# Digitus 100Gbs QSFP28 SR4 Optical Transceiver Fiber optic SFP28 100000 Mbit/s

**URL:** https://aio.lv/en/product--digitus-dn-81631--4960658
**Data updated:** 2025-12-29 17:46 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** DIGITUS
**Manufacturer code:** DN-81631
**EAN:** 4016032483427
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 82.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 68.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--digitus-dn-81631--4960658

## 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

The Digitus 100Gbs QSFP28 SR4 Optical Transceiver is designed for high-speed data transfer with a maximum rate of 100000 Mbit/s. It operates on a 3.3 V input voltage and has a typical power consumption of 3.5 W. Weighing 50 g, it is compact and efficient for fiber optic applications.

## Long description

The Digitus DN-81631 QSFP28 SR4 is a hot-pluggable, four-channel parallel fiber-optic transceiver designed for IEEE 802.3bm 100GBASE-SR4 applications and compatible with certain 40GbE and InfiniBand FDR/EDR links. It uses an 850 nm VCSEL laser array and an MPO connector receptacle to support multimode fiber links, offering aggregate data throughput up to 100 Gbit/s (4 × 25 Gbit/s nominal per lane, up to 26 Gbit/s per channel) and reach up to 70 m over OM3 and 100 m over OM4 multimode fiber. The module is RoHS compliant, supports digital diagnostics, and operates from a 3.3 V supply with typical power consumption below 3.5 W.
Advantages
The QSFP28 SR4 module provides four independent full-duplex channels in a single hot-pluggable QSFP form factor, increasing port density and reducing overall system cost. Low power consumption and a compact 3.3 V design simplify thermal and power planning. Built-in digital diagnostics enable real-time monitoring of optical and electrical parameters.
Suitable for
100GBASE-SR4 multimode fiber links in data centers and aggregation layers
High-density switch and router ports where space and power efficiency are required
Parallel fiber applications using MPO ribbon cables
Compatibility scenarios with 40GbE or InfiniBand FDR/EDR where supported
Key specifications
Manufacturer: DIGITUS, model DN-81631
Form factor: QSFP28, hot-pluggable
Data rate: up to 100 Gbit/s aggregate (up to 26 Gbit/s per channel)
Wavelength: 850 nm VCSEL
Reach: up to 70 m on OM3 MMF, up to 100 m on OM4 MMF
Connector: MPO receptacle
Power supply: 3.3 V; power consumption \<3.5 W
Operating case temperature: 0°C to +70°C
Compliance: RoHS 6
How to use
Insert the QSFP28 SR4 module into a compatible QSFP28 port on a switch, router or host adapter while the system is powered on (hot-pluggable). Connect an MPO/MT-RJ ribbon multimode fiber cable to the module's MPO receptacle, ensuring correct polarity and alignment. Verify link status and diagnostics through the host device's management interface and monitor the digital diagnostic outputs for optical power, temperature and voltage parameters.
Usage recommendations
Use OM3 or OM4 multimode fiber with an MPO connector for best performance; ensure fiber polarity and cleanliness before insertion. Observe the module's operating temperature range and provide adequate cooling in high-density deployments. Confirm compatibility with the host system firmware and transceiver support lists to avoid interoperability issues.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP28 |
| Maximum data transfer rate | 100000 Mbit/s |
| Networking standards | IEEE 802.3bm |
| Wavelength | 850 nm |
| Fiber optic connector | QSFP |
| Maximum transfer distance | 70 m |
| Digital Diagnostics Monitoring (DDM) | Yes |
| Multi-mode fiber (MMF) supported | Yes |
| SFP transceiver standard | SR4 |

### Network

| Feature | Value |
|---|---|
| SFP transceiver type | Fiber optic |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | China |
| UK Trade Tariff code | 85176200 |

### Operational conditions

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

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 3.5 W |
| Input voltage | 3.3 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 69.167 g |
| Package depth | 900 mm |
| Package width | 100 mm |
| Number of products included | 1 pc(s) |
| Package volume | 2610 cm³ |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.05 kg |

### Sustainability

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

## FAQ

### How much does the Digitus 100Gbs QSFP28 SR4 Optical Transceiver cost, and is it available for purchase?

The price is 82.99 € (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 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, Installment. All transactions are 100% secure and encrypted.

### Can Digitus 100Gbs QSFP28 SR4 Optical Transceiver be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 DIGITUS 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 DIGITUS 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: interface type, maximum data transfer rate, 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 Digitus 100Gbs QSFP28 SR4 Optical Transceiver?

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/4960658/54790137_large.webp