# MEAN WELL DCWN03B-05 electric converter 3 W 18-36 V 300 mA

**URL:** https://aio.lv/en/product--mean-well-dcwn03b-05--4100851
**Data updated:** 2026-01-13 21:18 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** mean well
**Manufacturer code:** DCWN03B-05
**EAN:** 4021087046930
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 19.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mean-well-dcwn03b-05--4100851

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.99 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

The MEAN WELL DCWN03B-05 is a compact electric converter with a power output of 3 W. It operates with a DC input voltage range of 18 to 36 V and provides an output current of 300 mA. This product is designed for efficient power conversion in various applications.

## Long description

The MEAN WELL DCWN03B-05 electric converter 3 W 18-36 V 300 mA is a compact DC-DC converter designed for applications that require a stable low-power current source. It accepts a wide DC input voltage range from 18 V to 36 V and provides a regulated output current of 300 mA with a maximum power of 3 W, enabling it to drive LEDs, sensors, and small control electronics where controlled current is needed. Its small form factor and straightforward electrical characteristics make it suitable for integration into lighting fixtures, industrial control modules, and battery-powered systems.
Advantages
This converter offers efficient conversion within its specified input range and maintains a constant output current of 300 mA, which simplifies the design of current-driven loads. The compact size reduces space requirements in enclosures and allows for easy mounting. Built with predictable electrical behaviour, it reduces the need for additional external current-regulation circuitry and eases thermal planning for low-power applications.
Suitable for
Driving LED arrays and single high-power LEDs requiring a 300 mA constant current
Powering sensors and instrumentation that need a stable low-power source
Integration into control modules, small industrial devices, and communication equipment
Battery-powered systems where input voltages fall within 18–36 V range
Key specifications
Input voltage range: 18–36 V DC
Output mode: constant current
Output current: 300 mA
Maximum output power: 3 W
Form factor: compact DC-DC converter suitable for panel or PCB mounting
How to use
Connect the converter to a DC supply within the 18–36 V range observing correct polarity. Connect the load to the output terminals, ensuring the load is rated for a constant 300 mA current and does not exceed the 3 W power limit. Verify connections and, if possible, measure output current and voltage under no-load and nominal-load conditions to confirm proper operation. Allow for adequate ventilation or mounting on a heat-dissipating surface for continuous operation within the rated power.
Usage recommendations
For reliable performance, use wiring sized to minimize voltage drop between the supply and the converter. Avoid operating at input voltages near the lower or upper limits if the supply is unstable; provide a regulated input when possible. When driving LEDs, include appropriate connectors and fusing on the input side and ensure the LED forward voltage and combined load do not exceed the converter’s 3 W capacity.

## Specifications

| Feature | Value |
|---|---|
| Power | 3 W |
| On/off switch | No |
| Output current | 300 mA |
| DC input voltage | 18 - 36 |
| USB connectivity | No |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | -40 - 90 |

### Ports & interfaces

| Feature | Value |
|---|---|

### Other features

| Feature | Value |
|---|---|
| Type | DC/DC |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.0125 kg |
| Height | 10.2 mm |
| Width | 20.3 mm |
| Depth | 31.8 mm |

### Power

| Feature | Value |
|---|---|
| Output voltage | -5 - 5 |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |

### Performance

| Feature | Value |
|---|---|
| Certification | RoHS, EN55032, CE, EAC |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | China |

## FAQ

### How much does the MEAN WELL DCWN03B-05 electric converter cost, and is it available for purchase?

The price is 22.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 17.07.2026 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. 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 mean well 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 mean well 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for MEAN WELL DCWN03B-05 electric converter?

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/4100851/64250271_large.webp