NGB3B025B - 25 Amp Circuit Breaker

NGB3B025B - 25 Amp Circuit Breaker

The Siemens NGB3B025B delivers reliable and precise electrical protection for demanding commercial and industrial environments. Built with a 25‑amp, 3‑pole design and equipped with a thermal‑magnetic trip unit, this breaker responds swiftly to overloads and short circuits—keeping your systems safe and operational. Its compact size and straightforward panelboard mounting make it ideal whether you’re upgrading existing infrastructure or working on a new installation. Designed with safety and versatility in mind, the NGB3B025B is a wise choice when you need consistent performance and peace of mind under heavy-duty use.

Key Features and Benefits

• Dual‑Action Thermal‑Magnetic Trip Unit: Combines thermal overload protection with instantaneous magnetic short‑circuit response, covering a wide range of fault scenarios.
• High Interrupting Capacity: With breaking capacities of 14 kAIC at 600Y/347 V and 25 kAIC at 480Y/277 V, this breaker handles serious faults safely, reducing risk of electrical fires or equipment damage.
• Flexible Wiring Compatibility: Works with both copper and aluminum conductors in the 14–10 AWG range, so you have flexibility when wiring or upgrading circuits.
• Space‑Saving Form Factor: At 3″ W × 5.4″ H × 2.8″ D, its compact size fits neatly into standard panelboards—making it practical for retrofit projects or tight electrical enclosures.
• Durable Performance: Designed to handle industrial workloads, providing dependable protection over the long term under challenging operating conditions.

Technical Specifications

• Amperage: 25 A
  
• Poles: 3‑Pole
  
• Trip Unit: Thermal‑Magnetic
  
• Interrupting Rating:
  • 14 kAIC @ 600Y/347 V
  • 25 kAIC @ 480Y/277 V
• Wire Range: 14–10 AWG (Copper or Aluminum)
  
• Mounting: Panelboard
  
• Dimensions:
  • Width: 3″
  • Height: 5.4″
  • Depth: 2.8″
• Weight: 2.615 lbs
  

Material Compliance and Certifications

• UL-Listed: Assures compliance with strict safety testing for electrical devices.
• RoHS and REACH Compliant: Restricts hazardous substances and avoids substances of very high concern (SVHC), contributing to a safer workplace and environment.

Where It Works Best

• The NGB3B025B shines in commercial buildings, industrial facilities, manufacturing plants, and other heavy-duty electrical installations. It’s an excellent fit for protecting lighting circuits, motor control systems, or general power distribution panels. Whether you are retrofitting older electrical panels or installing brand-new systems, this breaker is particularly well-suited for applications where reliability and safety cannot be compromised.