# MaxLink 40G QSFP+ SR4 optical module ML-QSFPSR4, multimode, 850nm, MPO-12, up to 100m

**URL:** https://aio.lv/en/product--maxlink-ml-qsfpsr4--12394704
**Data updated:** 2026-04-25 14:14 (EEST)
**Category:** Network Media Converters
**Manufacturer:** MaxLink
**Manufacturer code:** ML-QSFPSR4
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 58.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 48.34 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--maxlink-ml-qsfpsr4--12394704

## 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

40G QSFP+ SR4 optical transceiver MaxLink ML-QSFPSR4 for short-range multimode fiber links. Operates at 850 nm with MPO-12 connector, supporting distances up to 100 m over OM3/OM4 multimode fiber. Designed for data center and high-speed aggregation applications, providing 4-lane 10G parallel transmission for 40 Gigabit Ethernet.

## Long description

The MaxLink 40G QSFP+ SR4 optical module ML-QSFPSR4 is a short-range transceiver designed for 40 Gigabit Ethernet over multimode fiber. It operates at an 850 nm wavelength and uses an MPO-12 connector to provide 4x10G parallel transmission. The module supports digital diagnostics monitoring (DDM) and is compatible with a broad range of network equipment that accepts standard QSFP+ SR4 transceivers.
Advantages
This QSFP+ SR4 module delivers 40 Gbps aggregate bandwidth using 12-fiber MPO multimode connections and supports distances suitable for typical data centre and aggregation links over OM3/OM4 fiber. The 850 nm wavelength and UPC polished connector provide reliable short-range optical performance, while the built-in diagnostics function allows monitoring of operational parameters such as temperature and optical power.
Suitable for
40 Gigabit Ethernet links in data centres and server rooms
High-speed aggregation and spine-leaf network connections
Short-reach multimode fiber runs over OM3/OM4 up to approximately 100 m
When it may not be suitable
This module is intended for short-range multimode fiber and is not suitable for single-mode or long-haul links. It requires MPO-12 multimode cabling and will not function on legacy duplex LC multi-mode or single-mode fiber runs without appropriate breakout or conversion hardware.
Key specifications
Form factor: QSFP+
Aggregate data rate: 40 Gbps (4×10G parallel)
Wavelength: 850 nm
Connector type: MPO-12
Fiber type: Multimode (OM3/OM4 recommended)
Typical reach: up to 100 m over OM3/OM4 multimode fiber
Transmission: 12-fiber parallel
Connector polishing: UPC
Diagnostics: Digital Diagnostics Monitoring (DDM)
How to use
Install the module into a compatible QSFP+ port on a switch or host adapter, ensure the MPO-12 multimode cable is correctly aligned and secured, and verify link status via the device interface. Use OM3 or OM4 multimode fiber for reliable performance at the specified distances. Monitor module parameters through the switch or transceiver management interface that reports DDM values.
What to consider before purchase
Ensure your switches or network devices accept QSFP+ SR4 transceivers and support 40G operation
Confirm you have MPO-12 multimode cabling (OM3/OM4) and any required MPO breakout or fanout assemblies
Verify required link distance is within the module's multimode range (up to ~100 m on OM3/OM4)
Usage recommendations
Use OM3 or OM4 multimode fiber with properly rated MPO-12 connectors and maintain clean connector endfaces. Verify compatibility with your network equipment and monitor DDM parameters to detect link issues early.

## FAQ

### How much does the MaxLink 40G QSFP+ SR4 optical module ML-QSFPSR4 cost, and is it available for purchase?

The price is 58.49 € (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 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. 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 MaxLink 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 MaxLink 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

## Image

https://aio.lv/img/cache/product/12394704/68509787_large.webp