Chint NU6-IIG 2P 40kA 440V AC Surge Protector

If you’ve ever had a lightning strike or a sudden voltage spike take out an inverter, solar charge controller, or a room full of appliances in one go, you already know why a proper surge protective device isn’t optional in Pakistan’s electrical setups. It’s cheap insurance against a very expensive afternoon.

The Chint NU6-IIG is a 2 pole, 40kA, 440V AC surge protector built for exactly this. It sits at the entry point of your distribution board and clamps down transient overvoltages before they reach your wiring, inverters, UPS units, or solar equipment. Rated to IEC/EN 61643-11 standards, it’s designed for 230/400V AC systems and works across TN-S, TN-C, TT, and IT grounding configurations, which covers the vast majority of residential and commercial setups you’ll find across Lahore, Karachi, and Islamabad.

What makes the NU6-IIG genuinely practical on site is the modular design. Instead of replacing the whole unit after a surge event, only the protection module needs swapping while the base stays wired in. A built in visual fault indicator tells you (or your electrician) at a glance whether the module is still good or needs replacing, so there’s no guesswork and no cutting power just to check.

With a 40kA surge current rating, this unit is well suited for standard residential and light commercial installations, and it’s a popular choice for solar power setups where inverters and charge controllers are especially vulnerable to grid side spikes. The 2 pole configuration protects both phase and neutral in a 230/400V AC50Hz system.

At HN Electric, we stock genuine Chint surge protectors, not the unbranded clones common on marketplace listings, and our team can help you confirm the right pole count and kA rating for your specific panel before you order. DIN rail mounted, compact footprint, and built for long term reliability in Pakistan’s grid conditions.

• Q: What does the 40kA rating mean? A: It’s the maximum surge current the device can safely discharge during a lightning or transient event — 40kA is suitable for standard residential/commercial protection.
• Q: Can I use this for my solar inverter? A: Yes, it’s commonly installed ahead of solar inverters and charge controllers to protect against grid-side and lightning-induced surges.
• Q: Do I need to replace the whole unit after a surge? A: No — only the internal protection module needs replacing; the base and wiring stay in place.
• Q: Is professional installation required? A: Yes, it should be installed by a licensed electrician at your distribution board.