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Small rectangular SFP transceiver module with metal housing and ST connector port

Perle

Perle C-100MM-S1ST20U SFP transceiver 100Base-BX 100Base-FX

SKU CH-QJBF-BF6ES

A 100Base-BX and 100Base-FX SFP transceiver for single-mode fibre links

  • HighlightsNetwork Technology:100Base-BX Network Technology:100Base-FX
  • 100Base-BX and 100Base-FX dual-mode support simplifies fibre links
  • 100 Mbps full-duplex throughput handles legacy Fast Ethernet traffic
  • SFP form factor fits standard switch and router slots
  • New condition guarantees factory-original performance and reliability
  • Perle engineering ensures interoperability with multi-vendor networks

100Base-BX and 100Base-FX transceiver

The Perle C-100MM-S1ST20U is a network transceiver supporting 100Base-BX and 100Base-FX standards. It provides fibre connectivity for 100 Mbps Ethernet links in enterprise and campus networks. Network engineers use it to extend copper segments over single-mode or multi-mode fibre. The module fits standard SFP slots in switches and routers.

Sustained-load behaviour

The transceiver maintains a steady 100 Mbps data rate during continuous operation without burst-rate degradation. It handles constant traffic streams across 100Base-BX or 100Base-FX links with consistent signal quality. Heat dissipation remains stable under full duplex load, keeping the optical budget within specification. No performance drop-off occurs over extended transmission periods.

Installation notes

Insert the module into any compatible SFP port until the latch clicks, then connect the appropriate fibre patch cord. The bail-clasp mechanism secures the transceiver without tools. A common issue is mismatched wavelength pairs on 100Base-BX links, which prevents the link from coming up. Verify TX and RX wavelengths match the remote end before troubleshooting further.

How it compares

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

Price $458.99
Pricier than about 82% of the 1,471 comparable items (median $138.99).

Specifications

Product
Brand namePerle
Model nameC-100MM-S1ST20U

Questions about this item

How much power does the Perle C-100MM-S1ST20U draw when running continuously?

The transceiver operates on 100Base-BX and 100Base-FX network technology with a 20 km reach, typical for low-power single-fibre links.

What connector or patch cord must I already have to plug this module in?

This model uses a single-strand fibre interface for 100Base-BX, so you need a matching BX patch cord with the correct TX and RX wavelengths.

Will the C-100MM-S1ST20U link with my older 100Base-FX multimode gear?

Yes, the module supports 100Base-FX alongside 100Base-BX, allowing it to connect to legacy Fast Ethernet fibre equipment.

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