The IW4-500 is an indirectly heated full wave rectifier that was designed to work with a maximum reservoir capacitor of 16 µF and to have an effective series resistance of 150 Ohms. At 500 Volts and 125 mA this rectifier would supply the needs of equipment of between 50 and 60 watt consumption. The cathode is connected to one side of the heater.

The classic envelope is of classic shape and 42 mm in diameter. The length excluding the B4 base pins, is 96 mm.

 
Pin Connections

B4	1	2	3	4
	a(1)	a(2)	h,k	h

 
Absolute Maximum Operating Conditions

Rectifier	Vh	Ah	Va	mAa
	4.0	2.5	500	120

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 12 June 2007 {find valves by name}