CHINT NXU-IIG 40/500 2P 500V DC Surge Protection Device

The CHINT NXU-IIG 40/500 2P 500V DC Surge Protection Device (SPD) is designed to help protect solar PV and other DC electrical systems against transient overvoltage and lightning-related surges. With a continuous operating voltage of 500V DC, 2-pole configuration and maximum discharge current of 40kA, it is a practical protection solution for suitable photovoltaic and DC distribution applications.

The device is part of CHINT’s NXU-II G surge protection range. The DC version is designed for applications such as solar PV systems, combiner boxes, DC distribution equipment and the DC side of photovoltaic installations. Available technical information identifies the 40/500 model with a nominal discharge current of 20kA, maximum discharge current of 40kA and voltage protection level of approximately 1.8kV.

For solar installers and electrical professionals in Pakistan, selecting the correct SPD rating is important. The 500V DC specification should be matched with the actual system voltage and installation requirements before installation. An appropriately rated surge protection device can help reduce the risk of transient voltage damage to connected equipment such as solar inverters and other DC-side components.

The CHINT NXU-IIG 40/500 2P 500V DC SPD also uses a DIN-rail style installation approach, making it suitable for properly designed electrical distribution and protection enclosures. The NXU-II G family incorporates a visual status indication and replaceable protection-module design, helping simplify inspection and maintenance. CHINT lists the wider NXU-II G family as complying with IEC/EN 61643-11 for its applicable low-voltage SPD range.

If you are upgrading a solar protection system, installing a new PV setup or replacing an existing DC surge protector, verify the voltage rating, number of poles, discharge-current requirements and system configuration before purchasing.

HN Electric supplies electrical and solar protection products for customers in Lahore and across Pakistan. Contact the team for current pricing, availability and product compatibility assistance.

1. What is the CHINT NXU-IIG 40/500 used for?

It is a 500V DC surge protection device designed to help protect suitable DC and solar PV electrical systems against transient overvoltage and lightning surges.

2. What is the maximum discharge current of the NXU-IIG 40/500?

The model is rated at a maximum discharge current (Imax) of 40kA, with a nominal discharge current (In) of 20kA.

3. Is the CHINT NXU-IIG 40/500 suitable for solar systems?

Yes. The DC version is specifically listed for photovoltaic applications, including solar PV systems, combiner boxes and DC distribution equipment.

4. Is this an AC or DC surge protection device?

This particular 40/500 version is a 500V DC model. Do not confuse it with the AC NXU-II G versions, which have different voltage specifications. CHINT’s global product page separately lists the AC family with 275V–440V Uc options.