NGB2B025B - 25 Amp Circuit Breaker

NGB2B025B - 25 Amp Circuit Breaker

Protect your electrical system with confidence using the Siemens NGB2B025B 25 Amp circuit breaker. This 2‑pole, thermal‑magnetic breaker is engineered to deliver dependable overload and short‑circuit protection for a wide range of low‑voltage applications. Whether you're outfitting a commercial building's panelboard or upgrading an industrial facility's distribution setup, the NGB2B025B brings peace of mind — safeguarding machinery, wiring, and personnel from electrical hazards. Compact yet powerful, this breaker combines simplicity with performance, offering an ideal balance of safety and practicality for electricians, contractors, and facility managers alike.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Offers dual protection — thermal overload and magnetic short‑circuit interrupt — to help prevent damage to circuits, equipment, or wiring.
• 2‑Pole, 25 Amp Configuration: Provides reliable two‑phase protection, suitable for many commercial and industrial power circuits.
• High Interrupting Capacity: Rated at 14 kAIC at 600Y/347 V and 25 kAIC at 480Y/277 V, giving you dependable fault‑clearing capability under demanding conditions.
• Simple Installation: The breaker uses load-side lugs only (TC1Q1) and accepts 14–10 AWG (copper or aluminum) wiring — making installation straightforward and flexible.
• Compact & Lightweight: At roughly 2″ × 5.4″ × 2.8″ and weighing under 2 pounds, it fits easily into standard panelboards without bulky hardware or heavy support.

Technical Specifications

• Amp Rating: 25 A
• Poles: 2
• Interrupting Ratings:
  • 14 kAIC at 600Y/347 V
  • 25 kAIC at 480Y/277 V
• Mounting Type: Panelboard
• Dimensions:
  • Width: 2.0 inches
  • Height: 5.4 inches
  • Depth: 2.8 inches
• Weight: Approx. 1.889 lbs
• Wire Range: 14–10 AWG (CU/AL), load-side lugs only (TC1Q1)

Material Compliance and Certifications

• RoHS Compliant (Since 07/01/2006): Fully adheres to environmental safety standards by limiting the use of hazardous substances.
• WEEE Directive Compliant: Designed with responsible disposal and recycling in mind, supporting sustainable handling of electrical equipment at the end of life.

Where It Works Best

• The NGB2B025B shines in commercial buildings, light industrial facilities, maintenance rooms, and renovation projects. It's an excellent solution for branch circuits powering lighting, HVAC units, motor loads, small machinery, and general electrical panels. If you're a contractor working on tenant fit‑outs or a maintenance manager upgrading existing panels, this breaker gives you a dependable, code‑ready protection device that fits seamlessly into standard low-voltage installations.