# Surge Protection Device HiSmart NV821754 4‑pole 1000 VDC

**URL:** https://aio.lv/en/product--hismart-nv821754--10841786
**Data updated:** 2025-12-30 12:45 (EET)
**Category:** Solar Panel Accessories
**Manufacturer:** HiSmart
**Manufacturer code:** NV821754
**EAN:** 6942108715247
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 83.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 69.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hismart-nv821754--10841786

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

HiSmart NV821754 is a 4‑pole DC surge protection device rated for 1000 VDC. Designed to protect DC electrical systems and equipment from voltage spikes and transient overvoltages, it connects in-line with the DC supply. Suitable for solar, battery and industrial DC installations, it helps prevent damage and reduce downtime by diverting surge energy away from sensitive components.

## Long description

HiSmart NV821754 is a 4-pole surge protection device for DC systems, rated for 1000 V DC. It is designed to protect photovoltaic arrays, battery systems and industrial DC equipment from transient overvoltages caused by indirect lightning strikes and switching events. The device mounts on a 35 mm DIN rail and connects in-line with the DC supply to divert surge energy away from sensitive components.
Advantages
The NV821754 offers Class B protection with a nominal discharge current of 60 kA and a maximum discharge current of 100 kA, providing a high level of surge attenuation for DC systems up to 1000 V. Its response time of under 25 ns and a voltage protection level up to 5 kV ensure rapid clamping of transient overvoltages. The compact design (107 x 90 x 67 mm) and DIN-rail mounting simplify installation in solar combiner boxes and DC switchgear. The unit is manufactured to IEC 61643-1 standards and carries CE marking.
Suitable for
Photovoltaic (PV) arrays and solar inverter DC inputs
Battery energy storage systems (BESS)
Wind power DC equipment and converters
Industrial DC power distribution and control panels
Key specifications
Poles: 4 (4P)
Class: B
Maximum continuous operating voltage (Uc): 1000 V DC
Nominal discharge current (In): 60 kA
Maximum discharge current (Imax): 100 kA
Voltage protection level (Up): ≤ 5 kV
Response time: \< 25 ns
Frequency: 50/60 Hz
Operating temperature: -40 °C to +85 °C
Relative humidity (at 25 °C): \< 95%
Installation: 35 mm DIN rail
Wires cross-section: 4–6 mm²
Dimensions: 107 x 90 x 67 mm
Standards: IEC 61643-1, CE
Warranty: 24 months
How to use
Mount the HiSmart NV821754 on a 35 mm DIN rail inside the DC distribution enclosure or combiner box. Connect the device in-line with the DC positive and negative conductors according to the system wiring diagram and local electrical regulations. Ensure conductor cross-sections between 4 and 6 mm² and tighten terminals to the recommended torque. Verify polarity and correct routing of surge paths before energizing the system. Perform a visual inspection and functional checks after installation and after any recorded surge event.
Usage recommendations
Install the surge protection device as close as practical to the protected equipment or DC input terminals to minimise lead length. Combine the NV821754 with proper system grounding and equipotential bonding. Replace the device if it shows visible damage or after exposure to a surge event that exceeds rated performance; follow local safety standards when servicing.

## FAQ

### How much does the HiSmart NV821754 4‑pole 1000 VDC Surge Protector cost, and is it available for purchase?

The price is 83.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can HiSmart NV821754 4‑pole 1000 VDC Surge Protector be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All HiSmart products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HiSmart service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10841786/60192881_large.webp