ISO9001, CE, TUV ,CB, RoHS
5000+ Specifications
ODM & OEM
GA&DA manufactures Type 1, Type 2 and Type 1+2 surge protection devices for AC power distribution, DC and photovoltaic systems, industrial control circuits and communication networks.
We support distributors, panel builders, electrical contractors and OEM customers with model selection, bulk supply, private labeling and export packaging.
Combined lightning and surge protection for AC main power systems. Reliable SPD supplier with IEC certified designs.
PV and DC circuit protection against lightning and transient surges. Ideal for solar inverter systems and DC networks.
Primary surge protection at the service entrance. GA&DA provides high-discharge SPDs for industrial and building power systems.
Protect sensitive data, control, and communication lines from voltage spikes. Ideal for PLCs, telecom, and automation systems.
Secondary surge protection for distribution boards and critical equipment. Compact modular SPDs for AC networks.
Type 2 DC SPD for solar panels and inverters, providing fast response and stable voltage control. Certified by IEC/EN 61643.
A surge protection device, or SPD, limits transient overvoltage and diverts surge current away from sensitive electrical equipment.
During normal operation, the SPD remains in a high-impedance state. When a surge exceeds its operating threshold, the device rapidly conducts the surge current to the protective earthing system. After the transient event, it returns to its normal state.
An SPD does not replace a circuit breaker, fuse, grounding system or external lightning protection system. Effective protection requires correct device selection, coordinated backup protection, short connecting conductors and reliable grounding.
This fast response and self-recovery behavior make SPDs an essential element in all modern electrical installations, especially in solar PV systems, industrial control panels, and communication networks.
When the voltage exceeds its designed threshold, the SPD rapidly provides a low-resistance path and redirects the excess surge current away from sensitive equipment to the grounding system. This reduces the voltage to a safer level. After the surge ends, the SPD returns to standby and continues monitoring the circuit.
SPDs commonly use metal oxide varistors (MOVs), gas discharge tubes (GDTs), or combined protection components. Because these components gradually deteriorate after repeated surges, the SPD status indicator should be checked regularly and the protection module replaced when necessary.
Each SPD type serves a specific protection role. The correct choice depends on installation position, lightning exposure and system characteristics.
| Comparison Item | Type 1 SPD | Type 2 SPD | Type 1+2 SPD |
|---|---|---|---|
| Main Function | Lightning current discharge | Switching surge protection | Combined lightning and surge protection |
| Installation Position | Main distribution board | Sub-distribution board | Main distribution board |
| Typical Test Waveform | 10/350 μs | 8/20 μs | 10/350 μs and 8/20 μs |
| Key Parameter | Iimp | In / Imax | Iimp / In / Imax |
| Typical Application | Buildings with external lightning protection | Residential and commercial systems | High-risk installations requiring combined protection |
| Recommended Installation | Incoming power supply | Downstream circuits | Incoming power supply |
Choosing the right surge protection device depends on the installation position, electrical system and expected surge level. Use the guide below to identify the appropriate SPD for power distribution, photovoltaic or signal protection.
Recommended: Type 1 or Type 1+2 SPD
Installed at the main incoming panel, these surge protection devices discharge high-energy lightning currents and protect the electrical system at the building entrance.
Typical applications: Industrial facilities, commercial buildings and installations with external lightning protection.
Recommended: Type 2 SPD
A Type 2 surge protection device protects downstream electrical equipment against induced lightning surges and switching overvoltages.
Typical applications: Distribution boards, control panels, industrial machinery and residential electrical systems.
Recommended: DC Surge Protection Device
A DC SPD protects photovoltaic strings, inverters, battery storage equipment and other DC circuits from transient overvoltages.
Typical applications: Solar combiner boxes, PV inverters, energy storage systems and DC distribution panels.
Recommended: Signal Surge Protector
Signal surge protectors limit transient overvoltages entering through communication, monitoring and control cables.
Typical applications: Ethernet networks, CCTV systems, RS485 lines, sensors and industrial automation equipment.
GA&DA manufactures AC, DC and signal surge protection devices for power distribution, solar PV and industrial control applications. We support distributors, panel builders, electrical contractors and project buyers with product selection, technical documentation and flexible OEM/ODM services.
Selected GA&DA surge protection device models are tested according to applicable IEC and EN 61643 requirements. Available solutions include Type 1, Type 2 and Type 1+2 SPDs for different installation positions and surge protection levels.
We provide custom logo, labeling, packaging and technical configuration support for international distributors and electrical brands. Our team can assist with system voltage, pole configuration, discharge capacity and application-specific SPD selection.
As a surge protection device manufacturer, GA&DA regularly participates in international electrical and solar energy exhibitions. These events help us showcase SPD solutions, communicate with global buyers, and provide direct support for OEM, ODM and project-based requirements.
Selected GA&DA surge protection device series have been tested for international electrical safety and compliance requirements, including CB, TÜV, CE and RoHS. Certificates apply only to the models and specifications stated in each document.
Verified buyer feedback reflects GA&DA’s performance in manufacturing quality, specification accuracy, delivery and supplier service.
F***n
🇦🇺 Australia
On-time delivery and fully compliant with my order requirements. The manufacturing quality was very high, and the specifications matched the quotation.
C***z
🇺🇸 United States
Quality products and fast shipping.
Need help selecting a surge protection device for your distribution board, solar PV system or industrial project? Contact GA&DA for technical parameters, model selection, OEM or ODM support and quotations.
Get a QuoteYou can fill out the form on this page or email us directly at info@cngdfl.com Our engineering and sales team will respond within 24 hours with datasheets and pricing.
