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GZ33

Sensibly equivalent to:
53KU CV378 CV5745 U54
    
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The GZ33 shares base pin layout with the GZ32 and the GZ34. All are full wave rectifiers with a rating of 500 Volts for the anodes. The GZ34 is an upgrade to the GZ32 and both are rated at 125 mA rectifier current. The GZ33, however, is a high current version and is rated at 250 mA rectified current, and unlike its lower rated counterparts is not given a maximum reservoir current rating, but 200 µF would seem a maximum value that would be used in practice. The cathode is tied to one side of the heater as heater-cathode insulation would not be sufficient to withstand the full voltage.
The classic envelope is 42 mm in diameter and, excluding the IO base pins, is 123 mm tall.
References: Datasheet & 1040. Type GZ33 was first introduced in 1954.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
M
h
nc
a(2)
nc
a(1)
nc
h,k

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
5.0
2.8
500
250
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2013.
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