Film Disc Cut Out 4815920-G3

- RED DOT Film Disk Cut Out, for Series Sockets Breakover Voltage 250V minimum and 390V maximum.

CROSS REF:
Red DOT Film Disk Cut Out - Direct Replacement - 4815920-G3 GE 
4815920-G3 General Electric 35-440647-03 
Crouse Hinds 
779321 4815920G3
662050148745

DESCRIPTION:  250V / 390V Film Disc Cut Out 

Quantity per case:  100 / 50 minimum +10 pc increments

Application

• RED DOT Film Disk Cutout 
• Runway and Taxiway Inset Lights
  
• Wig Wag Film Disk Cutouts
• Inset Lights for Taxiway Center Line 
  

What is a Film Disc Cutout?
A film disc cutout, sometimes called an anti-fuse, can be thought of as a backward acting fuse. It blows on over voltage, not over current. When the film disc cutout blows, it shorts. It does not open like a regular fuse.

How it is used?
A film disc cutout, or anti-fuse, is used in series lighting. For example, series lighting is used on an airport runway. The runway is 2 miles long and there are lights spaced 100 feet apart. There is series lighting on each side of the runway, down the middle of the runway, side markers, taxiways, etc.

The Issue: If one bulb went out in the series, all of the bulbs went out.

The Solution is ...
The film disc cutout, or anti-fuse, eliminates this problem by being placed in parallel with the light bulb. When a bulb blows in series lighting, the voltage rapidly rises due to the lack of current flow. The film disc cutout, or anti-fuse, detects this high voltage and shorts leaving the rest of the lights burning. This easily allows a technician to know, exactly, which bulb has blown in the series. Film disc cutouts come in 4 different breakover voltages ranging from 30V to 390V.