GZ32

Rectifier — Octal

Philips

Known Equivalents & Substitutes

5V4G5V4GA5AQ4CV593CV274852KU83V

Electrical Specifications

Absolute Maximum

Anode Voltage (max)AC Voltage per Plate (max RMS, choke input)500V

Rectifier

Peak Inverse VoltagePeak Inverse Voltage1,400V

Voltage Drop (typical)Voltage Drop (approx. at 175 mA)25V

Max C-input Filter CapacitorMax C-input Filter Capacitor60µF

DC Output Current (max)DC Output Current (max, choke input)300mA

Peak Anode Current (surge)Peak Plate Current (per plate)

Heater

Heater VoltageHeater Voltage5V

Heater CurrentHeater Current2A

Notes

Indirectly heated (unipotential cathode) — provides controlled warm-up and reduced stress on filter capacitors compared to directly-heated rectifiers.
Capacitor-input filter requires minimum series resistance (Rt) that increases with capacitor value: 50 ohm for 16 µF, 100 ohm for 32 µF, 150 ohm for 60 µF.
Maximum DC output current depends on operating mode and AC input voltage: 300 mA at 2x300V (C-input), 250 mA at 2x350V (C-input), 125 mA at 2x500V (C-input), or up to 300 mA at 2x400V (choke-input).
The 5V4G/5V4GA is the American equivalent. Pin-compatible and electrically identical, though some American datasheets rate max DC output at 175 mA (capacitor-input) vs the Philips 125–300 mA rating which varies by applied voltage.
52KU is the Cossor designation for the same tube.

Pin Layout — Octal

1No Connection

2Heater

3No Connection

4

Socket-Compatible Tubes ⚠ Not electrically compatible

References