PGA-LS25 Series – Fiber-Optic Sensor Series - Littelfuse PGA-LS25 Fiber-Optic Sensors Offer Superior Arc-Flash Detection

Series: PGA-LS25 Series – Fiber-Optic Sensor
Availability: Obsolete


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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The PGA-LS25 series is an arc-detection, fiber-optic sensor that is designed to detect arcs along its entire length. This sensor is meant to be installed with the fiber along the back wall of switchboards to form the detection range across all compartments with just one sensor. The sensor is positioned to allow direct line of sight to all powered connections where an arc could develop. The sensor is capable of detecting the light from an arc flash from all angles. The detection radius is dependent on the arc power. If the trip level setting on the PGR-8800 arc-flash relay is set to 1, then the PGA-LS25 will react to all arcs greater than 3 kA within a 1 m radius (dependent on the width of the compartments and the length of fiber that is exposed to the light from an arc). This fiber-optic sensor and the arc-flash relay provide superior protection against the damaging effects of arc flashes and improve the lifespan of electrical equipment as well as the protection of personnel.


  • Direct line of sight
  • Fiber-optic material
  • Length: 5 m active, 8 m total

Access specifications, certifications, check availability and order parts below

Catalog #Supply
Relay Contacts ConfigWeight (lbs/g)Compare
Obsolete: 2016 -04-06
N/AN/AN/A1.5 Kg
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