Multi-Vendor Compatible QSFP-SFP-CONV Adapter Module: QSFP-SFP-CONV
QSFP+ to SFP+ Adapter Overview
The QSFP-SFP-CONV converts a single QSFP+ port into an SFP+ port, letting a host switch or router accept SFP+ optical transceivers or SFP+ direct attach copper modules through a QSFP+ cage. The host side follows the SFF-8436 QSFP+ MSA; the module side follows the SFF-8431 SFP+ MSA. Data rates span 1.25 to 10.31 Gbps, with 10G Ethernet as the documented application, and DDM/DOM monitoring passes through to the host. This is a single-lane conversion adapter, not a 40G-to-4x10G breakout cable. It exposes one SFP+ port from one QSFP+ cage; a breakout cable splits a 40G port into four independent 10G lanes. Confirm which one matches the deployment need before ordering.
- Adapter Type: QSFP+ to SFP+
- Input Form Factor: QSFP+
- Output Form Factor: SFP+
- Supported Data Rate: 1.25 Gbps - 10.31 Gbps
- DDM/DOM: Supported
- Temperature Range: Standard 0°-70°C
- FEC Support: Not Supported
Pricing & Availability
SKU:QSFP-SFP-CONV
In Stock - Ships Next Business DayMulti-Vendor Compatible QSFP-SFP-CONV Adapter Module Specification
Adapter Type | QSFP+ to SFP+ |
Input Form Factor | QSFP+ |
Output Form Factor | SFP+ |
Supported Data Rate | 1.25 Gbps - 10.31 Gbps |
Supported Applications | 10G Ethernet (10.31Gbps) |
DDM/DOM | Supported |
Temperature Range | Standard 0°-70°C |
Power | +3.3V single power supply |
Power Consumption (Max) | 0.25 W |
FEC Support | Not Supported |
Compliance | CE, RoHS, SFF-8431, QSFP+ MSA, SFP+ MSA |
Multi-Vendor Compatible QSFP-SFP-CONV Adapter Module Datasheet
v3Complete technical specifications and product details
Multi-Vendor Compatible QSFP-SFP-CONV Adapter Module Description
The QSFP-SFP-CONV is a passive QSFP+ to SFP+ adapter. It converts a single QSFP+ port on a host switch or router into an SFP+ port, so a QSFP+ cage can accept SFP+ optical transceivers or SFP+ direct attach copper modules.
The host side follows the SFF-8436 QSFP+ MSA electrical and mechanical interface. The module side follows the SFF-8431 SFP+ MSA, so standard SFP+ modules insert directly into the adapter once it is seated in the host QSFP+ cage.
The adapter carries data rates from 1.25 to 10.31 Gbps. The documented application is 10G Ethernet at 10.31 Gbps. The inserted SFP+ module's own rate rating determines the actual link speed, since the adapter itself does not add or convert signaling.
DDM/DOM monitoring is supported on this adapter, so Tx power, Rx power, temperature, and bias current from the inserted SFP+ module pass through to the host's diagnostics. This capability is specific to the QSFP-SFP-CONV; third-party QSFP+ to SFP+ adapters vary, and some do not pass DDM/DOM data at all, so that spec should be checked separately when comparing parts. The adapter runs on a single +3.3V supply with a maximum power draw of 0.25W and operates across a standard 0 to 70 degrees C range. FEC is not supported at the adapter level.
Compliance covers CE, RoHS, SFF-8431, the QSFP+ MSA, and the SFP+ MSA. Host platform support for third-party or multi-vendor QSFP+ to SFP+ adapters varies by switch vendor and firmware release. The adapter should be checked against the host switch's transceiver or optics compatibility matrix before deployment.
A QSFP+ to SFP+ adapter is not the same product as a 40G QSFP+ to 4x10G SFP+ breakout cable. This adapter exposes one SFP+ port from one QSFP+ cage and carries a single lane of traffic. A breakout cable splits the four lanes inside a 40G QSFP+ port into four independent 10G SFP+ connections at the far end. The adapter fits a deployment needing one SFP+ port from a QSFP+ cage. The breakout cable fits a deployment fanning a 40G port out to four separate 10G links.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For project-quantity pricing or platform-specific verification, contact our sales team.
Frequently Asked Questions
Is a QSFP+ to SFP+ adapter a reliable solution?
Reliability depends primarily on whether the host switch or router accepts a QSFP+ to SFP+ adapter at all. Some platforms recognize the adapter and the inserted SFP+ module without issue, and others restrict which QSFP+ accessories they accept. The host switch's transceiver or optics compatibility matrix should be checked before ordering, since acceptance is a platform-level decision rather than a property of the adapter alone.
What is the difference between this adapter and a 40G-to-4x10G breakout cable?
A QSFP+ to SFP+ adapter is a single-lane device. It exposes one SFP+ port from one QSFP+ cage, so only one transceiver's worth of traffic passes through it. A 40G-to-4x10G breakout cable is different hardware entirely; it splits the four independent lanes inside a 40G QSFP+ port into four separate 10G SFP+ connections. The adapter fits one SFP+ module into a QSFP+ cage. The breakout cable fans one 40G port out to four 10G links.