© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Single Shot

Rev: 1-A-062216

www.littelfuse.com/thds

THDS SERIES

Wiring Diagram

Description

The THDS Series combines accurate timing circuitry with high

power solid-state switching. It can switch motors, lamps, and

heaters directly without a contactor. You can reduce labor,

component cost, and increase reliability with these small,

easy-to-use, timers.

Operation (Single Shot)

Input voltage must be applied before and during timing. Upon

momentary or maintained closure of the initiate switch, the

output energizes for a measured interval of time. At the end

of the delay, the output de-energizes. Opening or reclosing the

initiate switch during timing has no affect on the time delay.

The output energizes if the initiate switch is closed when input

voltage is applied.

Reset: Reset occurs when the time delay is complete and the

initiate switch is opened. Loss of input voltage resets the time

delay and output.

Features & Benefits

FEATURES

BENEFITS

Microcontroller based

Repeat Accuracy + / - 0.5%,

Factory calibration +/- 1%

High load currents up

to 20A, 200A inrush

Allows direct operation of motors, lamps and

heaters without a contactor

Totally solid state

and encapsulated

No moving parts to arc and wear out over time and

encapsulated to protect against shock, vibration,

and humidity

Metalized

mounting surface

Facilitates heat transfer in high current applications

Compact, low

cost design

Allows flexibility for OEM applications and reduces

labor and component costs

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.

P1015-64 (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.

L1

N/L2

V = Voltage

UTL = Optional Untimed

Load

L =Timed Load

S1 = Initiate Switch

RT is used when external

adjustment is ordered.

Ordering Information

MODEL

INPUT

VOLTAGE

ADJUSTMENT

TIME DELAY

OUTPUT

RATING

THDS410.25SA 120VAC

Fixed

0.25s

6A

THDS431C

120VAC

Onboard

1 - 100s

20A

THDS610.25SA 230VAC

Fixed

0.25s

6A

If you don’t find the part you need, call us for a custom product 800-843-8848