circuit breakers
- 200-amp main lugs for direct service conductor connection
- 3-phase configuration for commercial and industrial distribution
- Mounting base design for installation in compatible QO load center enclosures
- OEM specification for direct replacement or new installation use
- Part of the Square D QO circuit breaker system
Specifications
| Specification | Value |
|---|---|
| Series | QO |
| Type | Load Center Interior — Mounting Base |
| Phase | 3 |
| Spaces | 18 |
| Main Ampere Rating | 200A |
| Main Device | Main Lugs |
| Model | QON318L200 |
| UPC | 78590186825 |





