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© 2021 Littelfuse, Inc.

Rev: 1-B-030121

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Time Delay Relays

DELAY-ON-MAKE

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Specifications

Time Delay

Type

Digital circuitry

Range

See "Ordering Information" table

Repeat Accuracy

±2 %

Fixed Time Tolerance

& Setting Accuracy

+/- 5 %

Reset Time

≤ 50 ms

Recycle Time

After timing: ≤ 20 ms

During timing: 0.1% of max. time delay or

75 ms, whichever is greater

Time Delay vs Temp.

& Voltage

≤ ± 5 %

Input

Voltage

120 V ac

Tolerance

120 V ac

-20 %–10 %

AC Line Frequency

50/60 Hz

Power Consumption

≤ 3.25W

Output

Type

Electromechanical relay

Form

Isolated, DPDT

Rating

8 A resistive @ 120/240 V ac;

1/3 hp @ 120/240 V ac

Life

Mechanical - 1x107;

Electrical - 1x106

Protection

Surge

IEEE C62.41-1991 Level A

Isolation Voltage

≥ 1500 V rms input to output

Insulation Resistance

≥ 100 MΩ

Polarity

Dc units are reverse polarity protected

Indication

Type

LED

Operation

During timing - flashing

Output energized - on steady

Mechanical

Mounting

Plug-in socket

Dimensions

H 44.45 mm (1.75”); W 60.33 mm (2.38”);

D (with socket) 104.78 mm (4.13”)

Termination

Octal 8-pin plug-in

Environmental

Operating/Storage

Temperature

-20° to 65°C / -30° to 85°C

Weight

≅ 4 oz (113 g)

Safety Marks

UL (socket required)*

UL 508 (E57310)

*UL Listed when used with Part Number OT08-PC or RB08-PC manufactured by

Custom Connector Corp.

Note: Manufacturer's recommended screw terminal torque for the OT series

sockets is 12 in-lbs.

Function Diagram

DELAY-ON-MAKE (ON-DELAY)

V = Voltage

NO = Normally

Open Contact

NC = Normally

Closed Contact

TD =Time Delay

R = Reset

= Undefined

Time