Product Overview

© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Dedicated - HVAC
www.littelfuse.com/
Rev: 1-A-062116
www.littelfuse.com/ct
Accessories
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.
Function Diagram
DELAY-ON-MAKE
DELAY-ON-BREAK
CT SERIES
Specifications
Time Delay
Type Microcontroller
Range 1 - 600s
Repeat Accuracy ±5%
Tolerance
(Factory Calibration) ±20%
Recycle Time ≤ 300ms
Input
Voltage 24VAC
Tolerance ±15%
AC Line Frequency 50/60 Hz
Output
Type Solid state
Form NO
Rating 0.75A steady state, 5A inrush at 55°C
Voltage Drop
≅ 1.25V
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 70°C / -40° to 85°C
Humidity 95% relative, non-condensing
Weight ≅ 2.4 oz (68 g)
Thermostat Anticipator Resistor: ≥ 3000 Ω
V = Voltage
FS = Fan Switch
FR = Fan Relay
T1 = Delay-on-Make
T2 = Delay-on-Break
R = Reset
= Undefined Time