稳压二极管也称为 齐纳二极管，是一种利用二极管反向击穿特性进行稳压的电子元件。当反向电压达到或超过其击穿电压（齐纳电压）时，稳压管会进入击穿状态，并维持一个相对稳定的电压输出。这个稳定的电压值被称为稳压值，广泛应用于稳压电源和限幅电路中。
| 型号 | 品牌 | PD_Max/W | VZ_Min/V | VZ_Max/V | @ IZT/mA | ZZT_Max/Ω | IR_Max/μA | 封装 |
|---|---|---|---|---|---|---|---|---|
| SMF4737A | LEADSILICON | 1 | 34 | 5 | SOD-123FL | |||
| SMF4738A | LEADSILICON | 1 | 31 | 5 | SOD-123FL | |||
| SMF4739A | LEADSILICON | 1 | 28 | 0.5 | SOD-123FL | |||
| SMF4740A | LEADSILICON | 1 | 25 | 0.5 | SOD-123FL | |||
| SMF4741A | LEADSILICON | 1 | 23 | 0.1 | SOD-123FL | |||
| SMF4742A | LEADSILICON | 1 | 21 | 0.1 | SOD-123FL | |||
| SMF4743A | LEADSILICON | 1 | 19 | 0.1 | SOD-123FL | |||
| SMF4744A | LEADSILICON | 1 | 17 | 0.1 | SOD-123FL | |||
| SMF4745A | LEADSILICON | 1 | 15.5 | 0.1 | SOD-123FL | |||
| SMF4746A | LEADSILICON | 1 | 14 | 0.1 | SOD-123FL | |||
| SMF4747A | LEADSILICON | 1 | 12.5 | 0.1 | SOD-123FL | |||
| SMF4748A | LEADSILICON | 1 | 11.5 | 0.1 | SOD-123FL | |||
| SMF4749A | LEADSILICON | 1 | 10.5 | 0.1 | SOD-123FL | |||
| SMF4750A | LEADSILICON | 1 | 9.5 | 0.1 | SOD-123FL | |||
| SMF4751A | LEADSILICON | 1 | 8.5 | 0.1 | SOD-123FL | |||
| SMF4752A | LEADSILICON | 1 | 7.5 | 0.1 | SOD-123FL | |||
| SMF4753A | LEADSILICON | 1 | 7 | 0.1 | SOD-123FL | |||
| SMF4754A | LEADSILICON | 1 | 6.5 | 0.1 | SOD-123FL | |||
| SMF4755A | LEADSILICON | 1 | 6 | 0.1 | SOD-123FL | |||
| SMF4756A | LEADSILICON | 1 | 5.5 | 0.1 | SOD-123FL |