The ER21A is a small thyratron or gas filled relay. The Elesta company is based in Switzerland.
The cylinder forms one main electrode. Above the glass foot is a substantial ceramic insulator. The second main electrode is a flat plate with a small rectangular portion pressed out at 90 degrees. This small flap is close to the third element. The trigger electrode is a plain wire that ends a short distance away from the tip of the flap. To the right of the central cylinder.The thin glass tube envelope is 21 mm in diameter, and excluding the B9A base pins is 49 mm tall.Reference: 3002. |
Updated January 30, 2024.
|
|
