ツェナーダイオード（英語：Zener diode）はダイオードの一種。別名を定電圧ダイオードともいい、その名の通り、一定の電圧（リファレンス）を得る目的で使用される素子である。
ツェナーダイオードが一般のダイオードと異なる点は、定電圧を得る目的で、降伏電圧が大幅に低くなるように設計されていることである。PN接合部に大量の不純物をドーピングし、P チャネルの価電子帯から N チャネルの伝導帯へ電子が移動しやすくなっている。この現象はトンネル効果によるもので、原子モデルでは共有結合のイオン化に該当する。
通常、このようなダイオードはすべて、降伏電圧によらず「ツェナーダイオード」の総称で市場に出回っている。
| 型番 | メーカ名 | 商品説明 |
|---|---|---|
| MMBZ5226B | Fairchild Semiconductor | |
| UZ8870 | Microsemi Corporation | |
| UZ8875 | Microsemi Corporation | |
| 1N5988B | Fairchild Semiconductor | |
| UZ8713 | Microsemi Corporation | |
| UZ7815 | Microsemi Corporation | |
| BZX55C10 | Fairchild Semiconductor | |
| BZX55C11 | Fairchild Semiconductor | |
| BZX55C12 | Fairchild Semiconductor | |
| BZX55C13 | Fairchild Semiconductor | |
| BZX55C15 | Fairchild Semiconductor | |
| BZX55C16 | Fairchild Semiconductor | |
| BZX55C18 | Fairchild Semiconductor | |
| BZX55C20 | Fairchild Semiconductor | |
| BZX55C22 | Fairchild Semiconductor | |
| BZX55C24 | Fairchild Semiconductor | |
| BZX55C27 | Fairchild Semiconductor | |
| BZX55C30 | Fairchild Semiconductor | |
| BZX55C33 | Fairchild Semiconductor | |
| BZX55C3V3 | Fairchild Semiconductor | |
| BZX55C3V6 | Fairchild Semiconductor | |
| BZX55C3V9 | Fairchild Semiconductor | |
| BZX55C4V3 | Fairchild Semiconductor | |
| BZX55C4V7 | Fairchild Semiconductor | |
| BZX55C5V1 | Fairchild Semiconductor | |
| BZX55C5V6 | Fairchild Semiconductor | |
| BZX55C6V2 | Fairchild Semiconductor | |
| BZX55C6V8 | Fairchild Semiconductor | |
| BZX55C7V5 | Fairchild Semiconductor | |
| BZX55C8V2 | Fairchild Semiconductor | |
| BZX55C9V1 | Fairchild Semiconductor | |
| 1N5993B | Fairchild Semiconductor | |
| UZ7860 | Microsemi Corporation | |
| UZ7812 | Microsemi Corporation | |
| UZ7806 | Microsemi Corporation | |
| UZ7727 | Microsemi Corporation | |
| 1N4728-4752 | Fairchild Semiconductor | |
| 1N5987B | Fairchild Semiconductor | |
| 1N752A | Fairchild Semiconductor | |
| 1N5989B | Fairchild Semiconductor | |
| 1N753A | Fairchild Semiconductor | |
| UZ8830 | Microsemi Corporation | |
| IN4738A | FAIRCHILD | |
| 1N746A-1N759A | Fairchild Semiconductor | |
| 1N759A | Fairchild Semiconductor | |
| 1N5997B | Fairchild Semiconductor | |
| 1N5996B | Fairchild Semiconductor | |
| BZX79C5V1 | Fairchild Semiconductor | |
| UZ8818 | Microsemi Corporation | |
| IN4728A | Fairchild Semiconductor | |
| 1N751A | Fairchild Semiconductor | |
| BZX84C6V2 | FAIRCHILD[Fairchild Semiconductor] | |
| UZ4220 | Microsemi Corporation | |
| 1N5990B | FAIRCHILD[Fairchild Semiconductor] | |
| UZ7830 | Microsemi Corporation | |
| 1N6002B | FAIRCHILD[Fairchild Semiconductor] | |
| 1N6003B | FAIRCHILD[Fairchild Semiconductor] | |
| 1N5085 | MICROSEMI[Microsemi Corporation] | |
| MMBZ5235B | FAIRCHILD[Fairchild Semiconductor] | |
| MMBZ5250B | FAIRCHILD[Fairchild Semiconductor] | |
| IN4744A | Fairchild Semiconductor | |
| 1N6021B | Fairchild Semiconductor | |
| MMBZ5243B | FAIRCHILD[Fairchild Semiconductor] | |
| UZ8718 | Microsemi Corporation | |
| UZ7840 | Microsemi Corporation | |
| UZ8736 | Microsemi Corporation | |
| 1N5610 | MICROSEMI | |
| BZX85C4V7 | FAIRCHILD[Fairchild Semiconductor] | |
| 1N5611 | MICROSEMI | |
| UZ8708 | Microsemi Corporation | |
| 1N750A | Fairchild Semiconductor | |
| 1N6022B | Fairchild Semiconductor | |
| JANTX1N4102UR | Microsemi Corporation | |
| JANTX1N4102UR-1 | Microsemi Corporation | |
| JANTX1N4102URTR-1 | Microsemi Corporation | |
| JANTXV1N4102UR | Microsemi Corporation | |
| JANTXV1N4102URTR | Microsemi Corporation | |
| JANTXV1N4102UR-1 | Microsemi Corporation | |
| JANTXV1N4102URTR-1 | Microsemi Corporation | |
| JANTX1N4102URTR | Microsemi Corporation |
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