Time Delay Relays
Dedicated - Delay-on-Make
TH1 SERIES
Description
The TH1 Series is a solid-state relay and timer combined into
one compact, easy-to-use control. This highly reliable device
eliminates the need for a separate solid-state relay. When
mounted to a metal surface, it can switch load currents up to
20A steady state, and 200A inrush.
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
Repeat Accuracy + / - 2%,
Factory calibration + / - 5%
Allows flexiblility for OEM applications and reduces
labor and component costs
Allows direct operation of motors, lamps, and
heaters directly without a contactor
No moving parts to arc and wear out over time and
encapsulated to protect against shock, vibration,
and humidity
Facilitates heat transfer for high current applications
Wiring Diagram
L1
N/L2
Microcontroller based
Compact, low
cost design
High load currents up
to 20A, 200A inrush
V = Voltage
S1 = Optional Low Current
Initiate Switch
L = Load
R
T
is used when external
adjustment is ordered.
Totally solid state
and encapsulated
Metalized
mounting surface
Accessories
P1004-95, P1004-95-X Versa-Pot
Panel mountable, industrial potentiometer
recommended for remote time delay adjustment.
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
P1015-13
(AWG 10/12),
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.
Ordering Information
MODEL
OUTPUT
RATING
INPUT
VOLTAGE
ADJUSTMENT
TIME DELAY
TH1B633
TH1C415
TH1C621
10A
20A
20A
230VAC
120VAC
230VAC
Onboard
Fixed
External
2 - 180s
5s
0.1 - 3s
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.
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/th1
Rev: 1-A-062216
Time Delay Relays
Dedicated - Delay-on-Make
TH1 SERIES
Specifications
Time Delay
Range
Repeat Accuracy
Tolerance
(Factory Calibration)
Time Delay vs Temp.
& Voltage
Recycle Time
Input
Voltage
Tolerance
AC Line Frequency
Power Consumption
Output
Type
Form
Maximum Load Currents
0.1 - 600s in 4 adjustable ranges or fixed
±2% or 20ms, whichever is greater
≤ ± 5%
≤ ±10%
≤ 150ms
24, 120, or 230VAC
±15%
50/60 Hz
≤ 2VA
Solid state
NO, open during timing
Output
Steady State
A
6A
B
10A
C
20A
100mA
≅
2.5V at rated current
≅
5mA @ 230VAC
Selection Guide
Inrush**
60A
100A
200A
Function Diagram
DELAY-ON-MAKE (ON-DELAY)
Minimum Load Current
Voltage Drop
OFF State Leakage Current
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
Mechanical
Mounting **
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
Encapsulated
≥ 2000V RMS terminals to mounting surface
≥ 100 MΩ
Surface mount with one #10 (M5 x 0.8) screw
H
50.8 mm (2.0”);
W
50.8 mm (2.0”);
D
38.4 mm (1.51”)
0.25 in. (6.35 mm) male quick connect terminals
V = Voltage
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
= Undefined
Time
-20° to 60°C / -40° to 85°C
95% relative, non-condensing
≅
3.9 oz (111 g)
**Must be bolted to a metal surface using the included heat sink compound. The maximum
mounting surface temperature is 90°C. Inrush: Non-repetitive for 16ms.
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/th1
Rev: 1-A-062216
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