Rectifier - Full Wave ·Rectifier-Rectifier
UU12
Mazda UU12 (EZ81) indirectly heated full-wave rectifier with two anodes and common cathode, 6.3 V 1 A heater, B9A base.
- Sections
- 2
- Base
- B9A
- Socket code
- -
- Base pins
- 9
- Nominal heater
- 6.3 V / 1 A
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- B9A
- Socket code
- -
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 1 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
B9A - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Rectifier
- Rectifier peak inverse voltage
- 1300 V
- Rectifier peak forward current
- 500 mA
- Rectifier max heater-cathode voltage
- 500 V
Mazda UU12/EZ81 each anode: PIV max 1300 V, peak forward current max 500 mA, surge forward current max 1.8 A. Heater-negative-to-cathode limit 500 V. Full-wave total DC output is shared across both anodes; capacitor input 50 µF max. Typical total DC output 160 mA at 250 V RMS/anode, 150 mA at 350 V, 100 mA at 450 V.
Section 2
Rectifier
- Rectifier peak inverse voltage
- 1300 V
- Rectifier peak forward current
- 500 mA
- Rectifier max heater-cathode voltage
- 500 V
Mazda UU12/EZ81 each anode: PIV max 1300 V, peak forward current max 500 mA, surge forward current max 1.8 A. Heater-negative-to-cathode limit 500 V. Full-wave total DC output is shared across both anodes; capacitor input 50 µF max. Typical total DC output 160 mA at 250 V RMS/anode, 150 mA at 350 V, 100 mA at 450 V.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.