Siemens SENTRON 5SV3321-4 RCCB Type B, 16 A, 30 mA, 2-pole, 230 V, short-time delayed

The Siemens SENTRON 5SV3321-4 is a residual current circuit breaker (RCCB) with Type B residual current detection, which makes it suitable for circuits with smooth DC residual currents or high-frequency AC components. Unlike standard Type A RCCBs, this unit handles the demands of modern loads such as frequency converters, EV chargers, and medical equipment. Its short-time delayed tripping characteristic improves discrimination with downstream protective devices, reducing nuisance tripping in complex installations.

Highlights

• Type B residual current detection for DC and high-frequency AC fault currents
• Short-time delayed tripping for better selectivity
• Rated residual current of 30 mA for personal protection
• Compact 4 TE (72 mm) width for DIN rail mounting
• Rated current of 16 A and rated voltage of 230 V AC

In daily use

The 5SV3321-4 is engineered for reliability in industrial and commercial settings. Its screw terminals accept conductors from 0.75 to 35 mm², ensuring secure connections. With an operating temperature range of -25 to +45 °C and IP20 protection, it performs consistently in typical control cabinet environments. The device meets IEC 61008-1, providing confidence in its safety and performance.

Full specifications

• Product type: Residual Current Circuit Breaker (RCCB)
• Series: SENTRON
• Number of poles: 2 (1-pole + Neutral)
• Rated current (In): 16 A
• Rated residual current (IΔn): 30 mA
• Type of residual current: Type B
• Tripping characteristic: Short-time delayed
• Rated voltage (Un): 230 V AC
• Rated frequency: 50/60 Hz
• Rated short-circuit current (Inc): 10 kA
• Surge current withstand capability: 3 kA
• Mounting type: DIN rail
• Module width: 4 TE (72 mm)
• Degree of protection: IP20
• Operating temperature range: -25 to +45 °C
• Terminal type: Screw terminals
• Terminal capacity (solid): 0.75 - 35 mm²
• Terminal capacity (stranded): 0.75 - 35 mm²
• Standards: IEC 61008-1

Final note

For installations requiring advanced residual current protection with high immunity to nuisance tripping, the Siemens SENTRON 5SV3321-4 is a dependable choice.