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- - Allen‑Bradley 1489-A1C200 Miniature Circuit Breaker
    
    Product Overview
    
    Single-pole miniature circuit breaker from Bulletin 1489-A series, C trip curve with 20 A rated current. It provides overload and short-circuit protection for medium-to-high power branch circuits inside industrial control cabinets, ideal for protecting control transformers, multiple solenoid manifolds, small auxiliary motors and various inductive loads with large startup inrush.
    
    Core Specifications
    
    Poles: 1-pole
    
    Rated nominal current: 20 A
    
    Trip characteristic: C curve, optimized for inductive loads with high inrush current at startup
    
    Rated operational voltage: 240 VAC / 48 VDC
    
    Short-circuit breaking capacity: 10 kA @ 240 VAC
    
    Terminal type: Screw terminals, compatible with 24–12 AWG copper conductors
    
    Mounting: Standard 35 mm DIN rail mounting
    
    Operating ambient temperature: -20 ℃ ~ +60 ℃
    
    Protection mechanism: Dual thermal-magnetic protection; delayed thermal trip for overloads, instantaneous electromagnetic trip for short circuits
    
    Status indicator: Mechanical visual flag to clearly show ON, OFF or tripped state
    
    Certifications: UL, cUL, CE certified; IP20 rating for indoor cabinet installation only
    
    Main Functions
    
    Overload protection: Automatically disconnect power under sustained overcurrent to avoid cable overheating and insulation degradation
    
    Short-circuit protection: Instantly cut off the circuit upon short-circuit faults to prevent equipment damage and fire risks
    
    Manual isolation function: Acts as a branch disconnect switch to fully cut power for safe maintenance and wiring modification
    
    Safeguard medium-power loads such as heavy-duty control transformers, multi-valve solenoid groups and auxiliary pump/fan motors
    
    Key Advantages
    
    Slim compact body reduces cabinet space occupation. C curve characteristic avoids nuisance tripping triggered by high inrush current from coils and transformers during startup. Visible mechanical trip indicator speeds up on-site fault diagnosis. Plug-on DIN rail design supports fast replacement without reworking wiring. Integrated dual thermal-magnetic protection delivers full-range safety protection for branch circuits.
    
    Typical Applications
    
    Heavy-duty control transformer branch protection, multi-solenoid valve bank power circuits, auxiliary pump and fan load protection, secondary distribution loops in large automation panels, medium-power auxiliary control circuits for packaging, metallurgy and material handling equipment