WCU1-40 Single Phase AC SPD 40kA | Westhomes Low Voltage Protection
Westhomes WCU1-40 AC surge arrester delivers 40kA protection for 385/275VAC systems. Compact DIN rail design, flame-retardant build & seamless module replacement.
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WCU1-40 Single Phase AC SPD 40kA
Westhomes WCU1-40 AC surge arrester delivers 40kA protection for 385/275VAC systems. Compact DIN rail design, flame-retardant build & seamless module replacement.
Westhomes WCU1-40 AC SPD: 40kA surge protection for 385/275VAC single-phase systems. DIN rail mounting, flame-retardant material & 28 years of low-voltage expertise.
Key Features：
40kA Surge Protection Capacity: Delivers up to 40kA maximum discharge current to shield AC electrical equipment from voltage spikes and lightning strikes.
35mm DIN Rail Mounting: Standard DIN rail installation (matching product design in images) for quick, space-saving setup in electrical panels and enclosures.
28 Years of Manufacturing Expertise: Backed by Westhomes’ decades of low-voltage electrical component experience, ensuring reliable and industry-proven performance.
Enhanced Safety Features: Flame-retardant material, short circuit/overload protection, and high/low temperature resistance for durable operation in harsh environments.
Applications:
Household Electrical Systems
Photovoltaic AC Side Systems
Light Industrial Facilities
Main Technical Parameters
| Model | Rated Voltage(Uo) | Maximum sustained voltageUc(V) | Protection levelUP(KV) | Maximum Current Imax(ka) | Nominal Discharge Current In(ka) | Response Time Ns | TEMP℃ |
| WCU8-D/10 | 230V/400V | 385 | 0.7/10 | 10 | 5 | <25 | -40~+80℃ |
| WCU8-D/20 | 1.5 | 20 | 10 | ||||
| WCU8-C/30 | 2.0 | 30 | 15 | ||||
| WCU8-C/40 | 2.0 | 40 | 20 | ||||
| WCU8-B/60 | 2.3 | 60 | 30 | ||||
| WCU8-B/80 | 3.3 | 80 | 40 | ||||
| WCU8-B/100 | 3.3 | 100 | 60 | ||||
| N-PE | 275/320 | 1.0/1.5 | 20/40/60 | <100 |
Packaging and delivery
| Selling Units | Single item |
Lead time
| Quantity (pieces) | 1 – 1,000 | > 1,000 |
| Lead time (days) | 30 | To be negotiated |
Key attributes
| Max Discharge Current | 40 kA |
| Application | Electronic Equipment, Industrial, Lightning Protection, Power System, Solar System |
| Model Number | WCU1-40 |
| Brand Name | Westhomes |
| Type | T2 |
| Material | Plastic |
| Place of Origin | Zhejiang, China |
155 MBFREQUENTLY ASKED QUESTION (FAQ)
What is the Westhomes WCU1-40 Single Phase AC SPD 40kA?
The Westhomes WCU1-40 Single Phase AC SPD 40kA is a surge protection device designed to protect single-phase AC electrical systems from transient overvoltages caused by lightning strikes, switching operations, and power disturbances. It helps reduce the risk of damage to electrical equipment and improve system reliability.
What does 40kA mean in the WCU1-40 SPD?
40kA refers to the maximum discharge current capability of the surge protection device. It indicates that the SPD can safely handle surge currents up to 40kA under specified test conditions, providing strong protection against transient overvoltage events.
What applications are suitable for the WCU1-40 Single Phase AC SPD?
The WCU1-40 is suitable for residential, commercial, and industrial single-phase AC applications, including distribution boards, electrical panels, control cabinets, and power supply systems requiring surge protection.
What type of surge protection does the WCU1-40 provide?
The WCU1-40 provides protection against transient overvoltages caused by indirect lightning effects, grid disturbances, and switching operations. It limits surge voltage levels and diverts excessive surge current safely to the ground.
What is the difference between an SPD and a circuit breaker?
An SPD protects electrical equipment from transient voltage surges, while a circuit breaker protects circuits from overcurrent conditions such as overloads and short circuits. These two devices provide different types of protection and are often used together in electrical systems.
Where should the WCU1-40 AC SPD be installed?
The WCU1-40 is typically installed in the main distribution board or electrical panel of a single-phase power system. The installation location depends on the system design, protection requirements, and applicable electrical standards.
Can the WCU1-40 SPD protect household appliances?
Yes. When correctly installed, the WCU1-40 can help protect household appliances and electrical equipment from transient overvoltages caused by lightning-induced surges and power switching events.
What is the difference between Type 1, Type 2, and Type 3 SPD?
Type 1 SPD is designed to handle high-energy lightning currents and is usually installed at the service entrance of buildings. Type 2 SPD provides protection against induced surges and switching overvoltages in distribution systems. Type 3 SPD is used for additional protection near sensitive electronic equipment.
How does the WCU1-40 Single Phase AC SPD work?
The WCU1-40 works by detecting sudden voltage surges and providing a low-resistance path to discharge excessive surge energy safely to the earth. This helps limit the overvoltage level and protect connected electrical equipment.
Why choose the Westhomes WCU1-40 Single Phase AC SPD 40kA?
The Westhomes WCU1-40 combines reliable surge protection performance, 40kA discharge capacity, and compact installation for single-phase AC systems. It is an effective solution for protecting electrical installations against transient overvoltage risks.
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