$ 114.31
Protect low-voltage power systems with the Weidmuller VPU AC II 3+1 300/50 Type II surge protector for industrial and commercial applications.
The Weidmuller VPU AC II 3+1 300/50 surge protection device is a Type II surge protective solution developed to protect low-voltage AC power distribution systems from transient overvoltages caused by lightning surges and switching disturbances. It is suitable for TN, TT, and IT network configurations and helps prevent damaging voltage peaks from reaching sensitive electrical equipment. With a compact DIN-rail-mounted design, high surge handling capability, and clear visual status indication, this device supports stable and reliable operation in industrial and commercial power installations.
The Weidmuller VPU AC II 3+1 300/50 is designed to manage repeated surge events while maintaining consistent protection across phase and neutral paths. Its rapid reaction to overvoltage conditions helps reduce electrical stress on downstream components, extending the lifespan of control systems, power supplies, and automation hardware. In real-world environments such as industrial control panels and building distribution boards, the built-in status indicator allows maintenance teams to quickly verify operational readiness. This simplifies inspections, supports preventive maintenance strategies, and helps minimize unexpected downtime due to surge-related failures.
Why Weidmuller VPU AC II 3+1 300/50?
The Weidmuller VPU AC II 3+1 300/50 stands out because it combines strong surge-handling performance with a compact, installer-friendly design. It protects all active conductors and the neutral in a single coordinated unit, reducing wiring complexity and space usage inside control panels. The clear visual status indicator simplifies maintenance decisions, while its proven reliability makes it a dependable choice for facilities that demand stable power quality and long-term protection.
What problem does it solve?
This device solves the often overlooked risk of transient overvoltages that silently damage equipment over time. Lightning strikes and switching operations can introduce sudden voltage spikes that degrade insulation, disrupt automation systems, and cause unexpected shutdowns. The Weidmuller VPU AC II 3+1 300/50 intercepts these surges at the distribution level, preventing them from reaching sensitive devices and helping maintain uninterrupted, predictable system operation.
| Feature | Details | Benefit |
|---|---|---|
| Surge Protection Type | Type II / Type III SPD | Provides effective protection against lightning-induced surges and switching transients |
| Protection Concept | 3+1 circuit (L–N / N–PE) | Ensures coordinated protection of phases and neutral for higher system safety |
| Rated System Voltage | 230/400 V AC | Fully compatible with standard low-voltage power distribution systems |
| Maximum Continuous Operating Voltage (Uc) | 300 V (L–PE), 305 V (N–PE) | Maintains stable operation without nuisance tripping under normal conditions |
| Discharge Current (In) | Up to 40 kA (N–PE), 20 kA (L–PE) | Handles repeated surge events reliably in demanding environments |
| Maximum Discharge Current (Imax) | Up to 65 kA (N–PE), 50 kA (L–PE) | Protects installations against high-energy surge events |
| Protection Level (Up) | ≤ 1.5 kV | Limits residual voltage to protect sensitive downstream equipment |
| Response Time | ≤ 25 ns | Reacts extremely fast to transient overvoltages, reducing insulation stress |
| Network Compatibility | TN-C-S, TN-S, TT, IT with N, IT without N | Flexible use across multiple power system configurations |
| Visual Status Indicator | Green = operational, Red = replacement required | Enables quick inspection and proactive maintenance |
| Mounting Method | DIN rail TS 35 | Allows fast and secure installation in control cabinets |
| Housing Design | Compact 4 TE installation housing | Saves valuable panel space |
| Protection Degree | IP20 (installed state) | Suitable for use inside electrical enclosures |
| Operating Temperature Range | −40 °C to +85 °C | Reliable performance in harsh industrial environments |
| Standards Compliance | IEC / EN 61643-11, UL 1449 | Meets international surge protection safety standards |
| Service Life Support | Replaceable arresters available | Reduces downtime and lowers total cost of ownership |
Download Weidmuller VPU AC II 3+1 300/50 (2591080000) Datasheet
| Commercial Detail | Information |
|---|---|
| EAN Number | 4050118599855 |
| Net Weight | 453 g |
Industrial automation panels concentrate sensitive PLCs, motion controllers, I/O modules, and industrial PCs in a confined space. These systems are vulnerable to transient overvoltages generated by lightning activity or the frequent switching of motors and contactors. Installing the Weidmuller VPU AC II 3+1 300/50 at the incoming power point helps absorb surge energy before it reaches control electronics. Its fast response limits voltage peaks that can cause random faults or controller resets. The compact DIN-rail design fits easily into crowded cabinets, while the visual status indicator allows technicians to verify protection status during routine inspections without interrupting production.
Smart buildings rely on automation for lighting, access control, HVAC management, and energy monitoring. These interconnected systems are often exposed to voltage disturbances originating from the utility grid or internal load switching. The Weidmuller VPU AC II 3+1 300/50 is used in main and sub-distribution boards to stabilize incoming power. By clamping transient overvoltages at a controlled level, it helps protect control modules and communication equipment from gradual electrical degradation. Its compatibility with different earthing arrangements makes it suitable for diverse building infrastructures, supporting long-term reliability and reducing maintenance caused by unexplained electronic failures.
Production facilities frequently operate large motors, welding machines, and variable-speed drives that introduce switching surges into the power network. These disturbances can propagate through distribution panels and affect nearby control, safety, and measurement systems. The Weidmuller VPU AC II 3+1 300/50 mitigates this risk by diverting surge currents safely to earth. Its coordinated protection of phase and neutral conductors helps maintain insulation integrity across the system. This results in fewer unexpected shutdowns, reduced damage to sensitive electronics, and more predictable operation in electrically demanding manufacturing environments.
Infrastructure sites such as pumping stations, transport hubs, and water treatment facilities often operate in exposed locations and require continuous availability. Electrical surges can disrupt monitoring systems, automation controllers, and remote communication units essential for safe operation. The Weidmuller VPU AC II 3+1 300/50 provides consistent surge suppression at the power entry point, helping maintain stable voltage conditions during storm activity or grid disturbances. Its wide operating temperature range and robust construction support reliable performance in harsh environments, reducing emergency maintenance and helping operators maintain uninterrupted service delivery.
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