What is the difference between 10/350μs and 8/20μs waveform for LV surge arrester according to IEC 61643-1?

When it comes to surge protection and lightning current testing, you’ll often see terms like 10/350 μs and 8/20 μs used to describe current waveforms. These numbers are not random,they represent standardized test waveforms defined in IEC standards to simulate real-world lightning and surge conditions. But what exactly do they mean and what’s the difference between them? Let’s break it down.

10/350 μs → rises to peak in 10 μs, decays to half in 350 μs.

8/20 μs → rises to peak in 8 μs, decays to half in 20 μs.

Understanding the 10/350 μs and 8/20 μs surge waveforms is essential when designing effective lightning protection systems.

Use Class I SPDs tested with the 10/350 μs waveform at the main service entrance to handle direct lightning strikes.

Use Class II SPDs tested with the 8/20 μs waveform downstream to protect sensitive equipment from induced or switching surges.

By selecting the right SPD class and combining it with a proper earthing system, you ensure reliable surge protection and extend the lifespan of your electrical infrastructure.

Jera Line produce 8/20 μs waveform Type 2 PSD LV surge arrester

Jera Line specializes in manufacturing low-voltage (LV) surge arresters designed to protect electrical systems and sensitive equipment from transient overvoltages caused by indirect lightning strikes and switching surges.

Key Features of Jera Line Type 2 SPD LV Surge Arresters

• 8/20 μs waveform tested — designed to protect against induced surges and switching transients
• Metal Oxide Varistor (MOV) technology for fast and efficient surge suppression
• Reliable overvoltage protection — prevents damage to cables, switchgear, and sensitive electronics
• Compact and robust design — easy to install in LV distribution boards and electrical cabinets
• Low maintenance — no frequent inspections required, reducing operational costs
• Compliance with IEC 61643-11 standards — ensuring global compatibility and safety

Applications

Jera Line’s 8/20 μs Type 2 SPD LV surge arresters are widely used in:

• Residential buildings — protecting home electrical systems and appliances
• Commercial facilities — securing sensitive equipment and IT infrastructure
• Industrial environments — safeguarding machinery and automation systems
• Renewable energy systems — ensuring stable operation of solar, wind, and hybrid power setups

Key models

Insulation piercing connectors for LV surge arrester

The combination of surge protectors and insulation piercing connectors offers a robust solution for modern power distribution systems.

Why choose Jera Line as your low voltage surge arrester’s supplier?

1. Direct factory located in China
2. Quick production due to a professional work team
3. In-house laboratory can help to conduct self-testing
4. Rigorous quality control process
5. Global trade experience
6. OEM & ODM are both feasible

Conclusion

Jera Line’s LV surge arresters provide robust, cost-effective, and reliable protection for low-voltage electrical systems. With advanced MOV technology and compliance with IEC standards, they ensure your power networks, equipment, and devices remain safe from induced surges and switching transients.

If you're seeking high-quality LV surge protection, Jera Line delivers trusted solutions tailored to residential, commercial, and industrial applications.