Solid-State Dip-Switch Timers, THL Timers, Airotronics


Solid-State Dip-Switch Timers - THL Timers

Solid-State Dip-Switch Timers - THL Timers
THL Timers

THL timers are solid-state output units with digital timing. The TH comes in a 2" square case.

Ease of installation and hook-up is a primary design benefit. All models with integral time adjustment knob or factory-fixed time require only two connections. They may be wired in-line just like a single pole switch. Units with external time adjustment have two additional terminals for the resistor or potentiometer.


Timing Mode

Application of input voltage to the timer energizes the load and starts the time delay. At the end of the time delay, the load is de-energized. Removal and re-application of input voltage re-sets the timer.

  • Digital timing, solid-state output
  • 1 Amp current load handling
  • 10 Amps single-cycle surge handling
  • 4 Overlapping AC voltage ranges (from 19 to 277 volts)
  • 1% Repeat accuracy
  • Virtually unlimited time ranges
  • Factory-fixed or variable-timing adjustment
  • Totally encapsulated for protection from harsh environments
  • O-ring sealed exposed controls
  • Single screw mounting through center mounting hole
  • Standard 6.35mm (.250") quick connect blade terminals
  • 100% Operational testing before shipping

Repeat Accuracy: 0.1% under fixed conditions

Timing Ranges:

  • 0.1 sec. to 24 hours (1 sec., 10 sec.,
  • 100 sec., and 1000 secs. are standard.) Special time ranges available upon request

Reset/Recycle Time: 100 milliseconds


  • Fixed: 10% of nominal time (optional: 5%, 1%)
  • Variable: -0%, +15%
  • Limit: -10% at minimum time

Recycle Effect: None

Temperature Ranges:

  • Storage: -40 C to +85 C
  • Operating: -25 C to +85 C

Life Expectancy:

    No predictable failure if used within operating parameters


  • Transient Protection: 18 joules
  • Dielectric Strength: 1800V RMS 60 Hz

Power Requirement: .25 watts max.

Weight: 3 oz. (85g) maximum

Solid-State Output: SPST (N.O.)

Load Current: 1 amp continuous, 10 amps single-cycle surge

Time Cycle Interrupt: Resets timer to original state (Input Voltage Break)

Mode of Operation Series Input Voltage Time Ranges Time Adjustment Method
Interval On Delay THL


      40-140 VAC

      50/60 Hz


      90-260 VAC
      50/60 Hz


      19-48 VAC
      50/60 Hz


      90-277 VaC
      50/60 Hz

Variable Time Periods

0001 .1 to 1 sec.
0010 .1 to 10 sec.
0100 1 to 100 sec.
1000 10 to 1000 sec.

Any range up to 24 hours available on special order.

Fixed Time Periods

Specify in seconds (S) or hours (H)
  • 400S is 400 seconds
  • 05H5 is 5.5 hours
  1. Variable, integral, knob on timer.
  2. Variable external, remote potentiometer
  3. Fixed, internal, factory set.
  4. External remote resistor.

Site Design: Process Controls And Instrumentation