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)

1N4728A
DO-41G
1
3.3
3.14
3.47
10
76
400
1
100
1
1N4729A
DO-41G
1
3.6
3.42
3.78
10
69
400
1
100
1
1N4730A
DO-41G
1
3.9
3.71
4.10
9
64
400
1
50
1
1N4731A
DO-41G
1
4.3
4.09
4.52
9
58
400
1
10
1
1N4732A
DO-41G
1
4.7
4.47
4.94
8
53
500
1
10
1
1N4733A
DO-41G
1
5.1
4.85
5.36
7
49
550
1
10
1
1N4734A
DO-41G
1
5.6
5.32
5.88
5
45
600
1
10
2
1N4735A
DO-41G
1
6.2
5.89
6.51
2
41
700
1
10
3
1N4736A
DO-41G
1
6.8
6.46
7.14
3.5
37
700
1
10
4
1N4737A
DO-41G
1
7.5
7.13
7.88
4
34
700
0.5
10
5
1N4738A
DO-41G
1
8.2
7.79
8.61
4.5
31
700
0.5
10
6
1N4739A
DO-41G
1
9.1
8.65
9.56
5
28
700
0.5
10
7
1N4740A
DO-41G
1
10
9.50
10.50
7
25
700
0.25
10
7.6
1N4741A
DO-41G
1
11
10.45
11.55
8
23
700
0.25
5
8.4
1N4742A
DO-41G
1
12
11.40
12.60
9
21
700
0.25
5
9.1
Total 1435 < 1...151617...96 > proceed page OK

Nantong JUXIN Semiconductor Co., Ltd.

Contact: Mr.Jacky

Address: No.196, East Qingyu Road‌, Rucheng Street, Rugao-226500, Jiangsu Province, China.

Phone(Wechat): +86-15190885420

Email: info@rectifier-diode.com

 

Anhui JUXIN Semiconductor Co., Ltd.

Address: No.99,Shuanglong Road,Chizhou Economic Technology Development Zone,Anhui Province,China.


Business License
juxin

A high-quality supplier of power semiconductor chips and devices in China