Tube cross-reference
12BR3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12BR3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12BR3
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.
12AF3 Rectifier - Damper Diode
- Base
- 9CB
- Socket
- Not recorded
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.6 A
Where 12BR3 can be used as the replacement
In these recorded relationships, 12BR3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12BR3.
Rectifier - Damper Diode
The database records 12BR3 as a possible replacement for12AF3.
No special restrictions are recorded for this substitution.
| Specification | 12BR3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | E9-11 | 9CB |
| Socket | B9A | Not recorded |
| 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 12BR3 specifications →