SureStart® - single phase

Give large compressors and motors a soft start and extend their lifetime

Achieve over 60% reduction in startup current for your AC unit and pumps with our range of single phase Surestart solutions.

This will eliminate light flicker, reduce start-up noise, and extend the life of the motor or compressor. Single phase soft starters are suitable for 1.75 to 7 horse power (hp) motors in the 220/230V models and are suitable between 0.75 to 1.75 hp for the 115V models.

Plus, all single phase models work in both 60Hz and 50Hz applications.

See all Downloads at the bottom of the page.

Supply voltages

• 115 Volts

• 220-240 Volts


  • HVAC/R
  • Irrigation/submersible pumps
  • Compressors
  • Marine/RV
  • Solar power
  • RV/trucks
  • Military/government
  • Backup generators

Features and benefits

  • Automatic adjustment to cover the range of 1.75 to 7 hp
  • Fully self-contained in a conveniently small, double-insulated and flameretardant enclosure
  • SureStart® is out of the circuit after startup. It consumes less than 2W average in running mode
  • Reduce inrush current up to 70% at startup
  • Reduce light flicker by up to 10 times
  • Reduce startup noise and vibration
  • Avoid torque stress fracture on pipes
  • Automatic optimization of motor startup current
  • Reduce the voltage dip in the power line during startup
  • Reduce mechanical stress and prevent over-heating of compressor
  • Extend motor lifetime
  • Easy installation with supplied wiring

Motor Protection Functions

  • Protects the compressor/motor from stalling at low voltages
  • Delay function limits number of motor starts per hour
  • Provides motor reversal protection during short power outages
  • Internal delay timers prevents rapid cycling in fault conditions
  • Provides brownout protection
  • Self-testing diagnostics


  • SS0B12-20SN (115V, 60/50Hz, 12-20 FLA)

  • SS1B08-16SN (230V, 60/50Hz, 08-16 FLA)

  • SS1B16-32SN (230V, 60/50Hz, 16-32 FLA)

  • SS1B08-20PN (230V, 60/50Hz, 08-20 FLA)

  • SS0B08-20PN (115V, 60/50Hz, 08-20 FLA)