Tube cross-reference
4ES8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 4ES8 voltage - dual triode (similar high frequency). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 4ES8
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.
XCC189 Voltage - Dual Triode (similar)
- Base
- Not recorded
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 4.5 V
- Heater current
- 0.6 A
Replacement tubes for 4ES8
The following tubes are recorded as possible replacements for 4ES8. This direction does not establish that 4ES8 can replace them.
Voltage - Dual Triode (similar)
The database records XCC189 as a possible replacement for4ES8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 4 V | 4.5 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Dual Triode (similar high frequency)
The database records 4KN8 as a possible replacement for4ES8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 4 V | 4.2 V |
| Heater current | 0.6 A | 0.6 A |
Where 4ES8 can be used as the replacement
In these recorded relationships, 4ES8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 4ES8.
Voltage - Dual Triode (similar)
The database records 4ES8 as a possible replacement forXCC189.
No special restrictions are recorded for this substitution.
| Specification | 4ES8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 4 V | 4.5 V |
| Heater current | 0.6 A | 0.6 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 4ES8 specifications →