Time Delay Relays
Dedicated - HVAC
TAC1 SERIES
Delay-on-Make
Description
The TAC1 Series was designed to delay the operation of a
compressor relay. It eliminates the possibility of relay chatter
due to half-wave failure of the output. It connects in series with
the load relay coil and provides a delay-on-make time delay
each time input voltage is applied. It can be used for random
start, anti-short cycling, sequencing, and many other
applications. It is an excellent choice for all air conditioning and
refrigeration 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
Wiring Diagram
L1
N/L2
FEATURES
Analog circuitry
0.5A steady state,
10A inrush
V = Voltage
L = Load
Load may be connected
to terminals 3 or 1.
R
T
is used when external
adjustment is ordered.
BENEFITS
Repeat accuracy + / - 2%,
Factory calibration + / - 20%
Provides 100 million operations in typical conditions.
Fail-safe design eliminates contactor chatter
Connects in series with
load relay coil
Meets UL 873
Fully encapsulated
UL Recognized for air conditioning and
refrigeration equipment
Protects against shock, vibration and humidity
Accessories
P1004-XX, P1004-XX-X Versa-Pot
Panel mountable, industrial potentiometer
recommended for remote time delay adjustment.
P1023-6 Mounting bracket
The 90° orientation of mounting slots makes
installation/removal of modules quick and easy.
Ordering Information
MODEL
INPUT VOLTAGE
ADJUSTMENT
TIME DELAY
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
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.
TAC1223
TAC1411
TAC1412
TAC1413
TAC14164
24VAC
120VAC
External
Fixed
Fixed
Fixed
Fixed
2 - 180s
1s
2s
3s
64s
120VAC
120VAC
120VAC
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/tac1
Rev: 1-A-062316
Time Delay Relays
Dedicated - HVAC
TAC1 SERIES
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.
VTP(X)(X) Plug-on Adjustment Module
Mounts on modules with in-line adjustment
terminals. Rated at 0.25W at 55°C. Available in
resistance values from 5KΩ to 5MΩ.
Selection Table for VTP Plug-on Adjustment Accessory
Time Delay
1
- 0.05-3s
2
- 0.5-60s
3
- 2-180s
4
- 5-600s
VTP P/N
VTP4B
VTP4F
VTP4J
VTP5N
Specifications
Time Delay
Type
Range
Repeat Accuracy
Tolerance
(Factory Calibration)
Recycle Time
Time Delay vs Temp.
& Voltage
Input
Voltage
Tolerance
AC Line Frequency
Output
Type
Form
Rating
Voltage Drop
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
Analog circuitry
0.05 - 600s in 4 adjustable ranges or fixed
±2%
±20%
≤ 20ms after timing, during timing - 0.1%
of time delay or 75ms, whichever is greater
≤ ±10%
24, 120, or 230VAC
±20%
50/60 Hz
Solid state
NO, open during timing
0.5A steady state, 10A inrush at 60°C
120 & 230VAC:
≅
4.2V @ 0.5A
24VAC:
≅
2.5V @ 0.5A
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
Selection Guide
-40° to 80°C / -40° to 85°C
95% relative, non-condensing
≅
2.4 oz (68 g)
Function Diagram
DELAY-ON-MAKE (ON-DELAY)
V = Voltage
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
= Undefined
Time
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tac1
Rev: 1-A-062316
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