Email:info@weisho.com
Surge protection device manufacturer
WEISHO, as a leading manufacturer of Surge protection devices in the market, not only creates high-quality products with strict processes, but also provides the most competitive prices with its complete supply chain advantages. At the same time, we support OEM manufacturing and personalized customization services to help customers enhance their brand competitiveness and market value.
What are our characteristics
Production technology
Adopting industry-leading manufacturing processes, continuously optimizing production processes, and improving efficiency and accuracy
Customization and OEM/ODM
Supports OEM/ODM services and can provide customized solutions according to your needs, including rated current, brand identification, etc
High performance-price ratio
Efficient production and strong supply chain management ensure high quality and low prices, reducing customer procurement costs
Long term partnership
Putting customers at the center, establishing long-term stable cooperation, and assisting in the growth of customer business.
Customizable Surge protection devices
Explore our extensive range of customized surge protection devices (SPDs), suitable for various power distribution scenarios and professional applications. We provide comprehensive solutions from basic surge protection to high-performance intelligent surge control:
Industrial surge protection device
Fixed-frame surge protection device
Universal surge protection device
Wholesale surge protection device
A brief introduction
WHY CHOOSE US
- Industry-leading testing: Every surge protection device (SPD) undergoes 100% strict testing in line with international safety standards (e.g., surge current withstand capacity, voltage protection level), ensuring compliance with surge protection norms.
- High-quality materials: Premium components (e.g., metal oxide varistors with stable performance) extend the SPD’s service life and guarantee consistent surge suppression capability.
- Engineering Innovation: Our R&D team continuously optimizes SPD technology—such as enhancing response speed to transient surges and expanding protection frequency bands—to improve surge defense effectiveness.
- Global certification: Our entire SPD series has obtained IEC, CE, UL, and regional safety certifications, meeting the access requirements of markets worldwide.
- Comprehensive support: We provide end-to-end services from SPD selection guidance (matching models to scenario surge risks) to installation training and after-sales maintenance support.
Why choose a surge protection device?
Surge protection devices (SPDs) are essential components in modern electrical systems, specializing in suppressing transient overvoltages (surges) caused by lightning, grid fluctuations, or equipment switching. They aim to provide reliable protection in various applications, preventing damage to electrical equipment and ensuring system stability. Here’s why SPDs are the wise choice to meet your electrical safety needs.
Efficient Overload Protection
Surge protection devices (SPDs) provide excellent defense against transient overvoltages (surges), ensuring your electrical equipment and systems remain safe from potential damage caused by lightning strikes or grid fluctuations.
- High surge current withstand capacity
- Ultra-fast response time
- Adaptable protection levels
Advanced security features
Surge protection devices (SPDs) are equipped with advanced safety features that help mitigate surge-related risks and enhance the stability of electrical systems.
- Surge protection module
- Enhanced insulation design
- Status monitoring function
Versatile Applications
Surge protection devices (SPDs) can be used in various environments and applications, making them a flexible choice for protecting different electrical systems.
- Home usage
- Commercial installation
- Industrial setups
Cost-Effective Solution
Investing in surge protection devices (SPDs) helps cut long-term equipment repair and replacement costs, as they effectively shield electrical systems from surge damage while maintaining a long operational life.
- Durable structure
- Reduce maintenance costs
- long service life
The advantages of our product
High surge energy absorption capability
Can quickly absorb and dissipate large transient surge energy (up to hundreds of kiloamperes), effectively clamping overvoltages to safe levels—suitable for scenarios with frequent surge risks.
Intelligent functions
Compatible with intelligent monitoring systems, supporting remote status monitoring, surge event recording, and fault early warning—improving the efficiency of electrical system safety management.
Long service lif
Uses high-stability varistor materials and optimized heat dissipation design, with a service life of 8–12 years (or 20,000+ surge impact cycles), far exceeding traditional basic surge protectors.
Low maintenance cost
No consumable parts, simplified structural design, and visual status indicators (normal/fault) reduce daily maintenance frequency and operational costs.
High protection accuracy
The voltage protection level (Up) can reach as low as 1.2 times the rated voltage, with precise clamping of transient overvoltages—meeting the protection needs of sensitive electrical equipment.
Brand reputation
Certified by authoritative bodies such as ISO, IEC, and UL, widely used in global residential, commercial, and industrial markets, with guaranteed product quality and comprehensive after-sales support.
Get Your Customized Quotation!
We provide customized solutions. Tell us your needs for a precise quote.
Not just a surge protection device manufacturer
We not only produce surge protection devices (SPDs), but also offer a range of customized value-added services to meet your project needs. These include scenario-based surge protection scheme design, personalized product parameter customization, and matching intelligent monitoring system integration. We are committed to pursuing excellence, ensuring that every customer receives personalized attention, expert guidance (e.g., surge risk assessment for specific sites), and seamless support throughout the entire process of cooperation.
Service Consultation
Whether your surge protection device (SPD) needs are for basic applications or complex projects, our team can provide professional advice and technical consultation. For high-difficulty projects (e.g., large-scale industrial surge protection systems), we offer in-depth engineering support—including site surge risk assessment—to ensure the selection of the best SPD products and application solutions.
Product Recommendations
Not sure which SPD is suitable for your system? Our experts will provide free customized advice based on your specific operational scenarios (e.g., lightning-prone areas, sensitive equipment protection) and environmental requirements, ensuring you receive the product that best meets your surge defense needs.
Service Consultation
If you lack a reliable freight forwarder, we can arrange transportation from the factory to the project site at no additional cost. Our logistics team ensures timely and safe delivery, keeping your project on schedule and minimizing downtime.
Installation Support
We provide professional installation guidance for SPDs—including wiring specifications, grounding requirements, and coordination with existing electrical systems. Our technical team can also offer on-site installation training to ensure correct deployment and optimal surge protection performance.
What are our clients saying
Don’t just believe what we say! Take a look at satisfied customers’ evaluations of our surge protection devices (SPDs):
“These SPDs have significantly improved the stability of our industrial electrical systems—they effectively absorbed a lightning-induced surge last month, preventing damage to our production equipment.”
John Doe
Electrical Engineer
“The SPDs are really user-friendly; they were easy to integrate into my home distribution box, and I no longer worry about appliance damage from grid voltage fluctuations.”
Tom Johnson
Homeowner
“I trust these SPDs for their durability—they’ve held up perfectly in my workshop setup, and the status indicator gives me peace of mind about their protection function.”
James Brown
DIY Enthusiast
“Since installing these SPDs in our office building, we’ve had zero equipment failures caused by surges. Maintenance costs have dropped, and system reliability has improved dramatically.”
Maria Smith
Facilities Manager
WEISHO employs the most advanced production equipment and precise testing methods at all times, providing a solid guarantee for the company’s product manufacturing and quality inspection.
All products of the entire series have undergone strict environmental and electrical tests.
At the same time, the company has obtained ISO9001 quality management system and ISO14001 environmental management system certifications.
♥Wide selection
♥OEM Quality
♥100% Satisfaction Guarantee
Looking forward to working with you
Your trusted electrical equipment supplier
FAQ
Learn more about surge protection devices (SPDs) through these frequently asked questions.
What is a surge protection device?
A device that clamps transient overvoltages (surges) to protect electrical equipment from damage caused by lightning or grid fluctuations.
How do surge protection devices work?
They absorb surge energy via components like varistors, clamping overvoltages to safe levels within nanoseconds.
Why use surge protection devices?
To prevent equipment damage, reduce downtime, and enhance electrical system stability.
What are the components of an SPD?
Core components include surge absorption modules (e.g., varistors), housings, and status indicators.
How often should SPDs be tested?
Check status indicators monthly; professional testing every 1–2 years.
Can SPDs be used in residential applications?
Yes—suitable for home distribution boxes to protect appliances from grid fluctuations.
What maintenance do SPDs require?
Minimal: Check status indicators; replace if the fault indicator activates.
Are SPDs environmentally friendly
Most use RoHS-compliant materials and are recyclable.
What sizes do SPDs come in?
Available in various current ratings (e.g., 20A, 40A) and physical sizes for different scenarios.
Do SPDs have a warranty?
Typically 1–2 years, covering material and workmanship defects.
