Siemens - JXD63B400 400A 3-Pole 600V Bolt-On Molded Case Circuit Breaker
Siemens - JXD63B400 400A 3-Pole 600V Bolt-On Molded Case Circuit Breaker
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The Siemens JXD63B400 is a 3-pole, 400-amp thermal magnetic molded case circuit breaker (MCCB) rated for 600VAC with bolt-on mounting. Engineered for heavy industrial and commercial three-phase power distribution, this JXD-frame breaker delivers high-capacity overload and short-circuit protection for large feeder and main circuits. The bolt-on design provides a secure, vibration-resistant installation in compatible Siemens panelboards and switchboards.
Specifications
| Attribute | Value |
|---|---|
| Part Number | JXD63B400 |
| Manufacturer | Siemens |
| Amperage Rating | 400A |
| Voltage Rating | 600VAC |
| Number of Poles | 3 |
| Trip Type | Thermal Magnetic |
| Mount Type | Bolt-On |
| Interrupting Rating | 65kA @ 240V / 35kA @ 600V |
| Standard | UL 489 Listed |
| Frame Series | JXD6 |
Key Features
- Bolt-on design for secure installation in Siemens JXD-frame compatible panelboards
- Thermal magnetic trip for reliable overload and instantaneous short-circuit protection
- 400A high-capacity rating for main and large feeder circuit protection
- 3-pole configuration for three-phase 600V industrial distribution systems
- High interrupting capacity for demanding industrial environments
- UL 489 Listed, NEC compliant
Common Applications
- 400A main and large feeder circuit protection in industrial 600V panelboards
- Heavy manufacturing plant main distribution protection
- Motor control center (MCC) main incoming feeder protection
- Industrial switchboard main circuit breaker applications
- Utility and process industry high-capacity power distribution
Frequently Asked Questions
What is the Siemens JXD63B400?
The Siemens JXD63B400 is a 400-amp, 3-pole, 600V thermal magnetic bolt-on MCCB used as a main or large feeder circuit breaker in heavy industrial and commercial three-phase 600V electrical distribution systems.
What panelboards are compatible with the JXD63B400?
The JXD63B400 uses bolt-on mounting and is compatible with Siemens JXD6-frame panelboards and switchboards. Always verify frame and bus compatibility with your specific equipment before installation.
Is the JXD63B400 in stock?
Yes. Alpha Brokers & Controls stocks the Siemens JXD63B400 in new condition and ships quickly. Contact us for current pricing and availability.