# Network transceiver module Chelsio 40GBASE-SR4 QSFP+ Fiber optic 40000 Mbit/s

**URL:** https://aio.lv/en/product--chelsio-sm40g-sr--1919236
**Data updated:** 2026-03-11 11:42 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** Chelsio
**Manufacturer code:** SM40G-SR
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 83.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 69.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--chelsio-sm40g-sr--1919236

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Chelsio 40GBASE-SR4 QSFP+ fiber optic network transceiver module supporting QSFP interface and a maximum data transfer rate of 40000 Mbit/s. Designed for short-range multimode fiber links, it complies with MSA certification and is intended for high-speed Ethernet connectivity in data centers, switches and server uplinks.

## Long description

Chelsio 40GBASE-SR4 QSFP+ fiber optic transceiver module provides 40 Gbit/s short-range multimode connectivity for data center, switch and server uplink environments. The module uses a QSFP interface and is designed for multimode fiber links, offering MSA-compliant form factor and signaling for reliable 40GbE connections over short distances. It is intended for use where high-density, high-throughput Ethernet interconnects are required.
Advantages
This Chelsio QSFP+ transceiver supports a 40GBASE-SR4 physical layer, enabling four-lane 10 Gbit/s operation over multimode fiber for aggregated 40 Gbit/s throughput. The module’s standardized QSFP form factor allows compatible mounting in switches, routers and server NICs that accept QSFP optics. MSA compliance and adherence to the 40GBASE-SR4 specification ensure interoperability with other 40GbE equipment when connected over appropriate multimode fiber types. The small QSFP package contributes to high port density in rack-mounted networking equipment.
Suitable for
Short-range multimode fiber links inside data centers
40GbE uplinks between switches and aggregation devices
Server-to-switch high-speed connections using QSFP ports
Key specifications
Interface type: QSFP (Quad Small Form-factor Pluggable)
Maximum data transfer rate: 40000 Mbit/s (40 Gbit/s)
Optical type: multimode fiber support for short-range links
Form factor: QSFP+ compact transceiver suitable for high-density ports
Standard compliance: 40GBASE-SR4 physical layer specification (MSA-compliant)
How to use
Install the Chelsio QSFP+ transceiver into a compatible QSFP port on a switch, router or network adapter while the host device is powered according to vendor guidelines. Connect appropriate multimode fiber cables to the transceiver’s MPO/MTP or compatible connector, ensuring correct orientation and secure latch. Verify link status and negotiate 40GbE operation through the host device management interface or operating system. Use fiber patching and distance limits that match the 40GBASE-SR4 specification and the multimode fiber grade in use.
Usage recommendations
Use OM3 or OM4 multimode fiber to achieve recommended short-range distances for 40GBASE-SR4. Maintain clean fiber endfaces and follow ESD precautions when handling the transceiver. Confirm host device firmware and driver compatibility with Chelsio QSFP+ optics to ensure full 40GbE performance and interoperability.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | QSFP |
| Maximum data transfer rate | 40000 Mbit/s |
| Auto MDI/MDI-X | Yes |
| Fiber cable diameters supported (core/cladding) | 50/125, 62.5/125 |
| Multi-mode fiber (MMF) supported | Yes |
| SFP transceiver standard | SR |

### Network

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

### Features

| Feature | Value |
|---|---|
| Hot-Plug support | Yes |

### Certificates

| Feature | Value |
|---|---|
| Certification | MSA |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 10 - 80 |
| Storage temperature (T-T) | -40 - 85 |
| Operating temperature (T-T) | 0 - 70 |
| Storage relative humidity (H-H) | 10 - 85 |

## FAQ

### How much does the Chelsio 40GBASE-SR4 QSFP+ network transceiver cost, and is it available for purchase?

The price is 83.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 14.07.2026 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 Chelsio 40GBASE-SR4 QSFP+ network 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 Chelsio 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 Chelsio 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, 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/1919236/54590600_large.webp