Tube cross-reference
12CK3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12CK3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12CK3
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.
12CL3 Rectifier - Damper Diode
- Base
- 9
- Socket
- Not recorded
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.6 A
Replacement tubes for 12CK3
The following tubes are recorded as possible replacements for 12CK3. This direction does not establish that 12CK3 can replace them.
Rectifier - Damper Diode
The database records 12CL3 as a possible replacement for12CK3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9 |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12DW4A as a possible replacement for12CK3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9HP |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Where 12CK3 can be used as the replacement
In these recorded relationships, 12CK3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12CK3.
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12AY3.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9HP |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12AY3A.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9HP |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12BS3.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12BS3A.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9HP |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12CL3.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9 |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 12CK3 as a possible replacement for12DW4A.
No special restrictions are recorded for this substitution.
| Specification | 12CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9HP |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | 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 12CK3 specifications →