Product Identification and Core Ratings
The Siemens 5SV4612-0KL is a 2-pole residual current operated circuit breaker (RCCB) from the SENTRON series, designed for instantaneous fault detection. Per the specification, it is rated at 25 A with a 300 mA residual current sensitivity, Type AC, for a 230 V AC supply (N left configuration). The 300 mA sensitivity makes it suitable for general protection against sinusoidal AC earth faults where a higher threshold is acceptable, such as in sub-distribution boards feeding fixed equipment rather than socket-outlet circuits. The unit carries a short-circuit current rating (SCCR) of 10 kA per IEC 61008-1, with a conditional rated short-circuit current of 0.5 kA. This means the device can safely interrupt fault currents up to 10 kA under specified conditions, and is backed by a maximum permissible series fuse of 63 A for backup protection. Operating frequency is fixed at 50 Hz, and the supply voltage range is 230/400 V AC. The minimum test voltage for the integral test circuit is 100 V.
Mechanical Integration and Environmental Limits
The 5SV4612-0KL occupies 2 modular width units (36 mm) on a standard DIN rail (REG) and requires 70 mm installation depth. The housing dimensions are 70 mm depth × 36 mm width × 90 mm height, with a 60 mm grid spacing. Mounting position is any orientation, and the supply cable can enter from top or bottom. Protection class is IP20, applicable only when the distribution board is installed with connected conductors. Ambient operating temperature range is -25 °C to +45 °C, with permissible storage and transport from -40 °C to +75 °C. Overvoltage category is III, suitable for fixed installation downstream of the main distribution board. Mechanical service life is 10,000 operating cycles typical. Supplementary devices can be installed.