Intermatic extends the auto-voltage concept to a universal, electronic time switch that offers the same wire and go capabilities but in an electronic, to the minute accurate, time switch.  This is a 40 amp rate clock with 20 ON/OFF programs that can be programmed in any configuration of 24 hour or 7 day.  The GM40AVE offers precision control with automatic DST and a lithium battery for back up.  Included is a manual override to supersede programming until the next programmed event.

Grässlin's GM40 Auto-Voltage Series 40 Amp Electronic Time Switch is a universal electronic control, which automatically detects the input voltage without the use of a DIP switch or selector pins. The time switch automatically selects any voltage between 120 VAC and 277 VAC. This time switch controls high amperage loads for lighting, HVACR, pumps, motors, fan controls, access controls, agricultural facilities, and general purpose electrical circuits. The mechanism is mounted in a compact UL Type 3R outdoor enclosure and features a DPDT Switching Configuration standard.

  • Series Overview
  • Model Lineup
  • Specifications
  • Resources

  • 40 Amp rating
  • Power and status LED indicators
  • 24-Hour or 7-Day applications
  • 3 preset adjustable block programs
  • Auto-Voltage selection 120 VAC through 277 VAC
  • DPDT Switching Configuration standard ( 2 N.O. and 2 N.C. Contacts)
  • 20 setpoint programs
  • Easy-to-follow menu driven programming
  • Temporary manual override with load status indication
  • Battery backup


  • Lighting Control
  • HVAC/R
  • Pumps/ Motors/ Fan Controls
  • Access Control
  • Agricultural Facilities
  • General Purpose Electrical Circuits


Product Ratings
CA Title 20 Listed
ModelDescriptionSwitch TypeAmpsTiming Interval
GM40AVE120-277DPDT40/301 Minute

Enclosure:                         8.8" H X 6.61" W X 3" D

Supply Voltage:                120-208/240 or 277 VAC

N.O. Contacts:                   40A, Resistive 120-277 VAC

                                           1HP (16FLA, 90LRA), 120 VAC

                                           2HP (12FLA, 52LRA), 208-277 VAC

                                           30A, Ballast, 120 VAC

                                           20A, Ballast 277 VAC

                                           15A, Tungsten, 120 VAC

N.C. Contacts:                    30 Amp Resistive, 120-277 VAC

                                            1 HP (12FLA, 30LRA), 120 VAC

                                            2 HP (10FLA, 30LRA), 240 VAC

                                            2A, Tungsten, 120 VAC

                                            10A, Ballast, 277 VAC

Wiring Connections:          Screw box lug terminals

Operating Temperature:   -40º F to 131º F (-40ºC to 55ºC)

Operating Humidity:          0 to 95% RH, non-condensing

Electrical Life:                    50,000 Operations at Full Load

Switch Configuration:       DPDT (2 N.O. and 2 N.C. Contacts)

Shipping Weight:               3lbs.

Warranty:                           Limited One Year




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