Doepke DRCBO 4 C16/0.03/3N-B SK Residual Current Circuit Breaker with Overcurrent Protection, 16 A, 30 mA, Type B, 4-Pole (3P+N), 10 kA 9948124

Electricians and panel builders working on three-phase installations with non-linear loads—such as frequency converters, EV charging stations, or medical equipment—need reliable protection against both overcurrent and residual currents, including smooth DC fault currents. The Doepke DRCBO 4 C16/0.03/3N-B SK combines a 16 A C-curve miniature circuit breaker and a Type B residual current device in a single 4-module unit, ensuring comprehensive protection in a compact form factor.

Key specifications

• Rated current (In): 16 A
• Tripping characteristic: C
• Rated residual operating current (IΔn): 30 mA
• Residual current type: B (all-current sensitive)
• Number of poles: 4 (3P+N)
• Rated voltage (Un): 230/400 V AC
• Rated frequency: 50/60 Hz
• Rated short-circuit breaking capacity (Icn): 10 kA
• Rated short-circuit breaking capacity (Ics): 10 kA
• Surge current withstand capability: 3 kA
• Number of modules (DIN): 4
• Mounting type: DIN rail (EN 60715)
• Degree of protection: IP20 (terminals), IP40 (installed)
• Operating temperature range: -25 °C to +40 °C
• Terminal capacity: 1.5 - 25 mm² (solid/stranded)
• Energy limitation class: 3
• Rated insulation voltage (Ui): 500 V
• Rated impulse withstand voltage (Uimp): 4 kV
• Standard compliance: EN 61009-1, VDE 0664-20

Why choose it

The DRCBO 4 C16/0.03/3N-B SK offers a space-saving solution by integrating overcurrent and residual current protection in one device. Its Type B residual current detection makes it suitable for circuits with DC fault currents, which are common in modern installations with electronic equipment. The high 10 kA breaking capacity ensures safe interruption even under high fault conditions, while the C-curve characteristic handles moderate inrush currents without nuisance tripping.

Ideal use cases

• Protection of three-phase circuits feeding frequency converters or UPS systems
• EV charging infrastructure requiring Type B residual current protection
• Industrial control panels with mixed loads and potential DC leakage
• Medical locations where reliable fault current detection is critical
• Renovation projects where space in the distribution board is limited

Good to know

The device is designed for DIN rail mounting and occupies 4 modules (72 mm width). It features a rated insulation voltage of 500 V and impulse withstand voltage of 4 kV, ensuring robust isolation. The operating temperature range of -25 °C to +40 °C allows use in a wide range of environments. Terminals accept conductors from 1.5 to 25 mm², providing flexibility for various wiring sizes.