© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Dedicated - Delay-on-Break

Rev: 1-A-062216

www.littelfuse.com/orb

Specifications

Time Delay

Type

Analog circuitry

Range

0.05 - 300s in 5 adjustable ranges or fixed

Repeat Accuracy

±2% or 20ms, whichever is greater

Tolerance

(Factory Calibration)

Adjustable: guaranteed range

Fixed: ±10%

Reset Time

≤ 50ms

Initiate Time

≤ 70ms

Time Delay vs Temp.

& Voltage

≤ ±10%

Input

Voltage

24, 120, or 230VAC

Tolerance

24VAC

-15% - 20%

120 & 230VAC

-20% - 10%

AC Line Frequency

50/60 Hz

Power Consumption

2.25W

Output

Type

Electromechanical relay

Form

Isolated, SPDT or DPDT

Rating

10A resistive @ 120/240VAC & 28VDC;

1/3 hp @ 120/240VAC

Life

Mechanical - 1x107; Electrical - 1x106

Protection

Isolation Voltage

≥1500V RMS input to output

Mechanical

Mounting

Surface mount with four #6 (M3.5 x 0.6) screws

Dimensions

H 53.8 mm (2.12”); W 93.7 mm (3.69”);

D 47.8 mm (1.88”)

Termination

0.25 in. (6.35 mm) male quick connect terminals

Environmental

Operating/Storage

Temperature

-20° to 65°C / -30°to 85°C

Weight

≅ 2.7 oz (77 g)

ORB SERIES

Selection Guides

Function Diagram

DELAY-ON-BREAK (OFF-DELAY)

V = Voltage

S1 = Initiate Switch

NO = Normally

Open Contact

NC = Normally

Closed Contact

TD =Time Delay

t = Incomplete

Time Delay

R = Reset

= Undefined

Time