Description
The Siemens NMX3B800 is a 3-pole thermal magnetic molded case circuit breaker designed for reliable protection of electrical systems up to 800 Amps and 600VAC. It provides dependable overcurrent and short-circuit protection with a 50kA interrupting rating at 480V. Built for industrial and commercial installations, the NMX3B800 ensures stable performance under demanding operating conditions.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Siemens |
| Category |
Power Distribution |
| Part Number |
NMX3B800 |
| Subcategory |
Molded Case Circuit Breaker |
| Series |
VL Series |
| Type |
MG Type |
| Amperage Rating |
800A |
| Voltage Rating |
600VAC |
| Interrupting Rating |
50kAIC at 480V |
| Poles |
3 |
| Phase |
3 |
| Trip Unit |
Thermal Magnetic (Long-Time and Instantaneous) |
| Mounting Type |
Fixed |
| Connection Type |
Bolt-On |
| Frame Type |
MD / 3VL6 |
| Enclosure Type |
IP20 |
| Frequency Rating |
50/60 Hz |
| Temperature Rating |
40°C |
| Country of Origin |
Mexico |
| Dimensions (H x W x D) |
406 mm x 190 mm x 151 mm |
| Weight |
19 lbs (approx.) |
Information About
NMX3B800
The NMX3B800 is part of Siemens’ VL Series molded case circuit breakers, known for their robust construction and high interrupting capacity. It features a thermal magnetic trip unit that offers both long-time and instantaneous protection functions, ensuring precise control over overload and fault currents. With its bolt-on connection and fixed mounting design, the unit simplifies installation in standard panel systems. Engineered for use in three-phase power distribution, it meets stringent industrial safety standards and operates efficiently within a 40°C temperature rating.
Key Features:
- Rated Current: 800A continuous current capacity for heavy-duty circuit protection.
- Voltage Rating: Supports up to 600VAC for broad industrial and commercial use.
- Interrupting Capacity: 50kAIC at 480V for enhanced fault-clearing performance.
- Trip Unit Type: Thermal magnetic trip providing long-time and instantaneous protection.
- Pole Configuration: 3-pole design suitable for three-phase systems.
- Mounting Type: Fixed bolt-on connection for stable and secure installation.
- Frame Type: MD frame for reliable mechanical strength and consistent performance.
- Operating Temperature: Rated for 40°C ambient environments for dependable operation.
The NMX3B800 delivers the reliability and precision required for industrial power distribution and system protection applications.
