Tube cross-reference
EC55 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EC55 power - triode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of EC55
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.
5861 Power - Triode
- Base
- DISC SEAL
- Socket
- Not recorded
- Base pins
- Not recorded
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.4 A
Replacement tubes for EC55
The following tubes are recorded as possible replacements for EC55. This direction does not establish that EC55 can replace them.
Power - Triode
The database records 5861 as a possible replacement forEC55.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Triode | Power - Triode |
| Construction | Triode | Triode |
| Base | Not recorded | DISC SEAL |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Where EC55 can be used as the replacement
In these recorded relationships, EC55 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EC55.
Power - Triode
The database records EC55 as a possible replacement for5861.
No special restrictions are recorded for this substitution.
| Specification | EC55 replacement | Original tube |
|---|---|---|
| Tube type | Power - Triode | Power - Triode |
| Construction | Triode | Triode |
| Base | Not recorded | DISC SEAL |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 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 EC55 specifications →