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NU5-I+II Low-Voltage Surge Protective Device
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Low Voltage IEC Final Power Distribution NU5-I+II Low-Voltage Surge Protective Device
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Final Power Distribution
NU5-I+II-SPD-2P 25kA
NU5-I+II-SPD-3P+N 15kA
NU5-I+II-SPD-2P 25kA
NU5-I+II-SPD-3P+N 15kA

NU5-I+II Low-Voltage Surge Protective Device

The CHINT NU5-I+II Low-Voltage Surge Protective Device (SPD) provides combined Type I and Type II protection for AC 230/400 V systems. Designed to safeguard electrical networks from transient overvoltages and lightning surges, it offers a discharge capacity of up to 60 kA with a fast response and plug-in modular design. Equipped with overheating and aging protection, visual fault indication, and optional remote alarm contact, the NU5-I+II ensures superior safety, reliability, and easy maintenance in low-voltage power distribution systems.

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Product Information

Name
Size
Release time
Operate
NU5-I+II-SPD-catalog
437.86KB
2025-12-24
Download
Name
Size
Release time
Operate
2208-NU5-I+II-SPD-CB Certification-12.5kA 15kA.pdf
898.02KB
2025-01-17
Download
2208-NU5-I+II-SPD-CB Certification-25kA.pdf
898.84KB
2025-01-17
Download
2208-NU5-I+II-SPD-CE Certification-12.5kA 15kA.pdf
839.89KB
2025-01-17
Download
2208-NU5-I+II-SPD-CE Certification-25kA.pdf
823.2KB
2025-01-17
Download
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FAQs

 

What is the primary function of the NU5-I+II Low-Voltage SPD?

It protects electrical equipment by suppressing transient overvoltages and lightning surges, discharging surge energy safely to ground.

 

What makes it a “Type I + Type II” SPD?

The NU5-I+II combines Type I (lightning current) and Type II (surge current) protection in one unit, suitable for both main and sub-distribution panels. 

 

What are the available models?

The NU5-I+II is available in 12.5 kA, 15 kA, and 25 kA versions, with optional remote signaling (F-type) modules for monitoring. 

 

What additional safety features does it include?

It provides thermal disconnection, visual fault indication, and optional remote alarm contacts, ensuring safe operation and quick maintenance response.

 

How is the NU5-I+II installed?

It mounts on a TH35 DIN rail, features plug-in replaceable modules, and allows easy wiring with 2.5–35 mm² conductors, ideal for modular power panels.

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