# QSFP Transceiver BlueOptics BO25K859S2D 40GBASE-SR4 Multimode Fiber 150 m

**URL:** https://aio.lv/en/product--blueoptics-qsfp-40g-sr4-zh-bo--5041212
**Data updated:** 2026-02-25 16:38 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP-40G-SR4-ZH-BO
**EAN:** 4063232245607
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 93.99 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 77.68 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp-40g-sr4-zh-bo--5041212

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.08.2026 | free |
| Pickup points | 20.08.2026 | 1.79 EUR |
| Courier delivery to door | 20.08.2026 | 4.99 EUR |

## Summary description

Compact QSFP transceiver BlueOptics BO25K859S2D supporting 40GBASE-SR4 over multimode fiber up to 150 m. Designed for short‑reach 40 Gigabit Ethernet links in data centers and enterprise networks. Hot‑pluggable QSFP form factor enables easy installation and replacement; suitable for spine/leaf switches, aggregation and server interconnects.

## Long description

BlueOptics BO25K859S2D is a compact QSFP transceiver engineered for short‑reach 40 Gigabit Ethernet links over multimode fiber. The module supports 40GBASE‑SR4 transmission up to 150 m on appropriate multimode cabling and fits hot‑pluggable QSFP form‑factor ports for straightforward installation and service in data center and enterprise network environments.
Advantages
The transceiver provides a high-density, low-power solution for 40G connectivity with a standardized QSFP interface that simplifies upgrades and replacements. Its multimode SR4 design enables parallel fiber transmission for low-latency, high-throughput links in spine/leaf, aggregation and server interconnect roles. Hot‑pluggability reduces downtime during maintenance while the compact module footprint conserves slot space in switches and optical equipment.
Suitable for
 Short‑reach 40 Gigabit Ethernet links in data centers
 Spine and leaf switch interconnects
 Server-to-switch high-speed connections
 Aggregation and distribution layer links within enterprise networks
Key specifications
 Standard: 40GBASE‑SR4 compatible
 Form factor: QSFP (hot‑pluggable)
 Media: Multimode fiber (parallel MPO/MTP interface)
 Maximum reach: up to 150 m on suitable multimode cabling
 Transmission speed: 40 Gbit/s aggregate
 Application: Short‑reach data center and enterprise links
How to use
Install the QSFP transceiver into a compatible QSFP port on your switch or server I/O card until it seats securely. Connect an appropriate multimode MPO/MTP patch cable to the transceiver, ensuring correct polarity and fiber type for 40GBASE‑SR4 operation. The module is hot‑pluggable, so it can be inserted or removed while the host equipment is powered, but follow host vendor instructions to avoid disruption. Verify link status and speed through the host device management interface after installation.
Usage recommendations
Use verified multimode cabling with recommended OM3/OM4 specifications and MPO/MTP connectors to achieve the listed reach. Ensure proper airflow and compliance with the host device’s thermal guidelines, and confirm transceiver compatibility with switch firmware or vendor compatibility lists before deployment.

## FAQ

### How much does the QSFP Transceiver BlueOptics BO25K859S2D 40GBASE-SR4 cost, and is it available for purchase?

The price is 93.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 423 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 17.08.2026 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

## Image

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