PGA-1100 Series – Diode Logic Unit Series - Littelfuse PGA-1100 Diode Logic Unit Offers Reliable Arc-Flash Protection

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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-1100 series diode logic unit is an optional accessory for the Littelfuse arc-flash relays. It is used for tripping one circuit breaker with multiple arc-flash relays. Its purpose is to separate the trip paths so the breakers can be tripped independently from each other. Typical applications are switchboards with two incoming feeders and one tie-breaker or switchboards with several protected zones and tripping of a common upstream circuit breaker. The unit has three input diodes to handle the output of three arc-flash relays, and it also has three output diodes to handle the trip coils of three circuit breakers. If more than three relays/circuit breakers are needed, more units can be added by connecting terminal 8 of one box to terminal 4 of the next one, thus increasing the number of inputs and outputs with multiples of three. The PGA-1100 diode logic unit and arc-flash relays provide superior protection against the damaging effects of arc flashes and improve the lifespan of electrical equipment as well as the protection of personnel.


  • Separates trip path
  • Three input diodes

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PGA-11000.1 KgCheckOrder
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