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5727

Sensibly equivalent to:
CV4018 M8204
See also:
GE 5727 Box
    
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The 5727 is a xenon filled thyratron valve and previously known as Type 2D21. This example is of tetrode construction and was designed for relay or grid-controlled rectifier applications.
When a certain critical anode current flows the ionisation of the gas begins an avalanche discharge that overrides the grid control and leads to saturation current flow. The anode current can then only be extinguished by reducing the anode volts below the ionisation threshold.
The gm value in a normal hard valve is replaced by the control ratio parameter. In this valve the ratio is 250. At saturation the valve voltage drop is 8 Volts.
The GE logo, rectangular anode and on the left can be seen the heater and cathode.
The oval cathode tube and the top mica.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 48 mm tall.
References: Data-sheet & 1040.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
g2
a
g2

 

Absolute Maximum Operating Conditions
General Notes
Vh
Ah
Va
mAa
6.3
0.6
650
500
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 08, 2020.
shape:thin.glass.tube construction:all.glass type:thyratron age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.g2 pin:6.a pin:7.g2
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