# Hager CDB640D Residual-Current Device 4-Pole 40A Type B+

**URL:** https://aio.lv/en/product--hager-cdb640d--4042698
**Data updated:** 2026-05-18 02:50 (EEST)
**Category:** Power Sockets
**Manufacturer:** Hager
**Manufacturer code:** CDB640D
**EAN:** 3250611627678
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 692.49 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 572.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hager-cdb640d--4042698

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

The Hager CDB640D is a 4-pole residual-current device designed for electrical safety and circuit protection. It features a rated current of 40 A, operates at a 50 Hz frequency, and utilizes Type B+ residual-current technology. With a breaking capacity of 800 A and a total power loss of 6.77 W, this 4-module device is engineered for reliable performance in industrial and commercial electrical distribution systems.

## Long description

The Hager CDB640D is a high-performance 4-pole residual-current device (RCD) engineered to provide advanced electrical safety and circuit protection in demanding environments. Designed for industrial and commercial electrical distribution systems, this device ensures reliable operation by detecting residual currents and disconnecting power when necessary to prevent electrical hazards. With its robust construction and precise engineering, it serves as a critical component for maintaining safety standards in complex electrical installations.
Advantages
This residual-current device offers superior protection through its Type B+ technology, which is capable of detecting both AC and pulsating DC residual currents, as well as high-frequency leakage currents. Its 4-pole configuration allows for versatile application in three-phase systems, ensuring comprehensive monitoring across all phases. The device is built for durability and efficiency, featuring a low total power loss that contributes to energy-conscious electrical design while maintaining a high breaking capacity for enhanced safety during fault conditions.
Suitable for
Industrial electrical distribution boards
Commercial building power systems
Protection of equipment sensitive to DC leakage currents
EV charging infrastructure installations
Variable frequency drive (VFD) circuits
When it may not be suitable
This device is specifically designed for Type B+ applications and may be over-specified for simple residential circuits that only require standard Type AC or Type A protection. It is not intended for use in environments where the electrical system does not support 4-pole configurations or where the rated current requirements exceed 40 A.
Key specifications
Number of poles: 4
Rated current: 40 A
Residual current technology: Type B+
Frequency: 50 Hz
Breaking capacity: 800 A
Total power loss: 6.77 W
Module width: 4 modules
How to use
The Hager CDB640D must be installed by a qualified electrician in accordance with local electrical regulations and safety standards. It is designed for mounting on a standard DIN rail within an electrical distribution enclosure. Ensure that all input and output connections are tightened to the manufacturer's specified torque settings to prevent overheating or poor contact. Once installed, the device should be tested using the integrated test button to verify its mechanical and electrical functionality before putting the circuit into full operation.
What to consider before purchase
Verify that the 40 A rated current is sufficient for your specific circuit load.
Ensure the installation space accommodates a 4-module wide device.
Confirm that the Type B+ protection is required for your specific equipment, such as inverters or EV chargers.
Check compatibility with existing DIN rail distribution boards.
Usage recommendations: Regular maintenance and periodic testing of the residual-current device are essential to ensure continued protection. It is recommended to perform a functional test via the test button at least every six months to confirm the device remains in optimal working condition.

## Specifications

| Feature | Value |
|---|---|
| Breaking capacity | 800 A |
| Circuit breaker type | Residual-current device |
| Total power loss | 6.77 W |
| Residual-current type | Type B+ |

### Power

| Feature | Value |
|---|---|
| Rated current | 40 A |
| Input frequency | 50 |

### Features

| Feature | Value |
|---|---|
| Modules quantity (max) | 4 module(s) |
| Number of poles | 4 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 85 mm |
| Width | 72 mm |
| Depth | 70 mm |

### Design

| Feature | Value |
|---|---|
| Certification | EN 61008-1, VDE 0664-400 |

## FAQ

### How much does the Hager CDB640D Residual-Current Device cost, and is it available for purchase?

The price is 692.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 22.07.2026 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Hager CDB640D Residual-Current Device 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 Hager 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 Hager 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

### Where can I download the instructions for Hager CDB640D Residual-Current Device?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/4042698/58702551_large.webp