Weidmüller VPU AC II 4 300/50 prepäťová ochrana 50 kA 4-pólová typ 2 SPD

The Weidmüller VPU AC II 4 300/50 is a high-performance Type 2 surge protective device (SPD) designed for AC power systems. With a maximum discharge current of 50 kA and 4-pole configuration, it provides reliable protection against transient overvoltages in industrial and commercial installations. Suitable for DIN rail mounting, this compact device ensures compliance with IEC 61643-11 standards.

Advantages

Robust varistor technology ensures fast response time (<25 ns) and high surge handling capability. Visual fault indication (green/red) simplifies maintenance. Wide operating temperature range (-40°C to +80°C) and flame-retardant housing guarantee long-term reliability.

Suitable for

• Main distribution boards in industrial facilities
• Commercial building power supplies
• Protection of sensitive electronic equipment

Key specifications

• Type: Type 2 SPD (AC)
• Nominal Voltage (Un): 230/400 V AC
• Max Continuous Operating Voltage (Uc): 300 V AC
• Nominal Discharge Current (In): 20 kA (8/20 µs)
• Max Discharge Current (Imax): 50 kA (8/20 µs)
• Voltage Protection Level (Up): ≤ 1.4 kV
• Number of Poles: 4
• Mounting: DIN Rail (35 mm)
• Degree of Protection: IP20
• Connection Cross-section: 1.5 - 35 mm² (solid), 1.5 - 25 mm² (flexible)
• Standards: IEC 61643-11, EN 61643-11
• Short-circuit Withstand Capability (Isccr): 50 kA (5s)
• Response Time: < 25 ns
• Housing Material: Thermoplastic, flame retardant
• Modular Width: 4 TE (72 mm)

Recommendations

For optimal protection, install this SPD at the main distribution panel. Ensure proper grounding and coordination with downstream SPDs. Regularly check the visual indicator for operational status.