▼ Menu

U404

Sensibly equivalent to:
U118 U145
See also:
Mazda 10C1, 10F9, 10LD11, 10P13 & U404 Advert - Mazda 10LD11, 10P13, 10P14 & U404 Advert - Mazda 10F9 + 10C1, 10LD11, 10P13, 10P14 & U404 Advert
    
Extras ▼

 

The U404 is a half-wave rectifier for AC/DC radio sets without a transformer. The 100 mA heater is for heater chain use across the mains.
The U404 has a maximum reservoir capacitor rating of 50 μF and must have 180 Ω of series resistance to limit the current surge.
Thanks to Jonathan Marsh for sending the image.
The thin glass tube envelope is 19 mm in diameter, and excluding the B8A base pins is 60 mm tall.
Reference: 1040. Type U404 was first introduced in 1947.

 

Pin Connections
B8A
1
2
3
4
5
6
7
8
h
a
-
ic
ic
ic
k
h

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
40
0.1
250
90
Updated April 27, 2013.
Return to Main Index