Tube cross-reference
1A3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1A3 diode (not rectifier). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 1A3
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.
DA90 Diode (NOT rectifier)
- Base
- Miniature
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 1.4 V
- Heater current
- 0.15 A
Replacement tubes for 1A3
The following tubes are recorded as possible replacements for 1A3. This direction does not establish that 1A3 can replace them.
Voltage Radio Detector Converter
The database records 1D13 as a possible replacement for1A3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Voltage Radio Detector Converter |
| Construction | Diode | Diode |
| Base | 5AP | Not recorded |
| Socket | B7G | Not recorded |
| Base pins | 7 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 A |
Diode (NOT rectifier)
The database records DA90 as a possible replacement for1A3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode | Diode |
| Base | 5AP | Miniature |
| 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 1A3 can be used as the replacement
In these recorded relationships, 1A3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1A3.
Voltage Radio Detector Converter
The database records 1A3 as a possible replacement for1D13.
No special restrictions are recorded for this substitution.
| Specification | 1A3 replacement | Original tube |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Voltage Radio Detector Converter |
| Construction | Diode | Diode |
| Base | 5AP | Not recorded |
| Socket | B7G | Not recorded |
| Base pins | 7 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 A |
Diode (NOT rectifier)
The database records 1A3 as a possible replacement forDA90.
No special restrictions are recorded for this substitution.
| Specification | 1A3 replacement | Original tube |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode | Diode |
| Base | 5AP | Miniature |
| 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 1A3 specifications →