Western electric 313 ca brochure

Page 1

BELL SYSTEM PRACTICES A346. 313CA
Transmission Engineering and Data Issue 3, January 1962
Electron Tube Data A.T.& T. Co. Standard

i ELECTRON TUBE DATA SHEET
WESTERN ELECTRIC 3|3CA ELECTRON TUBE

DESCR I PT I ON

The 3130A is a three-electrode, inert-gas-filled, cold cathode tube for use in
relay, voltage regulator, or rectifier circuits. This tube is especially suitable
for use in control circuits such as in triggering, counting, or switching apparatus.

CHARACTERISTICS

Peak Anode Voltage . . . . . . . . . . . . . . . . 200 volts

Average Cathode Current - - - . - - - - - - . - - - 7 72 milliamperes
. Average Life, Approximate . - - . . . - . . . . . - 10000 10 hours
. File: Cold Cathode Section

© American Telephone and Telegraph Company 1962 3I3CA

Page 2

3|3CA -PAGE 2

MAXIMUM RATINGS, Absolute System (Notel)

Forward Peak Anode Voltage- - - - ~ - - - - > - - - ~ 200 volts
Forward Cathode Current (Note 2

Peak. . . . . . . . . . . . . . . . . . . . . . . 72 milliamperes
Average . . . . . . . . . . . . . . . . . . . . . 25 milliamperes
Averaging Time . . - - - . - - - - - - - - - - 2 seconds
Peak Inverse Anode Current (Note 2)- . - - - - - - - . - 5 milliamperes
Ambient Temperature Limits. - - - . - - - - - - . - - -55 to +85 centigrade

ELECTRICAL DATA, Throughout Life

Min. Bogey Max.

Starter Breakdown Voltage (Note 3) - ~ - . . - , - - 66 72 78 volts
Starter Voltage Drop at 20 milliamperes . . . . . . 52 60 74 volts
Anode Voltage Drop at 20 milliamperes - - . ~ - - - 68 75 88 volts
Transfer Current - - ~ - - - - - - . - . - - . - See curve - Fig. 1

Ionization Time - starter Gap(Note4). . . - - - - - - 6 - milliseconds
Deionization Time. Approximate

Starter Gap. . - - . - - - - 3 - milliseconds
Main Gap - - - . - 10 - milliseconds

- 3 milliamperes

I

Inverse Current at -120 Volts Anode Potential MECHANICAL DATA

Mounting Position. . . . . . . . . . . .'. . . . . . . . . . . . . Any
Net Weight, Approximate . - . . - - . - . . - . - . - - 1 Ounce
Dimensions and Pin Connections shown in outline drawing on page 4,

HANDLING

This tube contains a small amount of krypton-85 gas which is a by-product
radioactive material. The amount of krypton-85 is less than five microcuries, which
is too small an amount to require any special care in use.

Atomic Energy Commission regulations require that the individual tube carton
for tubes containing by-product radioactive material be appropriately marked. The
marking includes the statement that tube disposal should be in approved manner.

Approved instructions for disposal of tubes containing krypton-85 are as
follows;

Tubes to be disposed of should be broken or crushed in a well
ventilated place releasing any resulting vapors to the outside
atmosphere. The residual broken or crushed tubes should be dis-
posed of in a normal public trash disposal system. Tubes should be
disposed of at a rate of not more than 100 each week from any one
location. Avoid breathing vapors from broken tubes.