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DSL Surge Protector

Protect your DSL channel


13 In Stock
Same Day Shipping (before 5PM ET)
10 Year Double Diamond™ Warranty (Standard)

*Required field

Product Features

  • Provides 6-wire RJ-11, all-pin protection.
  • Defends against surges, power interference, ground loops, and discharges.
  • High-speed, high-energy handling capability.
  • Compact, for simple in-line installation.
  • Low shunt capacitance reduces signal loss.
  • Guaranteed for life!


The BLACK BOX® DSL Surge Protector guards your sensitive 6-wire RJ-11 DSL data lines against lightning-induced surges, AC power interference, electrostatic discharge (ESD), and ground loop energies.

State-of-the-art high-speed avalanche diode and thyristor technology is used with low-shunt capacitance circuitry. These enable the protector to function at a much greater bandwidth without causing signal degradation.

Installation is simple. Just insert the unit in series between the incoming data line and the I/O port of the device being protected. A self-resetting circuit means no maintenance is required.

Tech Specs

cUL 0
UL 0
CE Approval Yes
Clamping Voltage 240 V peak
Maximum Shunt Capacitance <95 pF
Peak Pulse Current 75 A
Response Time <5 ns

* 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 Diamond

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 DSL Surge Protector comes with a standard 10 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.