Tube cross-reference
DA90 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the DA90 diode (not rectifier). Compare core specifications and verify every restriction before using a replacement.
Exact variations of DA90
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.
1A3 Diode (NOT rectifier)
- Base
- 5AP
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 1.4 V
- Heater current
- 0.15 A
Replacement tubes for DA90
The following tubes are recorded as possible replacements for DA90. This direction does not establish that DA90 can replace them.
Diode (NOT rectifier)
The database records 1A3 as a possible replacement forDA90.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode | Diode |
| Base | Miniature | 5AP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 A |
Where DA90 can be used as the replacement
In these recorded relationships, DA90 is the replacement tube. The listed original tubes are not automatically suitable as replacements for DA90.
Diode (NOT rectifier)
The database records DA90 as a possible replacement for1A3.
No special restrictions are recorded for this substitution.
| Specification | DA90 replacement | Original tube |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode | Diode |
| Base | Miniature | 5AP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 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 DA90 specifications →