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VR54

Sensibly equivalent to:
1638 ARDD5 CV1054 EB34 OM3
    
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The VR54 contains a pair of screened signal diodes with separate cathodes. The glass envelope has been further screened with an external copper metalisation that has then be painted.
The interesting thing about this exhibit is that the envelope is shaped and most VR54's had a tubular envelope.
The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins, is 63 mm tall.
References: Datasheet, 1040 & 1043. Type VR54 was first introduced in 1941.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
a(2)
k(2)
a(1)
-
h
k(1)

 

Absolute Maximum Operating Conditions
Diode
Vh
Ah
Va
mAa
6.3
0.2
200
0.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 29, 2013.
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