Tube cross-reference
5677 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5677 voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Where 5677 can be used as the replacement
In these recorded relationships, 5677 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5677.
Specialized - Switching Tube
The database records 5677 as a possible replacement forFA6.
No special restrictions are recorded for this substitution.
| Specification | 5677 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Switching Tube |
| Construction | Triode | MechanicalVacuumSwitch |
| Base | 5677 | Not recorded |
| Socket | B5D | Not recorded |
| Base pins | 5 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | Not recorded |
| Heater current | 0.06 A | Not recorded |
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 5677 specifications →