Siemens MXD M-Frame Sentron Circuit Breakers
The Siemens MXD series is an M-Frame 800A Sentron molded case circuit breaker with non-interchangeable trip unit, rated for 600V and 65kA interrupting capacity. UL listed for reverse-feed applications. Available in 3-pole from 300A to 800A.
Series Specifications
| Frame | M-Frame 800A Sentron — 800A Frame |
|---|---|
| Amperage Range | 300A – 800A |
| Voltage | 600VAC |
| Poles | 3-Pole |
| Interrupting Rating | 65kA @ 480V |
| Mounting | Bolt-On |
| Trip Type | Electronic Trip |
History and Replacement Context
The MXD series features a non-interchangeable (fixed) trip unit, making it UL listed for reverse-feed applications per UL 489. Preferred for large main breaker and feeder applications.
Typical Applications
- Large commercial main breakers
- Industrial feeder protection
- Switchboard applications
- Motor control center mains
- Reverse-feed applications