Optical transceivers: Flexible fiber optic connections for professional networks
Optical transceivers are essential components for modern corporate networks—they enable data transmission via fiber optics at high speeds and over long distances. Whether single-mode transceivers for long distances or multimode transceivers for shorter distances: the right choice ensures scalability, efficiency, and investment security in your IT infrastructure.
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Ruckus E100G-QSFP28-LR4L-2KM - QSFP28 transceiver module - 100 Gigabit Ethernet - 100GBase-LR4 Lite - LC single-mode - up to 2 km
Intel Dual Rate 10GBASE-SR/1000BASE-SX Optical Transeiver Intel SFP+ 10GbE LC-LC 850nm MM AFBR-709DMZ-IN2
Four channel 40 Gigabit optical transceiver (QSFP). Supports link lengths of 100m and 150m respectively on OM3 and OM4 multimode fiber cables., compatible
HPE Ethernet 1x400Gb QSFP112 1-port Multi-mode 50m NIC-side Flat-Top Transceiver - compatible
1-port 10GBASE CWDM Small Form-Factor Pluggable (SFP+) Optics Module, Single Mode Fiber (SMF), 70km, 1531 nm, LC Connector, Digital Diagnostic Monitor (DDM).
QSFP 40GBase Optics, up to 10km Transmission on Parallel single mode (4X10GE LR up to 10km)
TAA Compliant SFP form factor, SX 1Gb optical transceiver, 550m reach on OM2 MMF, duplex LC, IEEE 802.3z 1000BASE-SX compliant, compatible
1-port 1000BASE-LX Small Form-Factor Pluggable (SFP) Optics Module, Single Mode Fiber (SMF), 10 km, 1310 nm, LC Connector, Digital Diagnostic Monitor (DDM), Extended Temperature -40/85C., compatible
Small Form Factor Pluggable 1000Base-LH Gigabit Ethernet Optic Module - Extended Temp
10GBASE-LRM SFP+ GBIC (Long Reach Multimode for OM1/OM2, also compatible with OM3/OM4)
SFP 10GE pluggable transceiver, SMF, 1310nm for 10KM transmission, compatible
CIENA - SFP (mini-GBIC) transceiver module - 1GbE - up to 80 km - 1490 (TX) / 1590 (RX) nm
Ruckus - SFP (mini-GBIC) transceiver module - GigE - 1000Base-LX - LC, compatible
What is an optical transceiver?
An optical transceiver converts electrical signals into light signals and transmits them via fiber optic cables. The transceiver modules are interchangeable and are typically used in network components such as switches, routers, or firewalls.
Differences exist depending on:
- Transmission rate (e.g., 1G, 10G, 25G, 100G, 400G)
- Form factor (SFP, SFP+, QSFP, QSFP28, QSFP-DD, etc.)
- Range (multimode up to approx. 550 m, singlemode up to 40 km+)
Form factors at a glance: SFP, QSFP & Co.
Different designs are used depending on network requirements:
SFP & SFP+
- SFP (1G SFP): Standard for Gigabit connections
- SFP+ (10G SFP): For 10 Gigabit Ethernet – compact, energy-efficient, and widely used
- SFP28 (25G SFP28): For modern data centers and backbone connections
- SFP56: Supports 50 Gbit/s – for high-throughput applications
- SFP-DD: Double density for two signals in the smallest of spaces
QSFP formats for higher bandwidths
- QSFP (40G QSFP): 4x10G – established in core and aggregation layers
- QSFP28 (100G QSFP28): Standard module for 100G backbone connections
- QSFP-DD (200G/400G QSFP-DD): Eight-channel high-performance transceivers – for hyperscale networks
- QSFP56: Supports 200 Gbit/s via 4x50G – future-proof solution for data centers
Singlemode vs. Multimode Transceivers: When to use which?
Single-mode transceivers
- Ideal for long distances (up to 40–80 km)
- Low attenuation and long range
- Use in wide area networks or between buildings
Multimode transceiver
- Cost-effective for shorter distances (up to approx. 500 m)
- Lower installation costs thanks to inexpensive OM3/OM4 fibers
- Frequently used in server rooms and building networks
Tip: When selecting a transceiver, make sure it is compatible with your switch or router. Most manufacturers provide compatibility lists or recommendations.
Frequently asked questions about optical transceivers
What is the difference between SFP and SFP+?
Both formats are identical in design, but differ in speed: SFP supports 1 Gbit/s, SFP+ up to 10 Gbit/s.
Are optical transceivers compatible across manufacturers?
Many devices only accept transceivers with the correct code. it-market therefore offers compatible alternatives to OEM modules that are fully functional and tested – e.g., 100G QSFP28 for Cisco, HPE, or Dell.
What does “hot-swappable” mean?
Transceivers can be replaced during operation – without restarting the system. This minimizes downtime during maintenance or expansion.
Optical transceivers: new, used, and refurbished at it-market
At it-market, you will find a wide selection of optical transceivers – in all form factors and speeds. Whether 1G SFP, 10G SFP+, 25G SFP28, 100G QSFP28, or 400G QSFP-DD: we carry tested new and used goods as well as refurbished modules.
Benefit from:
- 3-year warranty for companies
- Up to €2,500 buyer protection
- Short delivery times
Do you have any questions? Our sales team will be happy to answer any questions you may have about IT hardware and IT remarketing.