ABB SH203-C20 miniature circuit breaker

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1. Key Parameters

• Product Model: SH203-C20
• Product Series: ABB SH200-Series Industrial Miniature Circuit Breakers (Low-Voltage Circuit Protection)
• Core Function: Overload protection; short-circuit protection; circuit isolation; fault indication; low-voltage system compatibility.

2. Core Features

• Precise Protection: Type C tripping curve (trips at 5-10×In for short circuits) balances sensitivity and anti-interference, suitable for mixed resistive-inductive loads.
• 3-Pole Safety: 3-pole configuration provides full isolation for 3-phase low-voltage circuits (e.g., small 3-phase motors), avoiding single-phase faults.
• Easy Integration: DIN rail mounting fits ABB standard control cabinets, enabling quick installation and circuit layout optimization.
• Intuitive Status: Toggle switch position (ON/OFF/tripped) clearly indicates circuit status, simplifying fault troubleshooting.

3. Application Fields

• Industrial Control Cabinets: Protects ABB PLC power loops and I/O module circuits from overload/short circuits in manufacturing plants.
• Small Motor Circuits: Guards 3-phase small motors (≤4kW) in ABB-integrated equipment (e.g., conveyor motors, pump motors) against current surges.
• Building Low-Voltage 配电: Supplies branch circuit protection for lighting and small electrical loads in industrial workshops or commercial buildings.
• Auxiliary Power Systems: Protects auxiliary power loops (e.g., sensor power, HMI power) in ABB DCS or remote control stations.

The structure and details of the product：

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