# SFP BiDi Transceiver Lightwin LWO-SFP-3155-40, 1.25 Gbit, 1310nm TX / 1550nm RX, 40 km, DDM, LC-Simplex, Singlemode, DFB

**URL:** https://aio.lv/en/product--lightwin-lwo-sfp-3155-40--12368274
**Data updated:** 2026-04-21 17:33 (EEST)
**Category:** Network Media Converters
**Manufacturer:** Lightwin
**Manufacturer code:** LWO-SFP-3155-40
**EAN:** 9120117656875
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 46.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 38.42 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lightwin-lwo-sfp-3155-40--12368274

## 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 LWO-SFP-3155-40 is a 1.25 Gbit BiDi fiber SFP transceiver for singlemode links. It transmits at 1310 nm and receives at 1550 nm, supports distances up to 40 km, DDM for diagnostics, LC-simplex connector and uses a DFB laser. Rated for 3.3 V input and RoHS compliant, it suits long-reach Ethernet and telecom applications.

## Long description

Lightwin LWO-SFP-3155-40 is a 1.25 Gbit/s BiDi SFP transceiver designed for singlemode fiber links. It transmits at 1310 nm and receives at 1550 nm, supports link distances up to 40 km, provides digital diagnostic monitoring (DDM), and uses an LC-simplex connector. The module operates from a single +3.3 V supply and employs a DFB laser for stable long-reach transmission.
Advantages
The transceiver combines bidirectional single-fiber operation with a compact SFP form factor, enabling 1.25 Gbit/s connectivity over long distances without requiring separate fibers for transmit and receive. It offers LVPECL-compatible I/O, low electromagnetic emissions, ESD protection, and compliance with laser safety and RoHS standards. Diagnostic monitoring (DDM) allows status and performance checks of the optical link.
Suitable for
Long-reach Gigabit Ethernet links over singlemode fiber
Telecom and metro access applications requiring single-fiber BiDi connectivity
Network equipment with SFP slots using LC-simplex connectors
Environments where DDM status and diagnostics are needed
When it may not be suitable
This module is not suitable for multimode fiber networks or links that require separate Tx and Rx fibers at symmetric wavelengths. It is intended for 1.25 Gbit/s applications; it will not provide higher data rates required by 10 Gbit/s networks.
Key specifications
Data rate: up to 1.25 Gbit/s (1250 Mbit/s)
Transmit wavelength: 1310 nm (DFB laser)
Receive wavelength: 1550 nm (PIN photodetector)
Maximum reach: up to 40 km over singlemode fiber
Connector type: LC simplex
Power supply: +3.3 V single supply
Interface compatibility: LVPECL-compatible data I/O
Standards: IEC-60825 laser safety compliant; RoHS and SFF-8472 compatible
How to use
Install the SFP module into a compatible SFP slot on your switch, media converter, or transceiver-capable device, ensuring proper orientation until it latches. Connect a singlemode LC-simplex patch cable between modules at each end of the link. Verify the device recognizes the module and check DDM/diagnostic registers to confirm optical power, temperature, and status. Use equipment settings to match link speed (1.25 Gbit/s) and monitor link health during operation.
What to consider before purchase
Ensure your network devices support SFP modules and the LC-simplex connector
Confirm singlemode fiber infrastructure and that bidirectional (BiDi) single-fiber operation fits your topology
Verify required link distance does not exceed 40 km
Check that 1.25 Gbit/s speed meets your throughput needs
Usage recommendations
The module is intended for installation in powered, ESD-protected environments; handle the transceiver by its housing and avoid touching the optical interface. Use appropriate singlemode LC simplex patch cords, verify polarity and cleanliness of connectors, and monitor DDM values after deployment to ensure stable long-reach 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 | 40000 m |
| Link budget | -22 dB |
| Rx wavelength (max) | 1320 nm |
| Rx wavelength (min) | 1290 nm |
| Tx wavelength (min) | 1290 nm |
| Tx wavelength (max) | 1320 nm |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 11.8 mm |
| Width | 56.5 mm |
| Depth | 13.7 mm |

### 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 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 181 g |
| Package depth | 120.65 mm |
| Package height | 30.48 mm |
| Package width | 69.85 mm |

## FAQ

### How much does the Lightwin LWO-SFP-3155-40 SFP BiDi 1.25 Gbit cost, and is it available for purchase?

The price is 46.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 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 LWO-SFP-3155-40 SFP BiDi 1.25 Gbit?

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/12368274/68487969_large.webp