# DC isolator switch CNC NV821822 4-pole 32A 1000 VDC

**URL:** https://aio.lv/en/product--cnc-nv821822--10842637
**Data updated:** 2025-12-30 12:45 (EET)
**Category:** Solar Panel Accessories
**Manufacturer:** CNC
**Manufacturer code:** NV821822
**EAN:** 6942108789859
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 21.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 17.76 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--cnc-nv821822--10842637

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.06.2026 | free |
| Pickup points | 29.06.2026 | 1.99 EUR |
| Courier delivery to door | 29.06.2026 | 4.99 EUR |

## Summary description

DC isolator switch CNC NV821822 is a 4-pole safety switch rated for 32 A and 1000 VDC. Designed to disconnect DC circuits for maintenance and emergency shutdowns, it suits solar PV arrays, battery systems and other high-voltage DC installations. The compact 4P design enables reliable isolation of multi-conductor DC lines, improving safety and serviceability.

## Long description

DC isolator switch CNC NV821822 is a 4-pole DIN-rail mounted switch designed for safe isolation of high-voltage DC circuits up to 1000 V and 32 A. The lockable handle and 3 ms arcing time enable reliable disconnection of PV strings or 1–2 MPPT lines for maintenance and emergency shutdowns. The compact unit is suitable for installation in control cabinets, distribution boxes and combiner boxes in solar PV and other DC power distribution systems. It complies with IEC 60947-1, IEC 60947-3, AS5033:2014, NZS5033:2014 and UL508i.
Advantages
The switch provides four-pole isolation with a rated working voltage of DC 1000 V and a rated current of 32 A. A lockable handle secures the switch in the closed position for safety during operation. The device features an arcing time of 3 ms for effective PV string disconnection, flame-retardant and UV-resistant housing, and IP20 protection. Compact dimensions and DIN-rail mounting simplify installation in standard electrical enclosures.
Suitable for
 Solar PV arrays and combiner boxes
 Battery systems and other high-voltage DC installations
 Control cabinets and distribution boxes requiring DC isolation
 Disconnecting 1–2 MPPT lines or multi-conductor DC lines
Key specifications
 Number of contacts: 4
 Rated working voltage (Ue): DC 1000 V
 Insulation voltage (Ui): DC 1500 V
 Rated current (In): 32 A
 Rated impulse voltage (Uimp): 8 kV
 Arcing time: 3 ms
 Mechanical life cycles: 10,000; Electrical life cycles: 3,000
 Connector type: M4; Wire cross-section: max. 4–16 mm²
 Protection class: IP20, V0
 Dimensions: 94.9 × 60.2 × 78.2 mm
 Operating/storage temperature: -40 °C to 85 °C
 Mounting: DIN rail
 Warranty: 24 months
How to use
Mount the CNC NV821822 on a standard DIN rail inside the control cabinet or combiner box. Connect DC conductors to the M4 terminals using appropriate ferrules and cables within the specified 4–16 mm² range. Use the handle to switch the circuit open or closed; the handle can be locked in the closed position for secure operation. Ensure system voltage does not exceed DC 1000 V and follow local electrical codes during installation and commissioning.
Usage recommendations
Use the isolator for infrequent on/off operations and for isolating up to 1–2 MPPT strings. Verify correct wiring and torque on terminals before energising, and perform maintenance only after the switch has been opened and isolated according to safety procedures.

## FAQ

### How much does the DC isolator switch CNC NV821822 4P 32A 1000VDC cost, and is it available for purchase?

The price is 21.49 € (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 22.06.2026 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. All transactions are 100% secure and encrypted.

### 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 CNC 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 CNC 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/10842637/60193732_large.webp