Technical Parameters
Electrical Ratings
Rated Current (In): 25 A
Number of Poles: 2P (two poles)
Tripping Curve: B‑curve (for low inrush loads)
Rated Operational Voltage (Ue):
Up to 400 V AC (IEC 60898‑1)
Up to 440 V AC (IEC 60947‑2)
Rated Insulation Voltage (Ui): 440 V
Rated Frequency: 50 / 60 Hz
Rated Short‑Circuit Breaking Capacity (Icn): 10 kA at 230/400 V AC
Rated Ultimate Breaking Capacity (Icu): up to 15 kA
Current Limiting Class: 3
Overvoltage Category: III
Rated Impulse Withstand Voltage (Uimp): 4 kV
Operational Voltage Range: AC/DC 12 V to AC 440 V (typical)
DC Interrupting Capability: Up to 125 V DC (depending on certification)
Mechanical & Installation
Mounting: Standard DIN‑rail (35 mm)
Terminal Type: Screw terminals
Tightening Torque: Approx. 2 N·m
Mechanical Endurance: ~20,000 operations
Electrical Endurance: ~20,000 AC cycles
Contact Position Indication: ON (red) / OFF (green)
Housing Material: High‑quality insulation (light grey)
Environmental
Ambient Operating Temperature: approx. −25 °C to +55 °C
Pollution Degree: 3
Protection Rating: IP20 (installed within enclosure)
Mounting Position: Any
The ABB S202‑B25 is a compact 2‑pole miniature circuit breaker from the ABB System pro M (S200) series, engineered to provide reliable overload and short‑circuit protection in low‑voltage electrical distribution systems. It combines a thermal trip for extended overload protection and a magnetic trip for fast response to short circuits.