# MEAN WELL RT-125B power adapter 125 W 12 V input 176-264 V

**URL:** https://aio.lv/en/product--mean-well-rt-125b--3891515
**Data updated:** 2026-01-06 11:12 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** mean well
**Manufacturer code:** RT-125B
**EAN:** 4021087057462
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 61.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 50.82 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mean-well-rt-125b--3891515

## 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 | 1.99 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

The MEAN WELL RT-125B is a reliable power adapter with an output power of 125 W and output voltage of 12 V. It operates within an input voltage range of 176 - 264 V and is RoHS compliant. Its compact dimensions of 98 mm width, 199 mm depth, and 38 mm height make it suitable for various applications.

## Long description

The MEAN WELL RT-125B is a 125 W enclosed AC-DC power supply designed for reliable low-voltage DC output. It accepts an input voltage range of 176–264 VAC and delivers a regulated 12 V DC output at up to 10.4 A continuous (125 W). The compact metal enclosure and RoHS compliance make it suitable for industrial and system integration applications where a stable 12 V supply is required.
Advantages
The RT-125B provides a high-efficiency, single 12 V regulated output in a compact enclosed package. Its wide input range (176–264 V) supports use in regions with varying mains voltages. The metal housing offers mechanical protection and electromagnetic shielding, and the unit meets RoHS standards for restricted hazardous substances.
Suitable for
Industrial control equipment
Embedded systems and single-board computers
Communication devices and networking equipment
Automation and instrumentation panels
Key specifications
Model: MEAN WELL RT-125B
Output power: 125 W
Output voltage: 12 V DC
Maximum output current: 10.4 A (125 W / 12 V)
Input voltage range: 176–264 VAC
Enclosed metal housing; dimensions: 98 × 199 × 38 mm
RoHS compliant
MPN: RT-125B; EAN: 4021087057462
How to use
Install the RT-125B in a location with adequate ventilation and secure it mechanically using appropriate fasteners for the enclosure. Connect the AC mains within the specified 176–264 VAC range to the input terminals following safety regulations. Connect the 12 V DC output to the load, ensuring the combined load does not exceed 125 W (maximum 10.4 A). Verify correct polarity and use appropriate wiring and fusing for the output circuit.
Usage recommendations
For reliable operation, avoid operating at full load continuously in poorly ventilated environments. Allow clearance around the enclosure for airflow, protect the output with a suitable fuse or circuit breaker, and follow local electrical codes during installation.

## Specifications

| Feature | Value |
|---|---|
| Input voltage | 176 - 264 |
| Output voltage | 12 |
| Output current | 1 A |
| Output power | 125 W |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.668 kg |
| Height | 38 mm |
| Width | 98 mm |
| Depth | 199 mm |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 20 pc(s) |

## FAQ

### How much does the power adapter MEAN WELL RT-125B cost, and is it available for purchase?

The price is 61.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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. 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, 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 power adapter MEAN WELL RT-125B?

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/3891515/64232648_large.webp