# Residual Current Circuit Breaker HiSmart NV821921 4P 16A 30mA

**URL:** https://aio.lv/en/product--hismart-nv821921--10842377
**Data updated:** 2025-12-30 12:45 (EET)
**Category:** Power Sockets
**Manufacturer:** HiSmart
**Manufacturer code:** NV821921
**EAN:** 6942034324100
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.99 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 29.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hismart-nv821921--10842377

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Residual current circuit breaker HiSmart NV821921 is a 4-pole RCD rated for 16 A with 30 mA residual current sensitivity. Designed to detect and interrupt earth leakage faults, it protects against electric shock and reduces fire risk. Suitable for residential and light commercial installations requiring 4P protection and reliable residual-current detection.

## Long description

Residual Current Circuit Breaker HiSmart NV821921 is a 4-pole RCBO rated at 16 A with 30 mA residual-current sensitivity. It provides combined protection against overloads, short circuits and earth-leakage faults for residential and light commercial electrical installations. The device meets IEC 61009-1 / EN 61009-1 standards and is intended for DIN-rail (35 mm) mounting with top-side connections.
Advantages
This HiSmart NV821921 RCBO integrates both residual-current detection and overcurrent protection in a single unit, simplifying wiring and saving panel space. It features a clear contact position indication (red = closed, green = open), an anti-mistake contact terminal block, and a flame-retardant, impact- and high-temperature-resistant housing. The device provides a rated short-circuit capacity of 6 kA and fast break time (≤0.1 s), ensuring reliable fault interruption.
Suitable for
Residential distribution boards requiring 4-pole leakage protection
Light commercial electrical panels with combined RCD and MCB needs
Circuits where protection against electric shock and earth-fault fire risk reduction is required
Key specifications
Number of poles: 4
Rated current (In): 16 A
Tripping characteristic: Class C
Rated residual operating current: 30 mA
Rated voltage (Ue): AC 230 V
Rated short-circuit capacity (Icn): 6000 A
Rated impulse withstand voltage (Uimp): 4000 V
Insulation voltage (Ui): 500 V
Frequency: 50/60 Hz
Break time: ≤0.1 s
Mechanical life: 10,000 cycles
Electrical life: 4,000 cycles
Protection degree: IP20
Connection type: cable / pin-type busbar, top connection; conductor cross-section up to 35 mm²
Mounting: DIN rail EN 60715 (35 mm)
Operating temperature: -25 °C to +70 °C
Dimensions: 82 x 72 x 78 mm
Standards: IEC 61009-1 / EN 61009-1
How to use
Install the HiSmart NV821921 on a standard 35 mm DIN rail and make electrical connections to the top terminals according to the wiring diagram and local regulations. Ensure conductors are within the specified cross-sectional limits (up to 35 mm²) and tighten terminals to the recommended torque. Use the device in circuits up to its rated current (16 A) and rated voltage (AC 230 V). Test the residual-current function after installation using an appropriate test procedure.
Usage recommendations
Place the RCBO in easily accessible positions within the distribution board for periodic testing. Do not expose the device to corrosive environments or exceed the specified temperature range. Follow national wiring rules and the manufacturer’s installation instructions to ensure safe and reliable operation.

## FAQ

### How much does the Residual Current Breaker HiSmart NV821921 4P 16A 30mA cost, and is it available for purchase?

The price is 35.99 € (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 14.07.2026 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. 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 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/10842377/60193145_large.webp