Díodos Zener

Um díodo Zener (assim designado em homenagem ao físico Clarence Zener) é um díodo especialmente concebido para operar na zona de ruptura, isto é, inversamente polarizado e sujeito a uma tensão pouco superior à sua tensão de ruptura: a tensão de Zener. Esta tensão é muito estável e bem definida, razão pela qual estes díodos são normalmente empregues como estabilizadores de tensão. Note que, quando um díodo Zener opera na zona de ruptura, a corrente flui do cátodo (K) para o ânodo (A).

A tabela seguinte apresenta uma vasta selecção de díodos Zener padrão (tolerância de 5%), ordenados de acordo com a sua tensão de Zener e potência nominal.

	400mW	500mW	1W	3W	5W
2,4V	–	1N5221B BZX79C2V4	–	–	–
2,5V	–	1N5222B	–	–	–
2,7V	–	1N5223B BZX79C2V7	–	–	–
2,8V	–	1N5224B	–	–	–
3V	–	1N5225B BZX79C3V0	–	–	–
3,3V	1N746A	1N5226B BZX79C3V3	1N4728A BZX85C3V3	1N5913B	1N5333B
3,6V	1N747A	1N5227B BZX79C3V6	1N4729A BZX85C3V6	–	1N5334B
3,9V	1N748A	1N5228B BZX79C3V9	1N4730A BZX85C3V9	–	1N5335B
4,3V	1N749A	1N5229B BZX79C4V3	1N4731A BZX85C4V3	–	1N5336B
4,7V	1N750A	1N5230B BZX79C4V7	1N4732A BZX85C4V7	1N5917B	1N5337B
5,1V	1N751A	1N5231B BZX79C5V1	1N4733A BZX85C5V1	–	1N5338B
5,6V	1N752A	1N5232B BZX79C5V6	1N4734A BZX85C5V6	1N5919B	1N5339B
6,0V	–	1N5233B	–	–	1N5340B
6,2V	1N753A	1N5234B BZX79C6V2	1N4735A BZX85C6V2	1N5920B	1N5341B
6,8V	1N754A	1N5235B BZX79C6V8	1N4736A BZX85C6V8	1N5921B	1N5342B
7,5V	1N755A	1N5236B BZX79C7V5	1N4737A BZX85C7V5	–	1N5343B
8,2V	1N756A	1N5237B BZX79C8V2	1N4738A BZX85C8V2	1N5923B	1N5344B
8,7V	–	1N5238B	–	–	1N5345B
9,1V	1N757A	1N5239B BZX79C9V1	1N4739A BZX85C9V1	1N5924B	1N5346B
10V	1N758A	1N5240B BZX79C10	1N4740A BZX85C10	1N5925B	1N5347B
11V	–	1N5241B BZX79C11	1N4741A BZX85C11	1N5926B	1N5348B
12V	1N759A	1N5242B BZX79C12	1N4742A BZX85C12	1N5927B	1N5349B
13V	–	1N5243B BZX79C13	1N4743A BZX85C13	–	1N5350B
14V	–	1N5244B	–	–	1N5351B
15V	–	1N5245B BZX79C15	1N4744A BZX85C15	1N5929B	1N5352B
16V	–	1N5246B BZX79C16	1N4745A BZX85C16	1N5930B	1N5353B
17V	–	1N5247B	–	–	1N5354B
18V	–	1N5248B BZX79C18	1N4746A BZX85C18	1N5931B	1N5355B
19V	–	1N5249B	–	–	1N5356B
20V	–	1N5250B BZX79C20	1N4747A BZX85C20	1N5932B	1N5357B
22V	–	1N5251B BZX79C22	1N4748A BZX85C22	1N5933B	1N5358B
24V	–	1N5252B BZX79C24	1N4749A BZX85C24	1N5934B	1N5359B
25V	–	1N5253B	–	–	1N5360B
27V	–	1N5254B BZX79C27	1N4750A BZX85C27	1N5935B	1N5361B
28V	–	1N5255B	–	–	1N5362B
30V	–	1N5256B BZX79C30	1N4751A BZX85C30	1N5936B	1N5363B
33V	–	1N5257B BZX79C33	1N4752A BZX85C33	1N5937B	1N5364B
36V	–	1N5258B BZX79C36	1N4753A BZX85C36	1N5938B	1N5365B
39V	–	1N5259B BZX79C39	1N4754A BZX85C39	–	1N5366B
43V	–	1N5260B BZX79C43	1N4755A BZX85C43	1N5940B	1N5367B
47V	–	1N5261B BZX79C47	1N4756A BZX85C47	1N5941B	1N5368B
51V	–	1N5262B BZX79C51	1N4757A BZX85C51	1N5942B	1N5369B
56V	–	1N5263B BZX79C56	1N4758A BZX85C56	1N5943B	1N5370B
60V	–	–	–	–	1N5371B
62V	–	–	–	1N5944B	1N5372B
68V	–	–	–	–	1N5373B
75V	–	–	–	1N5946B	1N5374B
82V	–	–	–	1N5947B	1N5375B
91V	–	–	–	1N5948B	1N5377B
100V	–	–	–	–	1N5378B
110V	–	–	–	1N5950B	–
120V	–	–	–	1N5951B	1N5380B
130V	–	–	–	1N5952B	1N5381B
150V	–	–	–	1N5953B	1N5383B
160V	–	–	–	1N5954B	1N5384B
180V	–	–	–	1N5955B	1N5386B
190V	–	–	–	–	1N5387B
200V	–	–	–	1N5956B	1N5388B