The Schneider WATSN125B /4A is a Molded Case Circuit Breaker (MCCB) designed for overcurrent protection in 3-phase electrical circuits. It is part of Schneider Electric's WATSN series, which provides reliable protection for various industrial, commercial, and residential applications.
Parameters:
Rated Current (In): 125A
Poles: 4P (Four-pole configuration for 3-phase systems with neutral protection)
Rated Voltage (Un): 415V AC (standard voltage for 3-phase systems)
Rated Frequency: 50/60Hz
Breaking Capacity (Icu): 25kA (maximum fault current the MCCB can safely interrupt)
Overload Protection: Yes, the WATSN125B /4A provides thermal overload protection, which ensures the breaker trips when the current exceeds the rated value for a prolonged period.
Short Circuit Protection: Yes, it includes magnetic short-circuit protection, which instantly disconnects the circuit in the event of a short circuit.
Insulation Resistance: ≥ 100MΩ (at 500V DC)
Ambient Temperature Range: -25°C to +60°C (suitable for a variety of environmental conditions)
Mechanical Durability: 20,000 operations
Electrical Durability: 4,000 operations (under rated current and short-circuit conditions)
Auxiliary Contacts: Available for remote monitoring or signaling