The 40G QSFP+ To 4SFP+ DAC Passive Cable over passive copper, which requires no additional power to ensure quality connectivity. This breakout cable is compliant with SFF-8436, SFF-8431 and SFP+ & QSFP MSA standards.
It provides a connection of a 40G QSFP+ port on one end and to four 10G SFP+ ports on the other end and is suitable for cost-effective close-range interconnections within the equipment room of telecom operators or data centers, etc.

This is a high-quality Generic Compatible 40G QSFP+ to 4 SFP+ Passive DAC (Direct Attach Cable) Copper cable. It is a cost-effective solution that provides high bandwidth and transmission rates over short distances. QSFP+ (Quad Small Form-factor Pluggable Plus) Cable Assemblies are suitable for very short distances and offer a highly cost-effective way to establish a 40-Gigabit link between QSFP+ ports of 4 SFP+ switches within racks and across adjacent racks. QSFP+ to 4x SFP+ copper DAC cable is a 40GBase QSFP+ hybrid passive cable. A side is a QSFP+ connector, B side is 4x SFP+ connectors. Each DAC cable is 100% optically inspected and tested for compatibility before shipping.

A direct attach cable, short for DAC cable, is a type of factory terminated twinax cable that connects directly into transceivers and can be brought in several lengths for short distances of up to 15 meters. These cables consist of fixed lengths of shielded copper coaxial or fiber optic cable with single pluggable transceivers at either end, that have varying gauge values between 24AWG and 30AWG. The DAC cable may be capable of interconnection up to 15 meters using a twinaxial copper cable and reaches 100 meters over an active optical cable at 10Gbps, 40Gbps or higher.

DAC Cables can be either passive or active. The passive direct attach cable has no electrical components, which results in less power consumption. Active direct attach cables are composed of electrical components, so they use more power, but gain more distance and increase signal strength. Active cables are more expensive and consume more power when in use compared to passive cables.

Generic DAC Cable Features & Specifications

• Copper Passive

• AWG30

• PVC (OFNR) Jacket

• Easy to Install

• Hot pluggable

• Low insertion loss

• RoHS Compliant

• Temperature Range: 0°C to 70°C

• Available in various lengths

Generic DAC Cable Options Available:

• 10G SFP+ to SFP+ DAC

• 25G SFP28 to SFP28 DAC

• 40G QSFP+ to QSFP+ DAC

• 40G QSFP+ to 4x SFP+ DAC

• 100G QSFP28 to 4x SFP28 DAC

• 100G QSFP28 to QSFP28 DAC

• 56G QSFP+ to QSFP+ DAC

Features

• Connector A: 1x QSFP 40Gbps Rated Connector (QSFP+ MSA SFF-8436 Compliant)
• Connector B: 4x SFP+ 10Gbps Rated Connector (SFP+ MSA SFF-8431 Compliant)
• Economically Links up a QSFP port with an upstream 10GbE-SFP+ Switch
• Compliant with IEEE 802.3ba 40GBASE-CR4 standard
• Up to 10.3125 Gbps transfer rate per SFP+ channel (40 Gbps aggregate)
• Bridge the gap between your 10G and 40G capable switches/host adapters
• High-Density QSFP 38-PIN and 4x SFP 20-PIN Connector
• Reduced power budget and lower port cost compared to transceiver and AOC
• RoHS Compliant and Lead-Free

Specification

Application

• 40G QSFP+ to 4×10SFP+

• 10G/40Gigabit Ethernet

• InfiniBand4x SDR, DDR, QDR

• Switches, Routers, and HBAs

• Data Centers

• Fiber Channel

Which things we Should Know Before Buying DAC Cable?

1. No matter in the related article or in the product description of some DACs vendors, there is always a point saying that the active DAC twinax cables are lighter and thinner than passive DAC cables. Actually, it is a wrong view of point. If you have a user experience of both active and passive DACs, you may find that there is no difference between them in the weight and appearance. 

2. As the first point mentioned, the thickness and weight do not depend on the active or passive function. In fact, they are divided according to their characteristic of AWG (American Wire Gauge). For instance, AWG24 DAC cable is thicker and heavier than the AWG30. Because of the difference of wire diameter, the longer the cable, the more inconvenience AWG24 DAC twinax cable is. Moreover, there is also a limited bend radius. Thus, the longer the distance, the higher the AWG rating should be. 

3. When the transmission distance is over 5 meters, active DAC cable is more suitable than passive DAC cable. Because it will cause the signal issue when using passive DAC cable for long-haul transmission.

FAQ:

Q:Can I have different compatibilities for each end of my direct attach cables?

A:Yes, you can. SEESUO.COM offers customized dual compatibility solutions for direct attach cables so that you can choose compatibilities for each end individually. All you need to do is to select "Dual Compatibility Solutions" option in Compatible Brands drop-down box and note down your devices' model numbers in custom page.

Q:What kinds of custom choices are offered in SEESUO.COM?

A:As for customized direct attach cables, SEESUO.COM offers regular custom choices such as compatibility, cable length, cable color, operating temperature, label pattern, label colors and etc. What's more, SEESUO.COM welcomes any inquiry for customized products and solutions for all need and specifications.