Product Identification and Key Ratings
The Siemens 5SM3616-0KL is a SENTRON 5SM3 series residual current operated circuit breaker (RCCB), 2-pole, type AC, with a rated current of 63 A and a rated residual tripping current of 300 mA at a rated AC supply voltage of 230 V. The 300 mA residual current rating means this device is designed for protection against fire hazard due to earth leakage currents, not for personal shock protection (which typically requires 30 mA). It is suited for circuits where a higher leakage threshold is acceptable, such as distribution sub-mains or equipment with inherent leakage. The 63 A rated current and 230 V AC rating position this RCCB for use as a main or sub-main protective device in single-phase (2-wire) AC circuits within a standard low-voltage distribution board.
Mounts on DIN rail (REG) per the standard 35 mm profile. Installation depth is 70 mm, and the device occupies 2.5 width units (approx. 45 mm) on the rail. Mounting position is any, and supply connection can be top or bottom, offering flexibility in panel layout. The N terminal is on the left side of the device (N left). Verify this orientation against your panel's busbar or wiring scheme before committing the BOM line, as it affects the physical routing of the neutral conductor. Tightening torque for the screw-type terminals is specified at 2.5 to 3 N·m. For audit purposes, this torque range must be observed and documented during installation to maintain the manufacturer's warranty and the device's short-circuit rating.
Rated for an ambient temperature range of -5 to +45 °C during operation, with a storage and transport range of -40 to +75 °C. The device is finger and back-of-hand safe for shock protection. The device is silicon-free, which is relevant for applications in environments sensitive to silicone outgassing, such as certain paint or coating lines.