Weidmuller VPU AC II 2 R 300/50 Type II Surge Protection Device
The Weidmuller VPU AC II 2 R 300/50 Type II surge protection device is designed to protect single-phase AC power systems from damaging transient overvoltages caused by indirect lightning strikes and switching operations. Installed at the distribution level, it limits surge energy before it reaches sensitive loads, improving overall system reliability. Optimized for TN networks and DIN-rail mounting, this compact surge protector integrates visual status indication and remote signaling to support preventive maintenance. It is well suited for industrial control panels, commercial buildings, and infrastructure applications where power continuity and equipment protection are essential.
The Weidmuller VPU AC II 2 R 300/50 combines high discharge capability with rapid response to effectively suppress surge events before they propagate through the installation. Its coordinated protection concept reduces interference without complex system separation, simplifying panel design. The built-in remote contact enables condition monitoring, allowing maintenance teams to react early and avoid unplanned downtime. Designed for harsh electrical environments, it supports long service life, stable protection performance, and compliance-driven installations, making it a dependable solution for safeguarding critical power distribution systems.
Why Weidmuller VPU AC II 2 R 300/50?
The Weidmuller VPU AC II 2 R 300/50 is chosen when long-term power reliability matters more than short-term fixes. It combines fast, controlled surge suppression with intelligent status monitoring, allowing engineers to protect equipment while maintaining visibility into system health. Its compact DIN-rail design, coordinated protection concept, and industrial-grade durability make it a smart choice for panels where space, safety, and uptime must all coexist without compromise.
What problem does it solve?
Unexpected voltage surges can silently degrade power supplies, controllers, and automation hardware until failure occurs. The Weidmuller VPU AC II 2 R 300/50 addresses this risk by diverting harmful transient energy away from critical circuits before damage accumulates. It stabilizes electrical networks exposed to switching events or indirect lightning effects, reducing breakdowns, preventing costly downtime, and extending the service life of connected equipment.
Key Features & Specifications – Weidmuller VPU AC II 2 R 300/50 : 2591050000
| Feature | Details | Benefit |
|---|---|---|
| Surge Protection Type | Type II / Type III surge protection device | Protects downstream equipment from transient overvoltages caused by switching and indirect lightning |
| Application Network | Single-phase AC, TN system | Ensures correct protection coordination for common industrial and commercial power networks |
| Rated Voltage (AC) | 230 V | Optimized for standard low-voltage AC distribution systems |
| Maximum Continuous Operating Voltage (Uc) | 300 V AC | Prevents nuisance tripping while maintaining reliable surge suppression |
| Nominal Discharge Current (In) | 20 kA (8/20 μs) | Handles frequent surge events without performance degradation |
| Maximum Discharge Current (Imax) | 50 kA (8/20 μs) | Provides high surge-handling capacity for demanding installations |
| Protection Level (Up) | ≤ 1.5 kV (L/N–PE) | Limits residual voltage to protect sensitive electronic equipment |
| Response Time | ≤ 25 ns | Reacts extremely fast to transient overvoltages, minimizing energy transfer |
| Number of Poles | 2-pole | Suitable for single-phase AC power distribution |
| Remote Signaling Contact | Integrated changeover contact (1 CO, 250 V / 1 A) | Enables remote monitoring and predictive maintenance |
| Status Indication | Optical indicator (green = OK, red = replace) | Allows quick visual inspection and faster maintenance decisions |
| Mounting Method | DIN rail TS 35 | Simple and standardized installation in control cabinets |
| Connection Technology | Screw connection, wide conductor range | Ensures secure wiring and flexible conductor selection |
| Short-Circuit Current Rating (ISCCR) | Up to 50 kA | Maintains protection integrity even under high fault currents |
| Operating Temperature Range | −40 °C to +85 °C | Reliable operation in harsh industrial environments |
| Housing & Protection Degree | Installation housing, IP20 (installed state) | Designed for safe use inside electrical panels |
| Dimensions (W × H × D) | 36 mm × 104.5 mm × 68 mm | Compact footprint saves valuable panel space |
| Compliance & Standards | IEC 61643-11, EN 61643-11, UL 1449, RoHS | Supports globally compliant and certified installations |
Download Weidmüller VPU AC II 2 R 300/50 (2591050000) Datasheet
Commercial Information – Weidmüuller VPU AC II 2 R 300/50
| Commercial Data | Details |
|---|---|
| EAN Number | 4050118599886 |
| Net Weight | 279 g |
The Applications
1. Industrial Automation Control Cabinets
In automated production facilities, control cabinets concentrate PLCs, power supplies, drives, and I/O modules that are vulnerable to sudden voltage spikes. The Weidmüller VPU AC II 2 R 300/50 is installed at the cabinet power entry to absorb transient overvoltages generated by motor switching and inductive loads. Its rapid response minimizes residual voltage before it reaches sensitive electronics, reducing hidden damage over time. Visual status indication and remote signaling support proactive maintenance, helping manufacturers maintain stable production and avoid costly interruptions caused by electrical disturbances.
2. Commercial and Smart Building Power Distribution
Modern buildings rely heavily on automation for lighting, climate control, and security systems. These systems are frequently exposed to voltage disturbances from elevators, air-conditioning compressors, and unstable grid conditions. The Weidmüller VPU AC II 2 R 300/50 protects distribution boards by diverting surge energy away from building controllers. Its compact form factor fits easily into dense panels, while high discharge capacity ensures consistent protection during repeated events. This improves operational reliability and extends the lifespan of building automation equipment.
3. Renewable Energy Grid Interface Panels
Grid-connected renewable energy systems experience frequent electrical stress due to switching operations and fluctuating load conditions. The Weidmüller VPU AC II 2 R 300/50 is used on the AC side of interface panels to protect inverters, monitoring devices, and auxiliary power supplies. By limiting transient voltages quickly and consistently, it reduces cumulative stress on power electronics. The coordinated protection design simplifies panel layouts while supporting long-term system availability in renewable installations operating under variable electrical conditions.
4. Critical Power Systems in Data and Communication Facilities
Data centers and communication facilities demand stable power quality to prevent service disruption. Even short surge events can lead to power supply failures or unexpected system resets. The Weidmüller VPU AC II 2 R 300/50 is deployed in upstream distribution panels to clamp transient overvoltages before they reach critical loads. Its ability to handle repeated surge events, combined with monitoring capability, helps operators maintain uptime and protect sensitive infrastructure supporting continuous digital operations.
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