SPD

Surge Protective Devices (SPDs), also known as transient voltage surge suppressors (TVSS) or surge arresters, are critical components designed to protect electrical and electronic equipment from voltage spikes and transient overvoltages. These devices operate by clamping or diverting surge currents to ground, typically using metal oxide varistors (MOVs), gas discharge tubes (GDTs), or silicon avalanche diodes (SADs). SPDs are characterized by key parameters such as nominal discharge current (In), maximum discharge current (Imax), voltage protection level (Up), and response time. They are available in various configurations including single-pole (1P), two-pole (2P), three-pole (3P), and four-pole (4P) versions, with rated voltages from 230V to 690V AC and nominal currents up to 100kA. Common types include Type 1 (for direct lightning strikes), Type 2 (for switching surges), and Type 3 (for equipment-level protection), each with specific mounting options like DIN rail or panel mount.

SPDs are deployed across a wide range of sectors and environments, including industrial control panels, distribution boards, building management systems, renewable energy installations (solar PV and wind), telecommunications infrastructure, and data centers. They are essential in automation systems to protect PLCs, drives, sensors, and communication networks from voltage transients caused by lightning, switching operations, or grid disturbances. In residential and commercial buildings, SPDs safeguard HVAC systems, lighting controls, and security systems. Their use is also critical in oil and gas, transportation, and medical facilities where equipment reliability is paramount.

Our SPD category includes a comprehensive selection of subcategories such as Type 1 surge arresters (e.g., code SPD-T1-40kA), Type 2 surge protectors (e.g., code SPD-T2-20kA), Type 3 plug-in protectors (e.g., code SPD-T3-10kA), and combined Type 1+2 devices (e.g., code SPD-T12-50kA). Key article codes follow a structured format: SPD-[Type]-[Imax]-[Poles], where Type indicates the protection class (T1, T2, T3, T12), Imax is the maximum discharge current in kA, and Poles denotes the number of poles (1P, 2P, 3P, 4P). For example, SPD-T2-20kA-4P represents a Type 2 surge protector with 20kA maximum discharge current and four poles. We also offer specialized SPDs for photovoltaic systems (e.g., SPD-PV-1000V) and signal/data line protectors (e.g., SPD-RJ45-100M).

Partnering with Electric Automation Network ensures access to genuine SPDs from leading manufacturers at competitive prices with up to 65% discount. Our engineering team provides personalized technical support to help you select the right SPD based on your system's voltage, surge current, and protection level requirements. Each product includes detailed documentation with technical datasheets and installation guides. We offer express worldwide shipping, ensuring your critical surge protection components arrive quickly and reliably, minimizing downtime and safeguarding your investments.