Features
• Recognized as “Transient Voltage Surge Suppressors”, UL File
#E75961 to Standard 1449
• Recognized as “Across-The-Line Components”, UL File #E56529 to
Standard 1414
• Recognized as “Protectors for Data Communication and Fire Alarm
Circuits”, UL File #E135010 to Standard 497B
• Recognized as “Transient Voltage Surge Suppressors”, CSA File
#LR91788 to Standard C22.2 No. 1 - M1981
• High Energy Absorption Capability WTM . . . . . . . . . . . . . . Up to 360J
• Wide Operating Voltage Range VM(AC)RMS . . . . . . . . . . . 130V to 750V
• Line-Voltage Operation - Can be Operated Directly Across 120V,
240V, etc., AC Power Lines
• Available in Tape and Reel for Automatic Insertion Equipment

Description
LA series transient surge suppressors are radial-lead varistors that can be operated continuously across AC power
lines. These UL recognized varistors “across-the-line” components, because of their radial lead construction, require
very little mounting space. This feature is particularly important in compact, hard wired system designs.
LA series varistors are available in four model sizes: 7mm,
10mm, 14mm and 20mm; and have a VM(AC)RMS voltage
range from 130V to 1000V, and an energy absorption
capability up to 360J. Some LA series model numbers are
available with two clamping voltage selections, designated
by a model number prefix of either A or B. The “A” selection
is the standard model; the “B” selection provides a tighter
clamping voltage.