AC and DC Surge Protection Device Manufacturer Since 2009
- Fully certified for sale in the European Union
- Specialized test machines
- Over 16 years of international trade experience
- Factory Inspection Support
- Raw material testing reports available upon request
Quality Control
Surge Protection Device Testing Before Shipment
Every batch undergoes thorough testing before shipment, and we back our products with a two‑year warranty, offering free replacement for any defective units.
Every SPD is tested using automated equipment to validate the varistor (MOV) and gas discharge tube (GDT).
We check clamping voltage, leakage current, and response time to ensure these critical protective components meet exact specifications before shipment.
We perform certified high-current testing that simulates real-world surge conditions.
Our lab verifies SPD performance under extreme transients — 160 kA (8/20 µs waveform) for commercial-grade protection and 50 kA (10/350 µs waveform) for critical infrastructure.
Proactive safety testing: We expose varistors to sustained overvoltage conditions to monitor their thermal behavior.
This critical assessment ensures fail-safe operation and eliminates overheating risks in any operating environment.
Comprehensive waveform testing that replicates real-world conditions.
Our combination wave generator delivers a simultaneous 1.2/50 µs voltage surge and 8/20 µs current surge to verify SPD response accuracy under complex transient events.
LEEYEE SPD CERTIFICATION
We make all our products to IEC (International Electrotechnical Commission) standards.
They are certified by CQC, TUV, CB, CE, and RoHS, meeting all requirements to be sold across the European Union.
OUR EXHIBITION
Professional SPD Manufacturer & Supplier from China
Enterprise Member Unit of the Lightning Committee of the Chinese Meteorological Society
Vice President Unit of Yueqing Lightning Protection Electrical Industry Association
Vice President Unit of Yueqing Intelligent Manufacturing Industry Federation
OEM/ODM SUPPORT
Contact us for parameter, color, appearance, logo, and packaging design!
Why choose LEEYEE
13 years of professional experience
Communicate with our sales and engineers about your basic needs for motor performance, diameter, equipment used, etc
High quality raw materials
According to your needs, the sales engineer will recommend 2-3 suitable motor solutions for you.
OEM/ODM customization Service
We offer OEM/ODM customization services and take pride in our attention to detail and dedication to customer satisfaction, guaranteeing that your OEM/ODM projects are in good hands.
8000 square meter factory
We have a factory with an area of 8,000 square meters ensures a high level of production capacity and fast delivery.
Specialized testing machine
We equipped with specialized testing machines and providing a two-year comprehensive after-sales service.
Support on-site factory inspections
We warmly welcome all business leaders to conduct on-site factory inspections. We support the provision of verification reports, inspection videos, or engage specialized quality inspection companies to meet all your needs.