# Optical SFP Module MaxLink ML-S5531-3 WDM BiDi 1550 nm, 3 km

**URL:** https://aio.lv/en/product--maxlink-ml-s5531-3--11391742
**Data updated:** 2026-02-14 19:46 (EET)
**Category:** Network Media Converters
**Manufacturer:** MaxLink
**Manufacturer code:** ML-S5531-3
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 8.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--maxlink-ml-s5531-3--11391742

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Compact SFP optical transceiver MaxLink ML-S5531-3 supporting WDM BiDi operation at 1550 nm wavelength with a transmission range up to 3 km. Designed for hot-pluggable installation in compatible network equipment, it enables single-fiber bidirectional data links, ideal for fiber backbone extensions, switches and media converters. Provides reliable optical connectivity for short metro and enterprise links.

## Long description

The MaxLink ML-S5531-3 is a compact SFP optical transceiver designed for WDM BiDi operation at a 1550 nm wavelength and a transmission range up to 3 km. This hot-pluggable module fits standard SFP slots in switches, media converters and other compatible network devices to enable single-fiber bidirectional links, simplifying fiber deployment where laying a second fiber is impractical. The transceiver supports common applications in short metro, campus and enterprise backbones where reliable optical connectivity and minimal footprint are required.
Advantages
The module offers single-fiber bidirectional transmission using WDM BiDi technology, reducing fiber infrastructure needs while preserving full duplex communication. Its SFP form factor supports hot-pluggable installation for minimal service disruption during replacement or upgrades. The device is engineered to provide stable signal transmission over distances up to 3 km at the 1550 nm wavelength, compatible with typical network equipment acceptance of standard optical transceivers.
Suitable for
 Extending fiber backbone links in enterprise and campus networks
 Connecting switches and routers where single-fiber runs are preferred
 Media converters and fiber-to-Ethernet conversion in limited-fiber environments
 Short metro links and access networks up to 3 km
Key specifications
 Form factor: SFP (hot-pluggable)
 Transmission method: WDM BiDi (single-fiber bidirectional)
 Wavelength: 1550 nm
 Maximum link distance: up to 3 km
 Application: short metro, enterprise and campus fiber links
How to use
Install the ML-S5531-3 into a compatible SFP slot on your switch, media converter or other network device while the device is powered according to the host equipment manual. Pair with a matching BiDi transceiver at the remote end that uses the complementary wavelength or channel configuration for proper bidirectional operation. Route and secure a single-mode fiber to the transceiver’s optical connector, confirm link LEDs on the host device, and verify connectivity with standard network testing tools.
Usage recommendations
Use the module with single-mode fiber and ensure connectors and fiber cleanliness to maintain signal quality. Match the transceiver with a compatible BiDi partner module and verify the host device supports SFP optics. Observe vendor guidance for handling and electrostatic precautions when installing or removing the module.

## FAQ

### How much does the SFP Optical Module MaxLink ML-S5531-3 1550 nm 3 km cost, and is it available for purchase?

The price is 10.49 € (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 01.07.2026 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 MaxLink 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 MaxLink 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/11391742/66032563_large.webp