Siemens JXD J-Frame Sentron Circuit Breakers
The Siemens JXD series is a J-Frame 400A 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 2-pole and 3-pole from 70A to 400A.
Series Specifications
| Frame | J-Frame 400A Sentron — 400A Frame |
|---|---|
| Amperage Range | 70A – 400A |
| Voltage | 600VAC |
| Poles | 2-Pole & 3-Pole |
| Interrupting Rating | 65kA @ 480V |
| Mounting | Bolt-On |
| Trip Type | Thermal Magnetic |
History and Replacement Context
The JXD series features a non-interchangeable (fixed) trip unit, making it UL listed for reverse-feed applications per UL 489. This is the preferred ordering method for most commercial and industrial feeder applications.
Typical Applications
- Commercial feeder circuits
- Industrial distribution
- Motor control center feeders
- Switchboard applications
- Reverse-feed applications