▼ Menu

43IU

Sensibly equivalent to:
1561 1821 1867 1867 441U 442BU 460BU 506BU A11B A11C A11D APV4 APV4 CV1039 CV3760 DW2 DW4-500 DW4/350 IW4-350 IW4-500 MU12 MU14 R1 R2 R3 R42 R4A U10 U12 U14 UU120/350 UU120/500 UU60/250
    
Extras ▼

 

This Cossor rectifier, 43-IU (43IU), is a full wave device with an indirectly heated cathode that is tied to one side of the heater.
With printed lettering on the glass and the classic shouldered envelope shape this looks to be an example of later production than 43IU.
The anode has yet another design in this later example.
Thanks to Mark Mallison for sending the images.
The classic envelope is 45 mm in diameter, and excluding the B4 base pins is 104 mm tall.
References: 1040 & 1043. Type 43IU was first introduced in 1937.

 

Pin Connections
B4
1
2
3
4
a(2)
a(1)
f
f

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
4.0
2.5
350
120
Updated October 13, 2019.
shape:classic construction:pinch type:rectifier.fw age:1930.1940 base:b4 heater:4.0v pins:4 pin:1.a(2) pin:2.a(1) pin:3.f pin:4.f
Return to Main Index