SBFTF Series

Stand-alone Fast Ethernet Media and Rate Converter
10/100Base-TX to 100Base-FX

SBFTF Series
  • SBFTF1014-105-1
  • SBFTF1040-105
  • SBFTF1039-105
  • SBFTF1014-105-768x768
  • SBFTF1013-105
  • SBFTF1011-105

The SBFTF Series is a that provides an interface between 10/100Base-TX ports and 100Base-FX ports, allowing users to integrate fiber optic cabling into 10/100 copper environments. Operating at Layer 2, the data link layer, this converter not only converts copper to fiber, it also provides rate conversion allowing legacy 10Base-T copper devices to connect to 100Base-FX fiber.

SBFTF Series

SBFTF Series Overview


  • Auto-Negotiation
  • Auto-MDI/MDIX
  • Link Pass Through
  • Far-End-Fault (FEF) Detection
  • Automatic Link Restoration Extend network distance up to 120km
  • Bridging devices will provide conversion and integration solutions for half and full-duplex environments
  • 10 Mbps or 100 Mbps on TP port
  • Half or full-duplex on all ports including fiber

SBFTF Series Tech Specs


    • IEEE 802.3

    Data Rate

    • 10 Mbps; 100 Mbps, Layer 2

    Filtering Addresses

    • 1K MAC addresses

    Filtering & Forwarding

    • 14,880 pps for Ethernet; Rate 148,800 pps for Fast Ethernet

    RAM Buffer

    • 512 KB

    Max Packet Size

    • 2044 bytes untagged; 2048 bytes tagged


    • SW1 (TP): Auto-Negotiation On/Off
    • SW2 (TP): Half or Full-duplex with Auto-Negotiation Off
    • SW3 (TP): 10Mbps or 100 Mbps with Auto-Negotiation Off
    • SW4 (Fiber): Half or Full-duplex
    • SW5: Link Pass Through On/Off
    • SW6: Far-End-Fault (FEF) On/Off

    Status LEDs

    • PWR (Power): ON = connection to external power
    • FD (Fiber Duplex): ON=Full-duplex; Off=Half duplex
    • LNK/ACT (Fiber Link/Activity): ON=Link; Blinking=Activity
    • CD (Copper Duplex): ON = Full-duplex; Off = Half-duplex
    • LNK/ACT (Copper Link/Activity): ON = Link; Blinking = Activity
    • 100 (Copper): Off = 10 Mbps; ON = 100 Mbps


    • Width: 3.25” [82.55 mm]
    • Depth: 4.8” [121.92 mm]
    • Height: 1″ [25 mm]

    Power Supply

    • External AC/DC; 12 VDC, 0.8A min


    • Operating: 0°C to 50°C
    • Humidity: 5% to 90% (non-condensing)
    • Altitude: 0 – 10,000 ft.


    • 2 lbs. [0.90 kg]


    • Greater than 41,660 hours (MIL-HDBD-217F)
    • Greater than 114,580 hours (Bellcore7 V5.0)


    • Safety: Wall Mount Power Supply: UL Listed; FCC Class A, VCCI Class 1, CISPR22/EN55022 Class A, EN55024, EN61000, CE Mark


    • Lifetime

SBFTF Series Resources

Press Releases
Case Studies

SBFTF Series Downloads

Note: Some Documentation may have Transition Networks named or pictured. Transition Networks was acquired by Lantronix in August 2021. Learn more about the acquisition here.

SBFTF Series Part Numbers

SBFTF1011-105 SBFTF Series

10/100Base-TX (RJ-45) [100 m/328 ft.] to 100Base-FX 1300nm multimode (ST) [2 km/1.2 mi.] Link Budget: 11.0 dB

SBFTF1013-105 SBFTF Series

10/100Base-TX (RJ-45) [100 m/328 ft.] to 100Base-FX 1300nm multimode (SC) [2 km/1.2 mi.] Link Budget: 11.0 dB

SBFTF1039-105 SBFTF Series

10/100Base-TX (RJ-45) 100 m/328 ft.] to 100Base-FX 1300nm multimode (LC) [2 km/1.2 mi.] Link Budget: 11.0 dB

SBFTF1014-105 SBFTF Series

10/100Base-TX (RJ-45) [100 m/328 ft.] to 100Base-FX 1310nm single mode (SC)[20 km/12.4 mi.] Link Budget: 16.0 dB

SBFTF1040-105 SBFTF Series

10/100Base-TX (RJ-45) [100 m/328 ft.] to 100Base-X SFP Slot (empty)

Lantronix Part # Name Description Order Now

Compatible Accessories

Lantronix Part # Legacy Part # Name Description Order Now
SFP Modules SFP Modules See Relevant SFP Modules
WMBD WMBD 5″ DIN Rail Mount Bracket
SPS-2460-SA SPS-2460-SA Stand-Alone Power Supply
E-MCR-05 E-MCR-05 12-Slot Media Converter Rack
RMS19-SA4-02 RMS19-SA4-02 4-Slot Media Converter Shelf
WMBV WMBV 5″ Vertical Mount
WMBL WMBL 4″ Wall Mount Kit (long)
WMBD-F WMBD-F 3.3” DIN Rail Mount Bracket (flat)
SPS-2460-PS SPS-2460-PS Piggy-Back Power Supply