Tube cross-reference
12AF3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12AF3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12AF3
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
12BR3 Rectifier - Damper Diode
- Base
- E9-11
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.6 A
Replacement tubes for 12AF3
The following tubes are recorded as possible replacements for 12AF3. This direction does not establish that 12AF3 can replace them.
Rectifier - Damper Diode
The database records 12BR3 as a possible replacement for12AF3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9CB | E9-11 |
| Socket | Not recorded | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Verify before substituting
Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.
View the complete 12AF3 specifications →