Delta LA301 AC Lightning Arrestor, Single Phase (2-Wire)

Delta LA301 AC Lightning Arrestor, Single Phase (2-Wire)
Delta LA301 AC Lightning Arrestor, Single Phase (2-Wire)

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Item code Brand name Model number
DELLA-301 Delta Lightning Arrestors LA301

Untitled Document
altE Delta Lightning LA301

AC Lightning Arrestor
2 Wire, Single Phase
LA 301

Rapid response, high current Delta Lightning Arrestors help prevent damage to computers and other electronic equipment. The Delta LA Series handles the big surges, like lightning up to 50,000 amps, passing them harmlessly to the ground.

While it is not possible to achieve 100% protection, Delta units will greatly reduce problems due to lightning, power surges and voltage spikes. The LA301 model for 120-250VAC, single phase systems (two wire service) can be used for applications where one hot wire of a single phase system is to be protected.


  • employ a non-conductive base to prevent a blown arrestor from creating a shock hazard
  • do not cover adjacent equipment with carbon dust on failing, preventing damage to other equipment
  • always fail "clear" to permit continued use of the power system
  • are based on a silicon material to provide quicker operation at lower conduction resistance
  • will pass a large number of high-energy surges and half-cycle spikes prior to failing
  • feature extra long leads to ease installation
  • have locknut and bushing furnished
  • are available in a variety of voltages or number of poles

LA 301 Specifications

Rated Voltage Design Type Surge Current Max. Energy Leads Enclosure Rating Dimensions
Single Phase
2-Wire Service
Silicon Oxide Varistor™ 100,000 amps 3,000 Joules
per pole
36" #12 THHN NEMA 4 4.5" Height, 2.25" Diameter

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