Data: MediumMedium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Max DC Output Current (total, not per-anode)Max DC Output Current120mA
Heater
Heater VoltageHeater Voltage
Notes
The PenA4 datasheet specifies that PenA4 should only be used with the IW4/350 rectifier, but IW3 is a related type.
Brans lists equivalents: DW15, IW4.
Valve_Equivalents lists IW3 as 'Double Diode' on B4 base with 4 V heater.
Full-wave rectifier with two anodes.
Peak Inverse Voltage is not explicitly stated in the Mazda IW3 datasheet; PIV=849 V is derived from the standard full-wave capacitor-input relation PIV = 2 × √2 × Va_max (300 Vrms). Matches the convention used for AZ12, UU4, UU5, EZ41 in this repo.
Ia_max corrected from 60 mA (per-anode) to 120 mA (total DC output) — repo convention uses output DC current throughout. Per-anode rating per r-type.org was 60 mA.
Pin Layout — B4
1Anode 1
2Heater / Cathode
3Heater
4Anode 2
Socket-Compatible Tubes ⚠ Not electrically compatible