E-100BTX-HT Series

Unmanaged Hardened Fast Ethernet Media Converter
(1) 100Base-TX Port + (1) 100Base-FX Port

E-100BTX-HT Series
  • LTX-E-100BTX-FX-05-HT-Series
  • LTX-E-100BTX-FX-05-HT
  • LTX-E-100BTX-FX-05-SCHT

The E-100BTX-HT Series is a Hardened Ethernet stand-alone media converter that provides an interface between 100Base-TX ports and 100Base-FX ports, allowing users to integrate fiber optic cabling into extreme 100Base-TX copper environments, by supporting an operating temperature range of -25°C to 65°C. Operating at Layer 1, the physical layer, data is passed through the converter at line speed, making it ideal for applications where low latency is essential.

E-100BTX-HT Series

E-100BTX-HT Series Overview


  • Extended Temperature Capable: Designed to operate in environments where ambient temperatures can rise as high as 65°C (149°F)
  • Auto-Negotiation
  • Auto-MDI/MDIX
  • Link Pass Through
  • Far-End-Fault Detection
  • Automatic Link Restoration
  • Pause

E-100BTX-HT Series Tech Specs


    • IEEE 802.3

    Data Rate

    • 100 Mbps


    • SW1: Auto-Negotiation On/Off
    • SW2: Pause TX On/Off
    • SW3: LPT On/Off
    • SW4: FEF On/Off


    • Jumper Block 1: Auto-MDI/MDIX enable

    Status LEDs

    • PWR (Power): Lit for normal operation
    • SDF (Signal Detect Fiber): Lit for fiber link
    • SDC (Signal Detect Copper): Lit for copper link
    • RXF (Receive Fiber): Flashing = RX data
    • RXC (Receive Copper): Flashing = RX data


    • Width: 3″ [76 mm]
    • Depth: 4.7” [119 mm]
    • Height: 1″ [25 mm]

    Power Supply

    • External AC/DC required; Output: 9 VDC. 1.0A;
    • 120-240VAC input, unregulated; standard


    • Operating: -25°C to 65°C
    • Humidity: 5% to 95% (non-condensing)
    • Altitude: 0 – 10,000 ft.


    • 2 lbs. [0.90 kg]


    • Greater than 46,768 hours (MIL-HDBK-217F)
    • Greater than 123,861 hours (Bellcore7 V5.0)


    • Safety: Wall Mount Power Supply: UL Listed, cUL Listed (Canada)
    • FCC Class A, CISPR22/EN55022 Class A, EN55024, EN61000, CE Mark


    • Lifetime

E-100BTX-HT Series Resources

Application Spotlights
Press Releases
Case Studies

E-100BTX-HT 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.


E-100BTX-HT Series Part Numbers

E-100BTX-FX-05(HT) E-100BTX-HT Series

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

E-100BTX-FX-05(SCHT) E-100BTX-HT Series

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

E-100BTX-FX-05(SMHT) E-100BTX-HT Series

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

Lantronix Part # Name Description Order Now

Compatible Accessories

Lantronix Part # Legacy Part # Name Description Order Now
WMBD-FS WMBD-FS 3.1” DIN Rail Mount Bracket (flat, small)
WMBD WMBD 5″ DIN Rail Mount Bracket
SPS-2460-SA SPS-2460-SA Stand-Alone Power Supply
RMS19-SA4-02 RMS19-SA4-02 4-Slot Media Converter Shelf
WMBV WMBV 5″ Vertical Mount
WMBL WMBL 4″ Wall Mount Kit (long)