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Compact Perle SFP transceiver module with metal housing and optical port

Perle

Perle SMI-100-S1ST20U 10/100Base-T 100Base-BX-U SFP transceiver

SKU CH-2FHF-A75CP

Converts 10/100Base-T copper links to 100Base-BX-U single-strand fibre up to 20 km and includes a 100-240 V AC power adapter

  • FeatureNetwork Technology:10/100Base-T Network Technology:100Base-B
  • Package ContentsSMI-100-S1ST20U Transceiver/Media Converter 100-240v AC, Reg
  • 10/100Base-T and 100Base-BX-U support for flexible network connectivity
  • Single-fiber SFP transceiver extends links up to 20 km
  • 100-240 V AC power adapter enables global deployment
  • New condition guarantees reliable out-of-the-box operation
  • First listed by manufacturer in 2025 for current availability

Perle 10/100Base-T SFP Transceiver

The Perle SMI-100-S1ST20U is a bidirectional SFP transceiver designed for single-fibre networks operating at 100 Mbps. It connects copper Ethernet equipment to a 100Base-BX-U optical link using a single strand of fibre. The module includes a regulated DC power adapter accepting 100 to 240v AC input. It suits network engineers extending LAN segments over long distances without running additional fibre pairs.

Sustained Link Performance

The transceiver maintains a stable 100 Mbps full-duplex connection across the single-fibre BX-U wavelength pair. Because it operates at Fast Ethernet speeds, the optical budget supports links up to 20 km without signal regeneration. The external power adapter isolates the module from switch power fluctuations, ensuring consistent uptime during continuous data transfers. Thermal output remains low enough for dense chassis installations without active cooling.

Upgrade Path and Fit

This module replaces a pair of standard dual-fibre 100Base-FX transceivers when fibre strand count is limited. It upgrades existing copper-only switch ports to single-strand fibre without replacing the switch. The jump is worth it when available fibre cores are exhausted or when extending a 10/100 network beyond copper distance limits. It is not for networks requiring gigabit or multi-gigabit throughput.

Highlights

  • 10/100Base-T and 100Base-BX-U support for flexible network connectivity
  • Single-fiber SFP transceiver extends links up to 20 km
  • 100-240 V AC power adapter enables global deployment
  • New condition guarantees reliable out-of-the-box operation
  • First listed by manufacturer in 2025 for current availability

Specifications

BrandPerle
ModelSMI-100-S1ST20U
FeatureNetwork Technology:10/100Base-T
Network Technology:100Base-BX-U
Package ContentsSMI-100-S1ST20U Transceiver/Media Converter
100-240v AC, Regulated DC Adapter

Questions about this item

How much heat does the SMI-100-S1ST20U generate when running continuously?

The transceiver operates with a 100-240v AC regulated DC adapter, so power draw and heat output are kept low for all-day use.

What must I already own for the SMI-100-S1ST20U to work?

You need a device with an available SFP slot that accepts 100Base-BX-U optics and a single-strand fibre patch lead with an SC connector.

Will the SMI-100-S1ST20U link with my existing 10/100Base-T copper switches?

Yes, the copper side negotiates 10/100Base-T so it connects directly to older Fast Ethernet ports without configuration changes.

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