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Compact metal box with RJ45 and SFP ports, status LEDs, and DC power jack

PLANET

PLANET GST-805A 10/100/1000Base-T to 1000Base-SX/LX SFP transceiver

SKU CH-G5SB-YS9PK MPN GST-805A

Converts 10/100/1000Base-T copper to 1000Base-SX/LX fibre with SFP slot, auto MDI/MDI-X and DIP-switch smart management

  • Port count1 × 10/100/1000Base-T port 1 × 1000Base-SX/LX port
  • Product typeConverter
  • Media conversionRJ45 - SX/LX
  • Supported standardsIEEE 802.3, 10Base-T IEEE 802.3u, 100Base-TX IEEE 802.3ab, 1
  • Fiber mode50/125µm or 62.5/125µm multi-mode fiber cable, up to 220 / 5
  • Frame size9K
  • Extends network reach up to 120km over single-mode fiber
  • Handles 10/100/1000Base-T to 1000Base-SX/LX media conversion reliably
  • Auto MDI/MDI-X simplifies copper link setup without crossover cables
  • Operates from 0 to 50°C for industrial-grade temperature tolerance
  • Compact 1.02 x 3.19 x 3.70 inch design fits tight spaces

Media Converter for Gigabit Networks

The PLANET GST-805A converts signals between a 10/100/1000Base-T RJ-45 port and a 1000Base-SX/LX SFP slot. It supports IEEE 802.3, 802.3u, 802.3ab and 802.3z standards with auto MDI/MDI-X. A DC 5V 2A power adapter is included for standalone operation.

Suits Copper-to-Fiber Links, Not Direct SFP Use

This unit suits installers extending a copper link over multi-mode fibre up to 550 m or single-mode fibre up to 120 km using an SFP module. It does not suit buyers who need a bare SFP transceiver without a converter chassis, or those requiring 10 GbE speeds. Management features are configured via DIP switch only.

Plug-and-Play Install with Module Caution

Installation is plug-and-play: connect the RJ-45 cable, insert a compatible SFP module, attach fibre and apply power. The compact enclosure fits a chassis or desktop. The main issue is selecting an SFP module whose distance rating matches the fibre type and link length, otherwise the link will not come up.

How it compares

Measured against everything we stock in SFP & SFP+ Transceiver Modules, at today’s prices. Recalculated every night.

Price $62.99
Cheaper than about 68% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand namePLANET
Model nameGST-805A
Product typeConverter
Connectivity
Supported standardsIEEE 802.3, 10Base-T
IEEE 802.3u, 100Base-TX
IEEE 802.3ab, 1000Base-T
IEEE 802.3z, 1000Base-SX/LX
IEEE 802.3ah OAM
Fiber mode50/125µm or 62.5/125µm multi-mode fiber cable, up to 220 / 550m.
9/125µm single-mode cable, provides long distance for 10 / 20 / 30 / 40 / 50 / 70 / 120km (vary on fiber transceiver or SFP module)
Ports & slots
Port count1 × 10/100/1000Base-T port
1 × 1000Base-SX/LX port
Power
Power adapterDC 5 V / 2A
Size & build
Frame size9K
Product dimensions1.02 in × 3.19 in × 3.7 in
Product weight0.44 lb (0.2 kg)
Shipping weight0.91 kg
Package size170 × 157 × 103 mm
Environment & compliance
Temperature rangeOperating: 0–50 degree Celsius
Storage: -40–70 degree Celsius
Humidity range5–90% non-condensing
More details
Media conversionRJ45 - SX/LX
Indicator lightsPWR (Green)
TP: 1000, LINK/ACT
Fiber: LINK/ACT

Questions about this item

What SFP transceiver module do I need to connect the GST-805A to single-mode fiber at 20 km?

Choose an SFP module rated for 1000Base-LX on 9/125 µm single-mode fiber with a 20 km reach. The GST-805A accepts any standard SFP, so match the module to your distance and wavelength.

Will the RJ-45 port auto-negotiate with a legacy 100Base-TX switch?

Yes. The TP port supports IEEE 802.3u 100Base-TX and IEEE 802.3ab 1000Base-T with auto-negotiation and auto MDI/MDI-X, so it will link at 100 Mbps or 1 Gbps automatically.

Which front-panel LEDs confirm a healthy fiber link after I install the module?

The green PWR LED shows power. The Fiber LINK/ACT LED lights solid when the SFP module detects a valid 1000Base-SX/LX link and blinks during traffic.

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