ProAlarm II is a failure indication device that informs a user of the need to replace a failed surge protective device (SPD). It can be quickly and easily installed next to the SPD on the same rail, by making a connection between the RC contacts of the SPD and the alarm unit. If an SPD fails, the user is informed by a loud audible beeping sound and the illumination of a red LED. The alarm can be silenced with the press of a button, leaving the LED illuminated until the SPD has been replaced.


  • Audio alarm SPD failure indication
  • Red LED visual SPD failure indication
  • Button for acknowledging and silencing the alarm
  • Connect multiple SPDs to one ProAlarm II
  • Rated voltage AC: 110 V-230 V