© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Delay-on-Make

www.littelfuse.com/ksd1

Rev: 1-A-062116

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.

External Resistance vs.Time Delay

This chart applies to externally adjustable part numbers.

The time delay is adjustable over the time delay range selected by varying

the resistance across the RT terminals; as the resistance increases the tie

delay increases.

When selecting an external RT, add the tolerances of the timer and the RT

for the full time range adjustment.

Examples: 1 to 50 S adjustable time delay, select time delay range 1 and

a 50 K ohn RT. For 1 to 100 S use a 100 K ohm RT.

Function Diagram

DELAY-ON-MAKE (ON-DELAY)

V = Voltage

NO = Normally

Open Contact

NC = Normally

Closed Contact

TD =Time Delay

R = Reset

= Undefined

Time

KSD1 SERIES

Specifications

Time Delay

Range

0.1s - 1000m in 6 adjustable ranges or fixed

Repeat Accuracy

±0.5% or 20ms, whichever is greater

Tolerance

(Factory Calibration)

≤ ±5%

Recycle Time

≤ 150ms

Time Delay vs. Temperature

& Voltage

≤ ±10%

Input

Voltage

24, 120, or 230VAC; 12 or 24VDC

Tolerance

±20%

AC Line Frequency

50/60 Hz

Output

Type

Solid state

Form

NO, open during timing

Maximum Load Current

1A steady state, 10A inrush at 60°C

Minimum Holding Current

≤ 40mA

OFF State Leakage Current

≅ 7mA @ 230VAC

Voltage Drop

≅ 2.5V @ 1A

Protection

Circuitry

Encapsulated

Dielectric Breakdown

≥ 2000V RMS terminals to mounting surface

Insulation Resistance

≥ 100 MΩ

Polarity

DC units are reverse polarity protected

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 60°C / -40° to 85°C

Humidity

95% relative, non-condensing

Weight

≅ 2.4 oz (68 g)