0A2
0A2 is also designated 150C2. Completed sales put the typical price at $11.99 per tube.
Description
The 0A2 is a voltage stabiliser tube with a miniature base, as described in the Philips datasheet.
Ratings and Characteristics
The tube has an average operating voltage of 150 V at an anode current of 17.5 mA. At this same anode current, the anode voltage is at least 144 V and at most 164 V. The starting voltage is at most 180 V. The anode current must remain between 5 mA (minimum) and 30 mA (maximum), with a maximum starting current of 75 mA. Voltage regulation is a maximum of 6 V for an anode current between 5 and 30 mA. The maximum capacitance of a shunt capacitor is 0.1 µF.
Operating Conditions
The 0A2 must be operated with the cathode negative and the anode positive. It is rated for an ambient temperature range of -55 to +90 °C. The tube should not be subjected to severe shock or continuous vibration.
| Designation | Evidence | Confidence |
|---|---|---|
| 150C2 | 40 independent documents | confirmed |
Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.
| Measure | Per tube |
|---|---|
| Median | $11.99 |
| Typical range (25th–75th) | $6.71 – $19.67 |
| Most sales (10th–90th) | $6.05 – $21.24 |
| Extremes incl. outliers | $1.54 – $30.15 |
| Completed sales | 31 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $14.99 | $7.00 – $16.34 | 9 |
| Sylvania | $21.22 | $13.90 – $21.24 | 5 |
| GE | $10.34 | $8.97 – $30.15 | 4 |
| Raytheon | $12.99 | $9.47 – $18.86 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $12.99 | 21 |
| used | $9.98 | 4 |
Per-tube prices from completed sales, 2026-08-01 to 2026-10-23. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 0A2, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Philips | 0A2 | PDF (356 KB) |
| Mazda-Belvu | 0A2 | PDF (233 KB) |
| RCA (HB3) | 0A2 | PDF (159 KB) |
| RCA (RC30) | 0A2 | PDF (148 KB) |
| Amperex | 0A2 | PDF (62 KB) |
| Brimar | 0A2 | PDF (45 KB) |
| Tung-Sol | 0A2 | PDF (45 KB) |
| EEV | 0A2 | PDF (34 KB) |
| Siemens | 150C2 | PDF (72 KB) |
| Mullard | 150C2 | PDF (57 KB) |
Documents held here and used to write this page.
- **PHILIPS**
- 150C2 (filed under 150C2)
6 further designations appear alongside 0A2 in the literature but below the evidence threshold used here, so they are not listed as equivalent.