Fiber Optics · Media Converters
Gigabit RJ45 to SFP Media Converter
Product DescriptionThe KONGIA KG-FMC-1G-SFP converter connects copper Ethernet networks to optical fiber through an RJ45 10/100/1000 Mbps port and an SFP slot of 1.25 Gb/s. The transceiver is selected separately to match fiber type, wavelength, connector and reach to each installation.
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The KONGIA KG-FMC-1G-SFP converter connects copper Ethernet networks to optical fiber through an RJ45 10/100/1000 Mbps port and an SFP slot of 1.25 Gb/s. The transceiver is selected separately to match fiber type, wavelength, connector and reach to each installation. Supports single-mode, multimode or single-fiber single-mode links with a compatible BiDi SFP.
The Ethernet port automatically negotiates speed, full/half duplex and MDI/MDI-X. The device includes QoS, broadcast storm suppression, IEEE 802.3x flow control and back pressure. Store-and-forward operation, the 2K MAC table, 1 Mbit buffer and jumbo frames up to 9 Kbytes manage traffic with latency ≤ 20 μs. Includes port protection up to 4 kV and optical link isolation.
Its black metal housing with external power supply measures 94 × 70 × 26 mm and weighs 0.15 kg. Includes a 5 V / 1 A adapter with US plug and 100–240 V AC input. Consumes 0.75–3 W and operates between −10 °C and +55 °C. Copper distance is up to 100 m; optical reach depends on the SFP and link budget.
Recommended Applications
Connection of IP cameras, computers, wireless access points or VoIP phones as remote Ethernet devices.
Adaptation to single-mode, multimode or BiDi fiber by selecting a compatible SFP.
Interconnection with another converter or compatible optical switch; the second device and optical modules are purchased separately.
An additional switch is required to connect several Ethernet devices simultaneously: the converter has a single RJ45 port.
Key Benefits
- Gigabit RJ45 + SFP: 1 port of 10/100/1000 Mbps and 1 optical slot of 1.25 Gb/s.
- Fiber to suit the project: Selection of single-mode, multimode or BiDi SFP
- reach according to module and link.
- QoS and flow control: IEEE 802.1p, IEEE 802.3x, back pressure and broadcast storm suppression.
- 9K jumbo frames and low latency: Buffer of 1 Mbit, 2K MAC table and latency ≤ 20 μs.
- 4 kV protection: Port surge protection and optical link isolation.
- Compact and efficient: 94 × 70 × 26 mm, 150 g, consumption of 0.75–3 W and included 5 V / 1 A adapter.
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Technical Specifications
SKUKG-FMC-1G-SFP
BrandKONGIA
SKUKG-FMC-1G-SFP
ProductGigabit media converter with 1 RJ45 port and 1 SFP slot
Commercial configuration1 desktop device with external power supply
Ethernet conversion10/100/1000BASE-T to 1000BASE-SX/LX
Copper port1 × RJ45 10/100/1000 Mbps with autonegotiation
Optical port1 × SFP slot of 1.25 Gb/s, full duplex
Autonegotiation10/100/1000 Mbps speed, MDI/MDI-X and full/half duplex on copper
Copper cableUTP Cat.5e or higher
Copper reachUp to 100 m
SFP moduleNot included; selected separately according to fiber and reach
Fiber types according to moduleSingle-mode 9/125 μm; multimode 50/125 μm or 62.5/125 μm
Single-fiber single-modeSupported with an appropriate BiDi SFP module
Wavelengths850 / 1310 / 1490 / 1550 nm, depending on the selected module
Optical reach550 m to 100 km, depending on SFP module, fiber type and optical budget
Optical connectorDetermined by the installed SFP module
Ethernet standardsIEEE 802.3 (10BASE-T), IEEE 802.3u (100BASE-TX/FX), IEEE 802.3ab (1000BASE-T), IEEE 802.3z (1000BASE-SX/LX)
Additional standardsIEEE 802.3x (flow control), IEEE 802.1Q (VLAN), IEEE 802.1p (QoS), IEEE 802.1D (Spanning Tree)
QoSSupported, to prioritize packet transmission
Broadcast stormsBroadcast storm suppression
Flow controlIEEE 802.3x and back pressure
Jumbo framesUp to 9 Kbytes
ForwardingStore-and-forward
MAC table2K addresses
Frame memory1 Mbit
Network latency≤ 20 μs
Port protectionSurge protection up to 4 kV
IsolationIsolation between copper and fiber media
LED indicatorsOptical/electrical link and activity status; the panel shows 1000/100, FX/TX, Link/Act, FDX and PWR
Included adapter5 V DC / 1 A, US plug
Adapter input100–240 V AC, 50/60 Hz
Operating voltage5 V DC
Power connector for this versionDC barrel jack, center positive
Power consumption0.75–3 W
Thermal designLow-power chip, ventilated housing and low heat generation
Operating temperature−10 °C to +55 °C
Storage temperature−40 °C to +70 °C
Operating humidity5–90 %, non-condensing
Device weight0.15 kg, externally powered version
Housing and colorMetal, black
Adapter plug optionsUS plug as standard; Chinese or European plugs optional
Dimensions per unit94 × 70 × 26 mm (depth × width × height)
KONGIA warranty2 years
Packaging1 × Gigabit RJ45-to-SFP converter, externally powered version
1 × 5 V DC / 1 A adapter, 100–240 V AC 50/60 Hz input, US plug
Installation Guide
SFP module and fiber cable not included. European or Chinese plug optional.
Technical Documentation
Download the official datasheet and certified PDF resources for projects and tenders.
Frequently Asked Questions
Quick answers to help you select and request this product.
Is the SFP module included?
No. The SFP module is selected and sold separately according to fiber type, connector, wavelength and distance.
What reach does it support?
Up to 100 m on copper and 550 m to 100 km over fiber, depending on the selected SFP, fiber type and optical budget.
Does it support single-mode or multimode fiber?
Yes, with the compatible module. It also supports single-fiber single-mode using an appropriate BiDi SFP.
What power supply is included?
A 5 V DC / 1 A adapter with US plug and 100–240 V AC input, 50/60 Hz. European or Chinese plugs are offered as options.
What are its size and weight?
This externally powered version measures 94 × 70 × 26 mm and the device weighs 0.15 kg.
What traffic functions does it support?
QoS, broadcast storm suppression, IEEE 802.3x flow control and back pressure, 9 Kbyte jumbo frames, 2K MAC table and 1 Mbit buffer.
What protection and latency does it offer?
Port surge protection up to 4 kV and network latency ≤ 20 μs.
Can several devices be connected to the RJ45 port?
It has a single RJ45 port. Use an additional switch for multiple devices.
Are SC, FC and ST integrated ports on this SKU?
This device has an SFP slot. The optical connector is determined by the installed transceiver, purchased separately.
What is the KONGIA warranty?
KONGIA provides a 2-year warranty against manufacturing defects.
Choosing this model
For projects selecting their optical interface through an SFP module.
Before ordering: Confirm a compatible module, fiber type, speed and whether the SFP is included or ordered separately.
Compare alternatives: Ethernet to Fiber Media Converters →
How to choose a Gigabit media converter →
SFP vs. SC BiDi media converters: choosing a complete link →
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