NGB3B025B - 25A Circuit Breaker

NGB3B025B - 25A Circuit Breaker

The Siemens NGB3B025B is a high-performance, low-voltage circuit breaker designed to provide reliable protection for electrical systems in commercial and industrial applications. As part of the robust NGB frame series, this 25-amp, 3-pole breaker features a thermal-magnetic trip unit, ensuring precise overload and short circuit protection. With a standard breaking capacity, it is built to handle demanding environments, making it an ideal choice for panelboard mounting in various settings. The NGB3B025B adheres to stringent safety standards, being UL listed, and boasts versatile installation with load-side lugs accommodating wire sizes ranging from 14 to 10 AWG, suitable for both copper and aluminum conductors.

Key Features and Benefits

• Thermal-Magnetic Trip Unit: Offers dual-function protection by combining thermal overload response with instantaneous magnetic response for short circuits, ensuring your electrical system is safeguarded against a wide range of potential faults.
• High Breaking Capacity: With a breaking capacity of 14kAIC at 600Y/347V and 25kAIC at 480Y/277V, the NGB3B025B is equipped to manage significant electrical faults, providing enhanced safety and minimizing the risk of electrical fires.
• Versatile Wire Compatibility: Accommodates 14-10 AWG wires, supporting both copper and aluminum conductors, offering flexibility in installation and application.
• Compact Design: The space-saving dimensions (3" W x 5.4" H x 2.8" D) ensure easy fitting into standard panelboards, making it an excellent choice for upgrades and new installations alike.

Technical Specifications

• Amperage: 25A
• Poles: 3
• Breaking Capacity: 14kAIC at 600Y/347V; 25kAIC at 480Y/277V
• Trip Unit: Thermal-Magnetic
• Wire Range: 14-10 AWG (Copper/Aluminum)
• Dimensions: 3" Width x 5.4" Height x 2.8" Depth
• Weight: 2.615 lbs
• Mounting: Panelboard

Material Compliance and Certifications

• The Siemens NGB3B025B circuit breaker is fully compliant with the RoHS directive, effective since July 1, 2006, ensuring that it meets all environmental and safety standards by restricting the use of hazardous substances in electrical and electronic equipment.
• This product adheres to the UL (Underwriters Laboratories) listing requirements, providing peace of mind with verified quality and safety.
• It is also aligned with the REACH regulations under Article 33, which ensures that it is free from any Substances of Very High Concern (SVHC) that could impact health or the environment.

Suitability

• The NGB3B025B is perfectly suited for a variety of applications within commercial and industrial settings. Its robust design and high breaking capacity make it ideal for protecting critical circuits in office buildings, manufacturing plants, and other facilities requiring reliable electrical system management.
• This circuit breaker’s compact size and compatibility with both copper and aluminum wires provide versatile installation options, making it a preferred choice for both retrofit projects and new installations in modern electrical infrastructure.