0A2WA
0A2WA has no equivalent designation confirmed by the archive. Completed sales put the typical price at $11.70 per tube.
The 0A2WA is a gas-filled voltage-regulator tube that provides a stabilized voltage of 150 V for currents between 5 and 30 mA. It has a seven-pin miniature base type 7C10 and a net weight of 10.5 g. The tube can be mounted in all positions.
Ratings and Characteristics
The cathode current range is from 5 mA minimum to 30 mA maximum. The nominal internal voltage drop is 150 V; at currents of 5 mA, 20 mA, and 30 mA, the internal voltage drop is between 144 V and 153 V. Maximum regulation is 5.0 V. The maximum striking voltage is 165 V, both in darkness and at an illumination between 50 and 500 lux. The maximum instantaneous striking current is 75 mA, for a maximum duration of 10 seconds. The maximum shunt capacitor value for the circuit is 0.1 µF. The bulb temperature range is from -55 °C to 150 °C.
Applications
The 0A2WA is intended for use in regulated-voltage circuits, stabilized power supplies, and high-voltage bias sources.
Mechanical and Environmental Specifications
The datasheet specifies that the tube can withstand five shocks of 450 g applied successively in four directions along three perpendicular axes. It also specifies sinusoidal vibration applied successively along three perpendicular directions for 3 times 24 hours, with acceleration of 2.5 g and frequency of 25 Hz.
Operating Notes
After a period of high-current operation, up to 20 minutes may pass before the tube returns to normal regulation conditions. The regulation range of a tube can change after a long period of rest. The datasheet states that the tube was formerly manufactured by Société Française Radio-Electrique, merged with C.S.F., and was developed under contract for the Service Technique des Télécommunications de l'Air.
| Measure | Per tube |
|---|---|
| Median | $11.70 |
| Typical range (25th–75th) | $8.46 – $14.75 |
| Most sales (10th–90th) | $4.95 – $40.13 |
| Extremes incl. outliers | $1.49 – $86.89 |
| Completed sales | 37 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| Sylvania | $9.91 | $5.50 – $15.83 | 10 |
| Philips | $11.70 | $11.70 – $11.70 | 9 |
| RCA | $10.85 | $8.46 – $14.75 | 8 |
| GE | $8.50 | $8.00 – $11.92 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $11.70 | 27 |
| used | $11.70 | 8 |
Per-tube prices from completed sales, 2025-08-31 to 2026-09-09. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 0A2WA, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| CSF | 0A2WA | PDF (374 KB) |
| Raytheon | 0A2WA | PDF (361 KB) |
| Mazda-Belvu | 0A2WA | PDF (275 KB) |
| Philips | 0A2WA | PDF (213 KB) |
| EEV | 0A2WA | PDF (38 KB) |
Documents held here and used to write this page.
- VALEURS LIMITES DES CARACTÉRISTIQUES
1 further designation appears alongside 0A2WA in the literature but below the evidence threshold used here, so it is not listed as equivalent.