Zener Diodes

A ‌Zener Diode‌ is a specialized semiconductor device engineered to ‌maintain a stable reference voltage‌ in circuits by operating reliably in its ‌reverse breakdown region‌. Unlike standard diodes (which break down destructively under reverse bias), Zener diodes leverage controlled reverse breakdown for precise voltage regulation, surge protection, and signal clipping.

‌Core Working Principle‌:

1‌. Reverse Breakdown Mechanism‌:

Zener Effect‌: Dominates below ‌5.6V‌ – quantum tunneling of electrons across the PN junction.

Avalanche Effect‌: Dominates above ‌5.6V‌ – impact ionization creating electron "avalanches".
→ Both maintain near-constant voltage (VZ​) across the diode during reverse conduction.

2‌.Self-Recovery:

Unlike fuses or MOVs, Zener diodes revert to blocking mode when voltage drops below VZ​.

Part Number

Marking

Package

PD

W

Vz @ Izt 

Nom.
(V)

Min.
(V)

Max.
(V)

ZZT

Max.

(Ω)

 @ Izt

(mA)

ZZK

Max.

(Ω)

 @ Izk

(mA)

IR(μA)

Max.

 @VR
(V)

1N5340A
DO-27
5
6
5.70
6.30
1
200
300
1
1
3
1N5341A
DO-27
5
6.2
5.89
6.51
1
200
200
1
1
3
1N5342A
DO-27
5
6.8
6.46
7.14
1
175
200
1
10
5.2
1N5343A
DO-27
5
7.5
7.13
7.88
1.5
175
200
1
10
5.7
1N5344A
DO-27
5
8.2
7.79
8.61
1.5
150
200
1
10
6.2
1N5345A
DO-27
5
8.7
8.27
9.14
2
150
200
1
10
6.6
1N5346A
DO-27
5
9.1
8.65
9.56
2
150
150
1
7.5
6.9
1N5347A
DO-27
5
10
9.50
10.50
2
125
125
1
5
7.6
1N5348A
DO-27
5
11
10.45
11.55
2.5
125
125
1
5
8.4
1N5349A
DO-27
5
12
11.40
12.60
2.5
100
125
1
2
9.1
1N5350A
DO-27
5
13
12.35
13.65
2.5
100
100
1
1
9.9
1N5351A
DO-27
5
14
13.30
14.70
2.5
100
75
1
1
10.6
1N5352A
DO-27
5
15
14.25
15.75
2.5
75
75
1
1
11.5
1N5353A
DO-27
5
16
15.20
16.80
2.5
75
75
1
1
12.2
1N5354A
DO-27
5
17
16.15
17.85
2.5
70
75
1
0.5
12.9
Total 1435 < 1...818283...96 > proceed page OK

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