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- - Allen‑Bradley 1489-A1C050 Miniature Circuit Breaker
    
    Product Overview
    
    Single-pole miniature circuit breaker from Bulletin 1489-A series, C trip curve with 5A rated current. Used for overload and short-circuit protection of low-power branch circuits inside industrial control cabinets, protecting PLC power supplies, sensors, relays, solenoid valves and other control loads.
    
    Core Specifications
    
    Poles: 1-pole
    
    Rated current: 5 A
    
    Trip characteristic: C curve (for inductive loads with high startup inrush current)
    
    Rated voltage: 240 VAC / 48 VDC
    
    Short-circuit breaking capacity: 10 kA at 240 VAC
    
    Terminals: Screw terminals, compatible with 24–12 AWG wires
    
    Mounting: Standard 35 mm DIN rail
    
    Operating temperature: -20 ℃ ~ +60 ℃
    
    Protection mechanism: Thermal overload trip + electromagnetic instantaneous short-circuit trip
    
    Status indicator: Mechanical flag showing ON / OFF / tripped status
    
    Certifications: UL, cUL, CE certified; IP20 indoor cabinet use only
    
    Main Functions
    
    Thermal overload protection: Automatically disconnect power under sustained overcurrent to prevent cable overheating and insulation damage
    
    Instant short-circuit protection: Fast trip upon short-circuit faults to avoid equipment burnout and fire risks
    
    Manual isolation function: Can be used as a disconnect switch to cut power safely during maintenance
    
    Safeguard sensitive low-power control components such as power supplies, transmitters and small auxiliary circuits
    
    Key Advantages
    
    Ultra-narrow compact housing saves cabinet space. C curve design avoids false tripping caused by coil and power supply startup surge currents. Visible trip indicator speeds up on-site fault troubleshooting. Plug-in DIN rail structure allows quick replacement without complex wiring. Dual thermal-magnetic protection improves overall circuit safety.
    
    Typical Applications
    
    PLC auxiliary power branch protection, sensor & transmitter power supply circuits, relay interlock loop protection, small fans, indicator lamps and solenoid valve load protection, secondary distribution circuits inside automation control cabinets