© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Delay-on-Make
www.littelfuse.com/
Rev: 1-A-062116
www.littelfuse.com/
TDU / TDUH / TDUL SERIES
www.littelfuse.com/tdu-tduh-tdul
Encapsulated Solid-State,
Delay-on-Make Timers
Wiring Diagram
Ordering Information
MODEL INPUT VOLTAGE TIME RANGE (SEC)
TDUL3000A 24 to 120VAC/DC 0.1-102.3
TDUL3001A 100 to 240VAC/DC 0.1-102.3
TDU3000A 24 to 120VAC/DC 1-1023
TDU3001A 100 to 240VAC/DC 1-1023
TDU3003A 120 to 277VC/DC 1-1023
TDUH3000A 24 to 120VAC/DC 10-10230
TDUH3001A 100 to 240VAC/DC 10-10230
If you don’t find the part you need, call us for a custom product 800-843-8848
Description
The TDU Series are encapsulated solid-state, delay-on-make
timers that combine digital timing circuitry with universal voltage
operation. The TDU offers DIP switch adjustment allowing
accurate selection of the time delay over the full time delay
range. This series is an excellent choice for process control
systems and OEM equipment.
Operation (Delay-on-Make)
Upon application of input voltage, the time delay begins. The
output is de-energized before and during the time delay. At
the end of the time delay, the output energizes and remains
energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and output.
Features & Benefits
FEATURES BENEFITS
Universal input voltage Meets wide application needs
Microcontroller based Repeat Accuracy +/- 0.5% or 20ms, whichever
is greater
Totally solid state
and encapsulated
No moving parts to arc and wear out over time, and
encapsulated to protect against shock, vibration,
and humidity
3 time ranges available
(0.1s to 2.8h) Makes it versatile for use in many applications
DIP switch adjustment Provides first time setting accuracy
Accessories
P1023-6 Mounting bracket
The 90° orientation of mounting slots makes
installation/removal of modules quick and easy.
P1015-64 (AWG 14/16)
Female Quick Connect
These 0.25 in. (6.35 mm) female terminals are
constructed with an insulator barrel to provide
strain relief.
P1015-18 Quick Connect to Screw Adapter
Screw adapter terminal designed for use with
all modules with 0.25 in. (6.35 mm) male quick
connect terminals.
C103PM (AL) DIN Rail
35 mm aluminum DIN rail available in a 36 in.
(91.4 cm) length.
P1023-20 DIN Rail Adapter
Allows module to be mounted on a 35 mm
DIN type rail with two #10 screws (DIN rail not
included).
L1 N/L2
Load may be connected to
terminal 3 or 1.
© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Delay-on-Make
www.littelfuse.com/
Rev: 1-A-062116
www.littelfuse.com/www.littelfuse.com/tdu-tduh-tdul
TDU / TDUH / TDUL SERIES
Specifications
Time Delay
Type Digital integrated circuitry
Range* 0.1 - 102.3s in 0.1s increments
1 - 1,023s in 1s increments
10 - 10,230s in 10s increments
Repeat Accuracy ±0.5% or 20ms, whichever is greater
Tolerance
(Factory Calibration) ±10%
Recycle Time ≤ 150ms
Time Delay vs Temp.
& Voltage ±5%
Input
Voltage 24 to 120VAC/DC; 100 to 240VAC/DC
AC Line Frequency 50/60 Hz
Tolerance ±20%
Output
Type Solid state
Form NO, open during timing
Maximum Load Current 1A steady state, 10A inrush at 60°C
Minimum Holding Current 40mA
Voltage Drop ≅ 2.5V @ 1A
Protection
Circuitry Encapsulated
Dielectric Breakdown ≥ 2000V RMS terminals to mounting surface
Insulation Resistance ≥100 MΩ
Mechanical
Mounting Surface mount with one #10 (M5 x 0.8) screw
Dimensions H 50.8 mm (2”); W 50.8 mm (2”);
D 30.7 mm (1.21”)
Termination 0.25 in. (6.35 mm)
male quick connect terminals
Environmental
Operating/Storage
Temperature -40° to 60°C / -40° to 85°C
Humidity 95% relative, non-condensing
Weight ≅ 2.4 oz (68 g)
Binary Switch Operation
*For CE approved applications, power must be removed from the unit when a switch position
is changed.
Function Diagram
DELAY- ON-MAKE (ON-DELAY) V = Voltage
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
= Undefined
Time
