# SFP BiDi Transceiver Lightwin 1.25 Gbit 1310nm TX / 1550nm RX, 20 km, DDM, LC-Simplex, Singlemode

**URL:** https://aio.lv/en/product--lightwin-lwo-sfp-3155-20--12368273
**Data updated:** 2026-04-21 17:33 (EEST)
**Category:** Network Media Converters
**Manufacturer:** Lightwin
**Manufacturer code:** LWO-SFP-3155-20
**EAN:** 9120117656813
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 22.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lightwin-lwo-sfp-3155-20--12368273

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Lightwin Optics 1.25 Gbit BiDi SFP transceiver for singlemode fiber provides 1.25 Gbit/s (1250 Mbit/s) full-duplex communication over up to 20 km. Operates with 1310 nm TX and 1550 nm RX wavelengths, features LC-simplex connector, DDM support and 3.3 V supply. Suitable for point-to-point fiber links, telecom and metro networks.

## Long description

Lightwin Optics SFP BiDi transceiver provides full-duplex 1.25 Gbit/s (1250 Mbit/s) communication over singlemode fiber using a single LC‑simplex connector. The module transmits at 1310 nm and receives at 1550 nm, supports digital diagnostic monitoring (DDM), and is designed for links up to 20 km with a single +3.3 V supply. It is intended for point-to-point fiber links in telecom and metro network applications.
Advantages
The SFP BiDi transceiver offers compact SFP form factor with LC connector compatibility, low electromagnetic emission and ESD protection, and compatibility with RoHS and SFF‑8472. It uses wavelength pair 1310 nm TX / 1550 nm RX with FP/DFB laser and PIN photodetectors to enable bidirectional transmission over a single fibre while supporting LVPECL data interface and DDM for status monitoring.
Suitable for
Point-to-point singlemode fiber links
Telecom and metro access networks
Network media conversion and uplinks requiring 1.25 Gbit/s
Environments needing LC‑simplex connector and up to 20 km reach
When it may not be suitable
This module is designed specifically for singlemode fiber and LC‑simplex connections; it is not suitable for multimode fiber systems. It supports links up to 20 km—deployments requiring longer reach or different wavelength combinations may need other transceiver types.
Key specifications
Data rate: 1.25 Gbit/s (1250 Mbit/s)
Optical wavelengths: 1310 nm transmit, 1550 nm receive
Maximum reach: 20 km on singlemode fiber
Connector type: LC‑simplex
Power supply: +3.3 V single supply
Emitter/detector: FP or DFB laser with PIN photodetector (wavelength-specific)
Data interface: LVPECL compatible
DDM: supported
Standards/compliance: RoHS, SFF‑8472, IEC‑60825 laser safety
How to use
Insert the SFP BiDi transceiver into a compatible SFP slot on a switch, router or media converter, ensuring correct orientation and firm seating. Connect a singlemode fiber with an LC‑simplex connector to the module. Configure the attached device for 1.25 Gbit/s operation if required and monitor link status and diagnostic parameters via DDM where supported. Use proper ESD precautions when handling the transceiver.
What to consider before purchase
Ensure your equipment supports SFP modules and the LVPECL data interface if required
Verify singlemode fiber and LC‑simplex connector compatibility
Confirm 20 km reach meets your link distance requirements
Check that the 1310 nm TX / 1550 nm RX wavelength pair fits your network plan
Usage recommendations
For reliable operation, install the module in devices with compatible SFP slots, use singlemode fiber with LC‑simplex connectors, follow ESD handling procedures, and monitor link health via DDM. Ensure network transceivers at the remote end match the complementary wavelength configuration for BiDi operation.

## Specifications

| Feature | Value |
|---|---|
| Interface type | BiDi SFP |
| SFP transceiver type | Fiber optic |
| Single-mode fiber (SMF) supported | Yes |

### Network

| Feature | Value |
|---|---|
| Maximum data transfer rate | 1250 Mbit/s |

### Ports & interfaces

| Feature | Value |
|---|---|
| Fiber optic connector | LC |

### Technical details

| Feature | Value |
|---|---|
| Warranty period | 3 year(s) |

### Performance

| Feature | Value |
|---|---|
| Maximum transfer distance | 20000 m |
| Link budget | -22 dB |
| Rx wavelength (max) | 1330 nm |
| Rx wavelength (min) | 1290 nm |
| Tx wavelength (min) | 1290 nm |
| Tx wavelength (max) | 1330 nm |

### Power

| Feature | Value |
|---|---|
| Input voltage | 3.3 |

### Certificates

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

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Operating temperature (T-T) | 0 - 70 |

### Features

| Feature | Value |
|---|---|
| Digital Diagnostics Monitoring (DDM) | Yes |

## FAQ

### How much does the Lightwin SFP BiDi 1.25 Gbit 1310/1550nm 20 km cost, and is it available for purchase?

The price is 26.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 108 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 23.07.2026 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 Lightwin 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 Lightwin 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: maximum data transfer rate, maximum transfer distance, fiber optic connector, 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 Lightwin SFP BiDi 1.25 Gbit 1310/1550nm 20 km?

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/12368273/68487971_large.webp