# QSFP Transceiver Module BlueOptics QSFP-40G-ESR4-FR-BO 40 Mbit/s 850 nm

**URL:** https://aio.lv/en/product--blueoptics-qsfp-40g-esr4-fr-bo--6185020
**Data updated:** 2026-03-07 15:15 (EET)
**Category:** Network Media Converters
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP-40G-ESR4-FR-BO
**EAN:** 4063232074801
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 119.49 €
**Prices and availability valid until:** 2026-08-27 23:59
**Price without VAT (21%):** 98.75 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp-40g-esr4-fr-bo--6185020

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.08.2026 | free |
| Pickup points | 28.08.2026 | 1.79 EUR |
| Courier delivery to door | 28.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics QSFP-40G-ESR4-FR-BO is a fiber optic transceiver module designed for high-speed data transfer. It supports a maximum data rate of 40 Mbit/s and operates at a wavelength of 850 nm. With a mean time between failures (MTBF) of 1,000,000 hours, it ensures reliability and longevity. Weighing only 40 g, this compact module is ideal for various networking applications.

## Long description

The BlueOptics QSFP-40G-ESR4-FR-BO is a QSFP fiber optic transceiver module designed for 40 Gigabit Ethernet links over multimode fiber. It supports a maximum data rate of 40 Mbit/s at an operating wavelength of 850 nm and a maximum link distance of up to 300 m using MTP/MPO connectors. The compact module weighs approximately 40 g and includes support for digital diagnostics (DDM/DOM) to monitor supply voltage, laser bias current, transmitter output power, received input power and temperature in real time. The module is designed to comply with QSFP MSA mechanical and electrical specifications for broad interoperability with network switches, routers, storage systems and other devices that accept QSFP-40G transceivers.
Advantages
This BlueOptics QSFP transceiver provides standardized QSFP form-factor compatibility and MTP/MPO multimode fiber connectivity for short-range 40G links, offering reliable performance with an MTBF of approximately 1,000,000 hours. Integrated digital diagnostics simplify maintenance and fault finding by reporting electrical and optical parameters. The small, hot-pluggable module supports common high-speed protocols such as Ethernet and Fibre Channel over Ethernet and is built to industry standards for CE and RoHS compliance.
Suitable for
 40 Gigabit Ethernet uplinks between switches and aggregation equipment
 High-speed interconnects in data center switch-to-switch fabrics
 Connections between routers, storage arrays and server clusters over multimode fiber
 Short-range fiber links in enterprise and campus networks (up to 300 m)
Key specifications
 Maximum data transfer rate: 40 Mbit/s
 Wavelength: 850 nm (transmit and receive)
 Maximum transfer distance: up to 300 m over multimode fiber
 Interface type: 40 Gigabit Ethernet (QSFP)
 Fiber connector: MTP/MPO
 Digital Diagnostics Monitoring (DDM/DOM) support
 Typical weight: 0.04 kg
 Compliance: QSFP MSA mechanical/electrical profile, CE and RoHS
How to use
Install the BlueOptics QSFP-40G-ESR4-FR-BO into a compatible QSFP slot on your network device while the device is powered on or per the vendor's hot-plug guidance. Connect an appropriate MTP/MPO multimode fiber patch cord to the transceiver and to the destination device or patch panel. Ensure the host hardware supports 40G QSFP transceivers and, if you require DDM/DOM telemetry, verify that the host exposes those diagnostics. Follow the equipment vendor's instructions for port configuration and link negotiation to enable the 40G link.
Usage recommendations
For optimal performance, use high-quality multimode fiber and MTP/MPO patch cords rated for 850 nm transmission, keep optical connectors clean and verified, and confirm your switch/router platform firmware supports 40GBASE-ESR4 QSFP modules and DDM functions. If interoperability is critical, test the transceiver in your hardware before wide deployment.

## Specifications

| Feature | Value |
|---|---|
| Interface type | QSFP |
| Ethernet LAN | Yes |
| Number of products included | 1 pc(s) |
| SFP transceiver type | Fiber optic |
| Multi-mode fiber (MMF) supported | Yes |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 50 g |

### Packaging content

| Feature | Value |
|---|---|
| Manual | Yes |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 70 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.04 kg |

### Ports & interfaces

| Feature | Value |
|---|---|
| Fiber optic connector | MTP/MPO |

### Performance

| Feature | Value |
|---|---|
| Mean time between failures (MTBF) | 1000000 h |
| Rx wavelength (max) | 850 nm |
| Tx wavelength (max) | 850 nm |
| Wavelength | 850 nm |
| Maximum transfer distance | 300 m |

### Network

| Feature | Value |
|---|---|
| Ethernet interface type | 40 Gigabit Ethernet |
| Maximum data transfer rate | 40 Mbit/s |

## FAQ

### How much does the QSFP Transceiver BlueOptics QSFP-40G-ESR4-FR-BO cost, and is it available for purchase?

The price is 119.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 86 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 25.08.2026 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 BlueOptics 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 BlueOptics 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: wavelength, maximum transfer distance, maximum data transfer rate, 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.

## Image

https://aio.lv/img/cache/product/6185020/54616308_large.webp