# DAC cable CBO QSFP28-DAC-3M-PA-BL — QSFP28 3 m, 100 Gbit/s direct-attach

**URL:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-pa-bl--4466860
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** QSFP28-DAC-3M-PA-BL
**EAN:** 4063232102030
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-qsfp28-dac-3m-pa-bl--4466860

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 11.08.2026 | free |
| Pickup points | 14.08.2026 | 1.89 EUR |
| Courier delivery to door | 14.08.2026 | 4.99 EUR |

## Summary description

CBO QSFP28-DAC-3M-PA-BL is a 3-meter QSFP28 direct-attach copper (DAC) cable designed for 100 Gbit/s connections. It provides a low-latency, low-power wired link between QSFP28 ports in switches, routers or network appliances. Suitable for short-reach server-to-switch and switch-to-switch links where a reliable, cost-effective 100 Gbit/s connection is required.

## Long description

CBO QSFP28-DAC-3M-PA-BL is a 3-metre direct-attach copper (DAC) cable engineered for 100 Gbit/s links between QSFP28 ports. The passive copper assembly provides a point-to-point wired connection with minimal latency and low power consumption, intended for short-reach interconnects inside racks or across adjacent racks in data centre and enterprise networks. The cable is compatible with QSFP28 ports on switches, routers and network appliances that accept standard passive DAC modules.
Advantages
The DAC cable offers a cost-effective alternative to optical transceivers for short-distance 100 Gbit/s links, eliminating the need for separate SFP/QSFP optical modules and fibre patch cords. Passive construction reduces power draw compared with active optical solutions and introduces negligible signal processing delay, helping to maintain low latency for server-to-switch and switch-to-switch traffic. Its 3 m length provides a balance between reach and cable management within rack environments.
Suitable for
 Server-to-switch connections inside the same rack or neighbouring racks
 Short-distance switch-to-switch uplinks within data centre rows
 High-bandwidth appliance interconnects where 100 Gbit/s throughput is required
 Environments prioritising low latency and low power consumption
Key specifications
 Connector type: QSFP28 to QSFP28 direct-attach copper
 Length: 3 metres
 Nominal data rate: 100 Gbit/s (supporting aggregated 4x25G lanes)
 Construction: Passive copper twinax cable assembly
 Typical use: Short-reach, within-rack or adjacent-rack interconnects
 Latency: Minimal, passive signal path
 Power: Low power consumption compared with active optical modules
How to use
Insert each QSFP28 connector into the corresponding QSFP28 port until the latch clicks, ensuring correct alignment. Verify link negotiation and speed on connected devices according to their management interface or LEDs. For safe handling, avoid tight bends and excessive pulling on the cable; maintain manufacturer-recommended bend radius and secure the cable to reduce strain. If replacing or installing multiple DACs, perform one link at a time and confirm network status before proceeding to the next connection.
Usage recommendations
Use this passive DAC for short-distance 100 Gbit/s links inside racks or between adjacent racks. Confirm compatibility with the switch or appliance vendor’s supported transceiver list if firmware-based validation is enforced. Store and route the cable away from sources of electromagnetic interference and avoid repeated sharp bends to preserve signal integrity.

## FAQ

### How much does the CBO QSFP28-DAC-3M-PA-BL QSFP28 3 m 100 Gbit/s cost, and is it available for purchase?

The price is 134.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 336 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 11.08.2026 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

https://aio.lv/img/cache/product/4466860/59855552_large.webp