Time Delay Relays
Delay-on-Make
TDU / TDUH / TDUL SERIES
Encapsulated Solid-State,
Delay-on-Make Timers
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.
Wiring Diagram
L1
N/L2
Features & Benefits
FEATURES
Universal input voltage
Microcontroller based
Totally solid state
and encapsulated
Load may be connected to
terminal 3 or 1.
BENEFITS
Meets wide application needs
Repeat Accuracy +/- 0.5% or 20ms, whichever
is greater
No moving parts to arc and wear out over time, and
encapsulated to protect against shock, vibration,
and humidity
Makes it versatile for use in many applications
Provides first time setting accuracy
3 time ranges available
(0.1s to 2.8h)
DIP switch adjustment
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.
TIME RANGE (SEC)
Ordering Information
MODEL
INPUT VOLTAGE
TDUL3000A
TDUL3001A
TDU3000A
TDU3001A
TDU3003A
TDUH3000A
TDUH3001A
24 to 120VAC/DC
100 to 240VAC/DC
24 to 120VAC/DC
100 to 240VAC/DC
120 to 277VC/DC
24 to 120VAC/DC
100 to 240VAC/DC
0.1-102.3
0.1-102.3
1-1023
1-1023
1-1023
10-10230
10-10230
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).
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tdu-tduh-tdul
www.littelfuse.com/
Rev: 1-A-062116
Time Delay Relays
Delay-on-Make
TDU / TDUH / TDUL SERIES
Specifications
Time Delay
Type
Range*
Repeat Accuracy
Tolerance
(Factory Calibration)
Recycle Time
Time Delay vs Temp.
& Voltage
Input
Voltage
AC Line Frequency
Tolerance
Output
Type
Form
Maximum Load Current
Minimum Holding Current
Voltage Drop
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
Digital integrated circuitry
0.1 - 102.3s in 0.1s increments
1 - 1,023s in 1s increments
10 - 10,230s in 10s increments
±0.5% or 20ms, whichever is greater
±10%
≤ 150ms
±5%
24 to 120VAC/DC; 100 to 240VAC/DC
50/60 Hz
±20%
Solid state
NO, open during timing
1A steady state, 10A inrush at 60°C
40mA
≅
2.5V @ 1A
Encapsulated
≥ 2000V RMS terminals to mounting surface
≥100 MΩ
Surface mount with one #10 (M5 x 0.8) screw
H
50.8 mm (2”);
W
50.8 mm (2”);
D
30.7 mm (1.21”)
0.25 in. (6.35 mm)
male quick connect terminals
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
-40° to 60°C / -40° to 85°C
95% relative, non-condensing
≅
2.4 oz (68 g)
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tdu-tduh-tdul
www.littelfuse.com/
Rev: 1-A-062116
Embedded System
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