TH4 Series (F31 Dual 48V AC_DC)


Lead Time: 10 Days

$117.88 (USD) / EACH

Description Of Function

Upon application of input voltage, the time delay (t1) begins. At the end of the time delay (t1), the output is energized and remains in that condition for the time delay (t2). At the end of this time delay, the output is de-energized and the sequence repeats until input voltage is removed.

Function Chart

Product Overview

  • Microprocessor-based for superior accuracy and repeatability
  • 30 Amp heavy-duty switching
  • Controls heavy loads without a separate contactor
  • Horsepower ratings up to 2HP @ 240V AC
  • Control voltages of 240V AC/DC, 120V AC/DC, 48V AC/DC, 12V DC and 24V AC/DC
  • Adjustable on-board potentiometers, remote potentiometers, or factory-set fixed time delays
  • High-contrast markings make connection and operation simple.
  • Quick-connect terminals for easy wiring
Enclosure Style

Encapsulated 2” x 3” enclosure with single screw mounting

Configuration / Contact Rating
Ratings SPDT (NO Contact) SPDT (NC Contact)
AC 240VAC G.P. 30A 15A
DC 28VDC RES. 20A 10A
Motor Load 115/120/125 1 HP 1/4 HP
Motor Load 230/240/250 2 HP 1/2 HP


Application Information
  • Voltage Tolerance: AC Operation: +10/-15% of nominal at 50/60 Hz; DC Operation: +10/-15% of nominal
  • Load (Burden): Maximum of 3 VA for all voltages
  • Setting Accuracy: Maximum Setting (Adjustable): +5%, -0%; Minimum Setting (Adjustable): +0%, -50%; Fixed Time Delay: +2% or 50ms, whichever is greater
  • Repeat Accuracy: Constant voltage and temperature: +0.1% or + 0.04 seconds, whichever is greater; Changing voltage and temperature within limits: +5% or + 0.1 seconds, whichever is greater.
  • Reset Time: Triggered with Input Voltage: 100ms; Triggered with Control Switch: 40ms
  • Start-up Time: Time from when power is applied until unit is timing: 0.05 seconds
  • Maintain Function Time: Time unit continues to operate after power is removed:  0.01 Seconds. Interruptions longer than this time may reset the timing cycle; Units Triggered by a Control Switch: Minimum required trigger switch closure time is 50ms.
  • Temperature: Operating: -28o to 65o C (-18o to 149o F); Storage: -40o to 85o C (-40o to 185o F)
  • Life: Mechanical: 10,000,000 operations; Full Load: 100,000 operations
UL #: 109466


Time-based control with high amperage switching allows effective and economical operation of heavy loads such as pumps, compressors, and heaters. This cost-effective solution can eliminate the need for a separate contactor reducing cost and saving space. Choose from adjustable on-board potentiometers, remote potentiometers, or factory-set fixed time delays.

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  • Output: 10A SPDT
  • Trip Delay: 0.5-50 seconds
  • Enclosure Style: Encapsulated
  • Current Range: 5 - 50A
  • Sensing Delay On Power: 5 seconds
  • Communication Platform: None
  • Monitored Voltage: 102-138V AC
  • Output: 10A SPDT
  • Protection: Phase Loss, Phase Reversal, Voltage Unbalance, Undervoltage & Overvoltage
  • Standard Modifications: None
  • Enclosure Style: Plug-in
  • Control Voltage: 120V AC
  • Output: 4 Form C Contacts
  • Options: Standard (LED and Push-to-Test Included)
  • Terminal Configuration: Blade