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12E1

Sensibly equivalent to:
5B/351D CV345 CV8025
See also:
Series Pass Valves - Stabilized Power Supplies - Mazda 12E1 Advert
    
Extras ▼

 

The 12E1 is a specialist series pass valve for use in stabilised power supplies. This function makes high demands on the cathode as the average current is normally much higher than in other applications.
We also have a rugged version 12E1R.
The beam plate can be seen within the anode as can the two grids. The grid wires are shaped and pass flat across the face of the cathode.
The valve is also marked as a CV345 indicating direct equivalence.
The classic envelope is 54 mm in diameter and, excluding the IO base pins, is 129 mm tall.
References: Datasheet & 1040. Type 12E1 was first introduced in 1952.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
-
h
-
g2
g1
-
h
k
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
6.3
1.6
800
300
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 26, 2017.
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