2CSR275075R3404

The ABB DSB201 M AC-C40/0.3, product code 2CSR275075R3404, is a residual current circuit breaker with overcurrent protection (RCBO) designed to provide combined protection against overloads, short circuits and earth-leakage faults in compatible low-voltage electrical installations.

The device has a rated current of 40 A, a C-type tripping characteristic and a rated residual operating current of 300 mA (0.3 A). Its Type AC residual-current detection is designed to respond to sinusoidal alternating residual currents. The 1P+N configuration is intended for compatible single-phase electrical circuits. Its compact two-module design supports DIN-rail installation in electrical distribution boards and control panels.

This RCBO is suitable for residential, commercial and industrial electrical distribution applications where the current rating, leakage sensitivity and breaking capacity meet the installation requirements. The 300 mA residual-current setting is generally used for installation or equipment protection and does not replace 30 mA additional protection against electric shock where required. Selection and installation should follow ABB's technical documentation and applicable electrical standards.