Tube cross-reference
5727 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5727 specialized - thyratron. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 5727
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.
2D21W Specialized - Thyratron
- Base
- Not recorded
- Socket
- IO
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.6 A
Replacement tubes for 5727
The following tubes are recorded as possible replacements for 5727. This direction does not establish that 5727 can replace them.
Specialized - Thyratron
The database records 2D21W as a possible replacement for5727.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | Not recorded |
| Socket | B9A | IO |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Specialized - Thyratron
The database records EN91 as a possible replacement for5727.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Specialized - Thyratron
The database records M8204 as a possible replacement for5727.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | Not recorded |
Where 5727 can be used as the replacement
In these recorded relationships, 5727 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5727.
Specialized - Thyratron
The database records 5727 as a possible replacement forM8204.
No special restrictions are recorded for this substitution.
| Specification | 5727 replacement | Original tube |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | Not recorded |
Specialized - Thyratron
The database records 5727 as a possible replacement for2D21.
No special restrictions are recorded for this substitution.
| Specification | 5727 replacement | Original tube |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | B7G |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Specialized - Thyratron
The database records 5727 as a possible replacement for2D21W.
No special restrictions are recorded for this substitution.
| Specification | 5727 replacement | Original tube |
|---|---|---|
| Tube type | Specialized - Thyratron | Specialized - Thyratron |
| Construction | Thyratron | Thyratron |
| Base | E7-1 | Not recorded |
| Socket | B9A | IO |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 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 5727 specifications →