Thomas & Betts GFB250 Miniature Circuit Breakers (MCBs) Nsb

Description:

The Thomas & Betts GFB250 Miniature Circuit Breaker (MCB) is used to provide reliable overload and short-circuit protection for low-voltage electrical distribution systems in commercial and industrial applications. Commonly installed in panelboards, load centers, branch circuits, lighting systems, HVAC equipment, and OEM electrical control panels requiring dependable circuit protection. Maintenance electricians, facility managers, OEM manufacturers, and system integrators use this circuit breaker for new installations, preventive maintenance, equipment upgrades, and replacement of existing GFB Series breakers.

Applications:

The Thomas & Betts GFB250 is designed to protect single-phase branch circuits from overload and fault conditions while providing a convenient means of manual circuit isolation. Its plug-in design allows quick installation into compatible load centers and panelboards, making it suitable for commercial buildings, industrial facilities, machine control panels, lighting circuits, HVAC systems, and general-purpose electrical distribution where thermal-magnetic protection is required.

Technical Specifications:

• Brand: Thomas & Betts (ABB)
• Part Number: GFB250
• Product Type: Miniature Circuit Breaker (MCB) / Molded Case Circuit Breaker
• Series: GFB Series
• Number of Poles: 2
• Current Rating: 50 A
• Voltage Rating: 120/240 VAC
• Phase: Single Phase
• Interrupting Capacity (AIC): 10 kA @ 240 VAC
• Trip Unit: Thermal-Magnetic
• Trip Functions: Long-Time and Instantaneous (LI)
• Mounting Type: Plug-In
• Connection Type: Plug-In Bus Connection
• Operating Temperature Calibration: 40°C
• Typical Applications: Panelboards, Load Centers, Branch Circuit Protection, HVAC Equipment, Industrial Control Panels, Commercial Electrical Distribution
• Product Status: Discontinued / Obsolete

Common Replacements:

• Thomas & Betts GFB230
• Thomas & Betts GFB260
• Thomas & Betts GFB270