The Siemens NJX3B250 is a VL Series molded case circuit breaker designed for low-voltage applications requiring reliable overcurrent protection. Featuring a thermal-magnetic trip unit and a non-interchangeable trip, this breaker ensures safe operation in industrial and commercial electrical distribution systems. With a normal breaking capacity and compliance with multiple international standards, it provides secure and efficient circuit protection in various power applications.
Technical Specifications
- Model: NJX3B250
- Alternate Part Number: 3VL4140-3RR30-0AA0
- Series: VL Series Molded Case Circuit Breaker
- Frame Type: NJG Frame
- Rated Current: 250A
- Number of Poles: 3
- Interrupting Capacity:
- 25 kAIC at 600V
- 35 kAIC at 480V
- Trip Unit Type: Thermal-magnetic trip unit
- Trip Configuration: Non-interchangeable trip
- Voltage Rating: Up to 600V AC
- Standards Compliance: UL, CSA, NOM, IEC, CE, CCC
- Dimensions: 5.5” W x 11” H x 4.2” D
Key Features
- Molded case circuit breaker with a compact and modular design
- Thermal-magnetic trip unit for overcurrent protection
- Non-interchangeable trip for consistent performance
- Normal breaking capacity for industrial and commercial applications
- True RMS current measurement for accurate system monitoring
- Designed to meet global standards, ensuring broad compatibility
- Reliable interrupting ratings of up to 35 kA at 480V AC
Compatible Components & Accessories
- Siemens VL Series electrical distribution panels
- Siemens auxiliary switches and trip units
- Standard electrical mounting and wiring accessories
- Breaker enclosures and protective covers
Industry Applications
- Industrial and commercial power distribution systems
- Electrical protection for manufacturing and processing plants
- Data centers and critical infrastructure power management
- HVAC and facility automation requiring circuit protection
- Power generation and utility distribution networks
Installation & Maintenance Notes
- Verify compatibility with existing electrical distribution systems before installation
- Follow manufacturer guidelines for mounting and wiring configurations
- Periodically inspect for proper operation and trip functionality
- Use Siemens-approved accessories and components for best performance
- Maintenance should be performed by qualified electrical personnel
Series Vl Ul Listed Molded Case Circuit Breaker
With Thermal – Magnetic Trip Unit.
Breaker Njg Frame With Normal Breaking Capacity.
Non Interchangeable Trip.
This part is normally stock.
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