Tel: 1-866-829-4253

DIGITAL TIMER with LED Display and high power Relay

Model series SDT-4PB
UP and DOWN timing modes
Seconds, Minutes, Hours or Days
Models for 120Vac, 208-250Vac, 
12V and 24V AC/DC
Output load : up to 30 Amp / 250Vac.
Optional Remote Control + Display Panel
Custom Timer ranges available

Digital Timer mounting in 1-gang box

I‚Äčnstallation example 
in 1-gang wiring box

SDT-4PB Digital Timer face plates

3 push-buttons:

Black, White or Custom
labels available

Metal Face
Dim's:  4.5" x 2.75" x 0.5"
115mm x 70mm x 12mm

Timer with Vandal Proof push buttons

SDM4 Digital Timer with Vandal Proof push buttons


Sauna Control Panel
Infra Red Sauna Control
Spa Controller
Fan Timer
Heater Timer
Steam Bath Control
Yoga Room Timer
Motor Timer
Light Timer
Chiller Timer
Timed Process Control
Pump Timer
Event Timer
Stove and Oven Timer
Timer with Alarm


  • Accurate time count
  • UP or DOWN count mode
  • Seconds, Minutes, Hours or Days
  • Interval, Cycling or time accumulating modes
  • Programmable preset with memory
  • Programmable timer limits
  • Large LED display
  • Large push-buttons
  • Quiet operation
  • Powerful internal relay
  • Simple wiring and installation
  • Supply and load can be different voltage
  • Semi Flush or Flush mounting


  • Remote control panel with display
  • Remote Start / Stop push-button
  • Automatic or manual start or restart
  • Special custom functionality
  • Low or High power internal relay
  • Custom face decals
  • Programmable operating features
  • Red, green or blue LED display
  • Additional input for external contact
  • Custom controls
  • Large Vandal-proof push-buttons
  • Custom designed features
  • Optional internal buzzer
Timer flush mount Timer Semi-Flush mount Timer Remote Start - Stop button
Model PPB-1
Remote START - STOP button
Flush face timer installation
in wall or panel
Semi-Flush face timer installation
in wall or panel

SDT-4PB Digital Timer wiring examples

Download more SDT-4 Wiring Examples

SDT-4PB Timer basic wiring for up to 30Amps SDT-4PB Timer simple wiring for up to 30 Amps

Basic SDT-4PB Timer wiring
for up to 30 Amps load
and with optional remote start - stop

Simple SDT-4PB Timer wiring
for loads up to 30 Amps

SDT-4PB Timer extended wiring for high power load with separate supply SDT-4PB Timer wiring with alarm buzzer

Extended SDT-4PB Timer wiring
for very high power loads using external contactor
and with separate supply for timer

SDT-4PB Timer wiring
with Alarm buzzer

SDT-4PB Timer wiring for up to 30 Amps with separate supply SDT-4PB low voltage wiring with remote start - stop

SDT-4PB Timer wiring
for  loads up to 30 Amps/250V
and with separate supply for timer

Special SDT-4PB Timer wiring
for loads up to 1 Amp
and with optional remote start - stop

TIMER Description

Download SDT-4 Timer Specifications

SDT-4PB is a digital timer designed to control external high or low power loads. Available timer ranges in Seconds, Minutes, Hours or Days.
It has an internal, accurate, programmable processor, that does not require any maintenance or adjustments.
The timer controls one on-board relay with contacts rated for up to 30Amp, 250Vac load max. Optionally an internal alarm buzzer or a low power relay can be ordered for special applications to control loads of up to 1Amp, 250Vac max. for instance to activate other external devices.
The high power or the optional low power relay contacts can be wired up to control Heaters, Coolers and other loads like a Fan, Motor, Pump, etc...
The relay contacts can be wired up as completely isolated from the controller's supply, so the supply voltage can be different than the voltages on the load.
In order to switch very high loads, the relay contacts can be wired up to control the coil of an external contactor.
An additional, dry contact input can be ordered for external Start/Stop control switch or other applications, like for instance a water level sensor, safety switch or external enable contact.
The timer is operated by pressing the corresponding keys on the control panel face. The preset values are stored in internal memory.
A variety of the controller's operating configurations, ranges and limits are also programmable via the face plate keys.
Models with customized face plates and special, vandal proof push-buttons are available.
The large 3-digit LED display shows the preset values, the current time count and other indications of operation. The LED display can be ordered in RED, GREEN or BLUE color.
Note, that SDT-4PB timers are designed to eliminate almost completely the EMF ( Electro Magnetic Field ) radiation.

THERMOSTAT and TIMER Numbering System

Thermostat and Timer Numbering System