© 2016 Littelfuse Protection Relays & Controls

Flashers and Tower Lighting Controls

Sequencing Controls

www.littelfuse.com/sc3-sc4

Rev: 1-A-062316

Specifications

SC3 / SC4 SERIES

Specifications

Technical Data

Operation

Sequential 3 circuit flashing of

incandescent lamp loads. Fixed rate.

For sequential 4 circuit and adjustable rates,

please contact the factory.

Rate

Fixed: 30 operations per minute (±10%)

Input

Voltage

120VAC ±15%

AC Line Frequency

50/60 Hz

Output

Type

Solid state

Rating

1A steady state per output

Mechanical

Mounting

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

Termination

0.25 in. (6.35 mm) male quick connect terminals

Dimensions

H 88.9 mm (3.5”); W 63.5 mm (2.5”);

D 31 mm (1.22”)

Protection

Circuitry

Encapsulated

Dielectric Breakdown

≥ 2000V RMS terminals to mounting surface

Insulation Resistance

≥ 100 MΩ

Environmental

Operating/Storage

Temperature

-20° to 60°C / -40° to 85°C

Humidity

95% relative, non-condensing

Weight

≅ 5.4 oz (153 g)

Flasher Function Diagram

FLASHER (CHASING)

SC4 shown.

For SC3, L4 is eliminated and L1TD

begins as soon as L3TD is completed.

4

V = Voltage

R = Reset

L1, L2, L3, L4 = Lamps

TD =Time Delay

(all are equal)