PGA-LS30 Series – Fiber-Optic Sensor Series - Littelfuse PGA-LS30 Fiber-Optic Sensors Offer Superior Arc-Flash Detection

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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-LS30 series fiber-optic sensor is an arc-detection sensor that uses fiber to detect arcs anywhere along its length. This sensor is meant to be installed with the fiber along the back wall of switchboards to form the detection range across many 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. The sensor is calibrated at the factory for 60 cm (24 in) of fiber in each monitored compartment. When using a fiber-optic sensor in compartments with less than 60 cm (24 in) of fiber, the sensitivity may have to be adjusted so that the sensor will detect arcs of 3 kA or more. 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. This sensor is intended to be installed as part of an active arc-flash mitigation system that uses Littelfuse arc-flash relays.


  • Transmitter and receiver design with copper wiring to relay
  • Rugged and flexible 5 cm bending radius
  • Length: 18 m active, 20 m total

Access specifications, certifications, check availability and order parts below

Catalog #Weight (lbs/g)StockSamples
PGA-LS301.5 KgCheckOrder
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