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Elk 5-Stage In-Line Telephone Surge Protector


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Protect From Lightning, Voltage Spikes, Surge Through Phone

The ELK-952 provides exceptional protection against damage from lightning, voltage spikes, and surge damage coming into a phone line. It installs between the RJ31X Phone Jack and the Security Control. The ELK-952 features multi-stage protection and is 5 times faster than MOVs.

  • 5 Stage Surge Protection
  • Very Economical
  • Easy to Install
  • Works with Any Security Control
  • Super Fast Response Time: <1 Nanosecond

It is recommended that the customer install an AC surge arrester in the AC outlet to which this device is connected. This is to avoid damaging the equipment caused by local lightning strikes and other electrical surges.

Elk Premium Products For Security & Home Automation

What is a surge suppressor?

A surge suppressor (sometimes optimistically called a "surge protector") is a device inserted in the alternating current (AC) utility line and/or telephone line to prevent damage to electronic equipment from voltage "spikes" called transients. The power (or phone) line is effectively short-circuited to electrical ground for transient pulses exceeding the threshold. A more accurate term for this type of device is "transient suppressor." Transients, which arise from various causes (not just lightning), commonly reach peak levels of several hundred volts. The worst type of transient occurs when lightning strikes in the vicinity. Such a "spike" can peak at thousands of volts and cause permanent damage to equipment. Surge suppressors should be used as a matter of habit with all semiconductor-based electronic and computer hardware (like security controls).

When would you use one?

With every install of a control panel. The surge suppressor precedes the control, in the AC and/or phone line hookup, and deflects the surge or strike to ground (and away from the control).

NOTE: If a surge suppressor is not grounded, it is useless.

What makes Elk surge suppressors different?

They respond to power surges and transients in less than 1 nanosecond, automatically restoring after each surge within the specified ratings; while the standard unit on the market uses MOV technology, has a response time of less than 5 nanoseconds, and is not self restoring. Elk units are 5 times faster and carry a Lifetime Warranty, too.

What is the benefit?

The faster the surge is deflected to ground, the quicker it is sent AWAY from the control, improving the odds to save the control. The fact that it self restores, instead of "blowing" like the older MOV technology, means longer life.


  • Manufacturer Part #: ELK-952
  • Max. Signal Voltage: 250V (peak)
  • Breakdown Voltage: 280V (nominal)
  • Maximum "Peak" Pulse Current: 100Amps
  • Warranty: 2 Year