# Residual Current Breaker HiSmart NV821938 4P 20A 30mA

**URL:** https://aio.lv/en/product--hismart-nv821938--10842378
**Data updated:** 2025-12-30 12:45 (EET)
**Category:** Power Sockets
**Manufacturer:** HiSmart
**Manufacturer code:** NV821938
**EAN:** 6942034324117
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 30.57 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hismart-nv821938--10842378

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.89 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Residual current breaker HiSmart NV821938 is a 4-pole device rated for 20 A with 30 mA residual current sensitivity. Designed to detect earth leakage and disconnect supply to protect against electric shock and fire risk, it is suitable for residential and light commercial installations requiring four-pole protection and selective trip at 30 mA.

## Long description

Residual Current Breaker HiSmart NV821938 is a 4-pole RCBO rated at 20 A with 30 mA residual sensitivity. It combines overcurrent (class C) and earth-leakage protection in a single device to detect leakage currents and disconnect supply, reducing the risk of electric shock and fire in residential and light commercial installations. The unit is designed for DIN-rail mounting and supports cable or pin-type busbar connections.
Advantages
This HiSmart NV821938 RCBO provides combined protection against overloads, short circuits and earth leakage with a breaking capacity of 6 kA. Features include an anti-mistake contact terminal block, flame-retardant and high-temperature resistant housing, impact resistance, and clear contact-position indication (red = closed, green = open). It supports top connection and accommodates conductors or busbars up to 35 mm².
Suitable for
Residential electrical distribution boards requiring 4-pole protection
Small commercial installations where 30 mA earth leakage sensitivity is needed
Circuits that require combined overcurrent (class C) and residual-current protection
Key specifications
Number of poles: 4
Rated current (In): 20 A
Trip characteristic: Class C
Rated sensitivity: 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 operations; Electrical life: 4,000 operations
Protection rating: IP20
Connection type: cable / pin-type busbar, top connection
Wire/busbar 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
Warranty: 24 months
How to use
Install the HiSmart NV821938 on a standard 35 mm DIN rail according to local electrical codes. Make top connections using appropriate cables or a pin-type busbar, ensuring conductor cross-sections do not exceed 35 mm². Verify correct polarity and tighten terminals to the manufacturer’s torque specifications. Use the contact-position indication to confirm the device state (red = closed, green = open) and test the unit after installation to ensure correct tripping at leakage currents.
Usage recommendations
Mount and commission this RCBO only by qualified personnel. Periodically test residual-current operation according to local regulations and the manufacturer’s instructions to maintain protection performance.

## FAQ

### How much does the Residual Current Breaker HiSmart NV821938 4P 20A 30mA cost, and is it available for purchase?

The price is 36.99 € (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 06.07.2026 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/10842378/60193146_large.webp