Western electric 376 c brochure

Page 1

BELL SYSTEM PRACTICES AB46.376C
Transmission Engineering and Data Issue 1, January 1962
Electron Tube Data A.T.& T. Co. Standard

ELECTRON TUBE DATA SHEET
WESTERN ELECTRIC 376C ELECTRON TUBE

DESCRIPTION

The 3760 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
requiring a high current rated tube.

CHARACTERISTICS

Peak Anode Voltage- - - - - . . - - - - - - - - - - 275 volts
Average Cathode Current - - - . - - - - - - - - - - 20 200 milliamperes
Average Life, Approximate - - ~ . - - - - - ' - - . 10000 10 hours

File: Cold Cathode Section

© American Telephone and Telegraph Company 1962 376C

Page 2

3760-PAGE2

MAXIMUM RATINGS, Absolute System (Notel)

Inverse Peak Anode Voltage-

Forward Peak Anode Voltage.

Forward Cathode Current(NoteZ)

Peak . . . . . .
Average

Averaging Time -
Inverse Peak Anode Current (Note 2) --
Peak Starter Current (Note 2)

Forward - - « . -

Inverse . - -
Ambient Temperature Limits

ELECTRICAL DATA, Throughout Life

Starter Breakdown Voltage(Note3) .
Starter Voltage Drop at 20 Milliamperes
Anode Voltage Drop at 30 Milliamperes .
Transfer Current

Ionization Time, Starter Gap(N0te4)

Deionization Time, Main Gap. Approx1mate-

MECHANICAL DATA

Mounting Position - .
Net Weight, Approximate

200
275

200
70
2

5

100

1
-55 to +85

Min. Bogey Max.

67 75 85
52 60 74
60 7O 80

.See curve - Fig. 3

_ 2 -
- 3 _

Dimensions and pin connections shown in outline drawing on Page 4.

HANDLING

volts
volts

milliamperes
milliamperes

seconds
milliamperes

milliamperes
milliampere
centigrade

volts
volts
volts

milliseconds
milliseconds

1 Ounce

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.

Note 1: In the "Absolute System" the maximum ratings specified are limiting values above which the
serviceability of the device may be impaired from the viewpoint of life and satisfactory
performance. Maximum ratings, as such, do not constitute a set of operating conditions and
all values may not, therefore, be attained simultaneously.

Note 2: Sufficient resistance must be used in series with the tube to assure that the electrode

currents do not exceed their maximum rated values

Note 3: Limit applies immediately after tube has conducted current

value initially may be as much as 3 volts higher or lower.

If tube has been idle, this