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Fiber Optic A/B Switch Latching with ST Single Mode connectors desktop

The switch operates using a unique all-optical micro-mirror, eliminating the complexity and vulnerabilities of electronic fiber switches.


Limited Quantity In Stock
Typically Ships within One Week
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • No optical-to-electrical conversion between fiber connections. Instead, the switch uses an internal mirror to optically move data between ports—technology that's trusted and time tested!


  • Switch latches mirror movement mechanically into a selected position and holds it there without the need for continuous electrical power.
  • Connect a single workstation to two or more networks or remote devices.
  • Simple to use. To route signals, just turn a knob on the front panel.
  • Ideal for government, healthcare, financial, or other applications where a private, data-sensitive network connects to a publicly accessible network.
  • For reliable switching in mission-critical environments, the micro-mirror is bonded to precise positioning servers.
  • Air-gap isolation provides a physical break in the circuit connection.
  • Operates transparently to signal rates, formats, and wavelengths, and doesn't require an upgrade when your data protocols change or speeds increase.
  • Work with 9-/125-micron single-mode fiber cable.
  • Universal 100–240-VAC power supply.
  • There's a reason why this type of manual switch continues to be the switch of choice for networking professionals everywhere: This tried-and-true optical switch performs as promised year after year.

    This type of switch is reliable because it uses a micro-mirror instead of electronics to route data signals from one fiber optic port to the next. And unlike conventional electronic switches, there are no complex and vulnerable electronic circuits to monitor and protect from intrusion, component failure, or interference. Plus the optical mirror movement on this latching switch maintains the selected position even when there's a power failure.

    Tech Specs

    CE Approval Yes
    Compatibility 9-/125-micron single-mode fiber
    Connectors (3) pairs of ST®; Power: (1) 3.5-mm input
    Crosstalk -45 dB (typical) per FOTP-42
    MTBF 100,000 hours or 1,000,000 cycles
    Optical Loss 0.5 dB (typical) at 1300 nm per FOTP-34 method B
    Power Input: 100-240 VAC, 50-60 Hz, autosensing; Output: 5 VDC
    Sensitivity 750 to 1440 nanometers
    Switching Speed Typical: 5 msec; Maximum: 10 msec

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.


    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $164.42

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $328.84


    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Fiber Optic A/B Switch Latching with ST SM connectors desktop comes with a standard 1 Year Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.