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Individual Equipment Suppressors

These devices are intended for single phase 120 to 480 VAC or 5 to 240 VDC circuit applications at locations feeding sensitive/critical equipment. They are unique in that they are designed as a stand-alone surge suppression device and require no special enclosure when used outside an existing enclosure or cabinet. Their compact size make installation a breeze and the warranty is the best in the industry. Now add to all that, dedicated “all mode” protection, and you get a device that defines effective and reliable surge suppression.

Units are available with our Frequency Attenuation Network™ or simply the encapsulated Optimal Response Network.


SPT Series - Enhanced SineWave Tracking™ - AC units.

SPT-RJ Series - Enhanced SineWave Tracking™ - AC units with RJ14 protection included.

SPT-DIN Series - Enhanced SineWave Tracking™ - AC units with DIN rail mounting.

SPT-DC series - Enhanced SineWave Tracking™ - DC units.

SPW Series - Hardwired Enhanced SineWave Tracking™ - AC units from 120 to 480Vac

FSPT Series - Optimal Response Network - AC units.

ST-PIU2 / ST-SPIU2

ST-PIU6C / ST-SPIU6C

OEM/Residential

ST-LL240P- 240 Volt, 3 Wire, Parallel unit, With or W/O Frequency Attenuation.

Spanish Data Sheets

SPT Series

FSPT Series

ICPS Family

ST-ICPS - Enhanced Sinewave Tracking (when space is critical and limited.

ST-RSE-3N series These are Three (3) phase units in the same enclosure as the SPT units

ST-FDINxx-20 - 35 mm Din Rail enclosure unit. 120 or 240 single phase - thermal/current fused! Standard clamping performance

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