| 1N3506 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3517 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3518 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3521 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3522 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3523 | Central Semiconductor | Leaded Zener Diode General Purpose |
| 1N3530 | Central Semiconductor | Leaded Zener Diode General Purpose |