Tube cross-reference
40SUA alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 40SUA rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 40SUA
The following tubes are recorded as possible replacements for 40SUA. This direction does not establish that 40SUA can replace them.
Rectifier - Half Wave
The database records 1D5 as a possible replacement for40SUA.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | B4 | IO |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 40 V | 4 V |
| Heater current | 0.2 A | 0.2 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 40SUA specifications →