© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Delay-on-Break

Rev: 1-A-062216

www.littelfuse.com/tsdb

TSDB SERIES

Description

The TSDB Series is designed for more demanding commercial

and industrial applications where small size, and accurate

performance are required. The factory calibration for fixed

time delays is within 1% of the target time delay. The repeat

accuracy, under stable conditions, is 0.5% of the time delay.

The TSDB Series is rated to operate over an extended

temperature range. Time delays of 0.1 seconds to 1000 minutes

are available. The output is rated 1A steady and 10A inrush. The

modules are totally solid state and encapsulated to protect the

electronic circuitry.

Operation (Delay-on-Break)

Input voltage must be applied before and during timing. Upon

closure of the initiate switch, the output energizes. The time

delay begins when the initiate switch is opened. The output

remains energized during timing. At the end of the time delay,

the output de-energizes. The output will energize if the initiate

switch is closed when input voltage is applied.

Reset: Reclosing the initiate switch during timing resets the time

delay. Loss of input voltage resets the time delay and output.

Features & Benefits

FEATURES

BENEFITS

Microcontroller based

Repeat accuracy + / - 0.5%,

Factory calibration + / - 1%

Compact design

Allows flexiblility for OEM applications

1A Steady, 10A inrush

solid-state output

Provides 100 million operations in typical conditions.

Totally solid state

and encapsulated

No moving parts to arc and wear out over time and

encapsulated to protect against shock, vibration,

and humidity

Wide temperature

range: -40° to 75°C

Reliable in demanding commercial and

industrial applications

Accessories

P1004-13, P1004-13-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.

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.

Wiring Diagram

V = Voltage

UTL = Optional Untimed

Load

L =Timed Load

S1 = Initiate Switch

RT is used when

external adjustment

is ordered.

L1

N/L2

(Positive Switching)

Ordering Information

MODEL

INPUT

VOLTAGE

ADJUSTMENT

TIME DELAY

SWITCHING

MODE

TSDB320P

24VDC

External

0.1 - 10s

Positive

TSDB421

120VAC

External

1 - 100s

n/a

TSDB431

120VAC

Onboard

1 - 100s

n/a

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