6BW4

Rectifier — Noval

Known Equivalents & Substitutes

12BW4

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Max AC Plate Supply Voltage Each Plate (RMS)450V

Heater-to-Cathode Voltage (max)Max Heater-Cathode Voltage (Heater Negative, DC)450V

Rectifier

Peak Inverse VoltageMaximum Peak Inverse Plate Voltage1,275V

Voltage Drop (typical)Tube Voltage Drop40V

Max C-input Filter CapacitorMax Filter Input Capacitor40µF

DC Output Current (max)DC Output Current100mA

Peak Anode Current (surge)Max Steady State Peak Plate Current Each Plate

other

Max Transient Peak Plate Current Each PlateMax Transient Peak Plate Current Each Plate2A

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.9A

Notes

12BW4 is identical except for heater ratings (12.6V at 0.45A).
Predecessor type is 7Z4 (same function, different base).
May be mounted in any position.
Maximum heater-cathode voltage (heater negative, DC) is 450V — relevant when cathode is elevated above ground potential.
Capacitor-input filter operation requires minimum 82 ohm effective plate supply resistance per plate with 40uF max filter capacitor.

Pin Layout — Noval

1Anode 2

2No Connection

3No Connection

References

350mA

Min Series Resistance (C-input)Min Effective Plate Supply Resistance Each Plate82Ω

4Heater

5Heater

6No Connection

7Anode 1

8No Connection

9Cathode