© 2016 Littelfuse Protection Relays & Controls

Flashers and Tower Lighting Controls

Tower and Obstruction Lighting Controls

www.littelfuse.com/scr

Rev: 1-A-062316

SCR SERIES

Selection Range

SCR430T

SCR630T

700 W

a. 620 W

b. 120 V

c.

c.

a.

116 W

130 V

4L

3L

2L

1L

116 W

4L

3L

2L

1L

1.

2.

a. Lamp Wattage - Select the lamp wattage of the lamps in use.

b. Lamp Voltage - Select the lamp voltage shown on the lamp

(SCR430T)

c. Lamps ON - Select the number of lamps on during normal

operation. Only one lamp switch at a time may be transferred

to the right.

Programming Example

SCR430T

SCR630T

700 W

a. 620 W

b. 120 V

c.

c.

a.

116 W

130 V

4L

3L

2L

1L

116 W

4L

3L

2L

1L

1.

2.

Example Shown: SCR430T-620 watts at 120 VAC lamps, two lamps

are ON during normal operation.

STEP

1. Select lamp wattage: 116 or 620 watts

2. Select the number of lamps ON (1 thru 4) during normal

operation. Only one lamp switch may be ON (RIGHT) at any time.

Specifications

Operation

Lamp Monitoring

Capacity (in lamps)

100W

116W

620W

700W

SCR430T 120VAC Lamps

4

4

4

n/a

SCR630T 230VAC Lamps

n/a

4

n/a

4

Time Delay

Trip Delay

Factory fixed ≅ 6s

Input

Input Voltage/Tolerance

SCR430T - 120VAC ±10%

SCR630T - 230VAC ±10%

AC Line Frequency

50/60Hz

Output

To operate a spare lamp or alarm

Line Voltage Output

(Solid-state Rated)

≤ 125W @ 120VAC

≤ 250W @ 240VAC

Isolated Alarm Output (SPDT) 10A @ 240VAC or 30VDC resistive;

1/4 hp @ 125VAC; 1/2 hp @ 250VAC

Mechanical

Mounting

Two #6 (M3.5 x 0.6) screws

Dimensions

H 88.9 mm (3.5”); W 63.5 mm (2.5”);

D 44.5 mm (1.75”)

Termination

Screws with captive clamps for up to 14 AWG

(2.45 mm2) wire

Protection

Circuitry

Encapsulated

Environmental

Operating Temperature

-55° to 65°C

Weight

≅ 6.8 oz (193 g)