Zener Diodes

A Zener diode is a type of semiconductor diode that is different to a normal diode as it allows current to flow from its anode to its cathode in either a forward or reverse direction, but only when exposed to enough voltage. Zener diodes have been designed to work reliably in the breakdown region, unlike normal diodes which would overheat. They are the most common and the handiest solutions to a number of needs in a circuit design.

Zener diodes are designed to change the direction of current flow once the voltage reaches a specific, defined voltage level. This also means that Zener diodes can operate continuously in a breakdown mode. The voltage level that that change a direction of flow is called Zener Voltage or Breakdown Voltage. It could be defined for specific diodes anywhere from 1.8 to 200 V.

Key attributes of a Zener diode are:

• Device configuration including a dual or common anode
• Type of Zener, including avalanche or voltage regulator
• Voltage tolerance
• Voltage drift with temperature
• Impedance (max)

What is a typical application of Zener diodes?
Zener diodes are used in all kinds of electronic equipment and are used to protect circuits from overvoltage and electrostatic discharge or for switching applications. They are one of the basic building blocks of electronic circuits.

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Description Price Diode Configuration Nominal Zener Voltage Mounting Type Number of Elements per Chip Maximum Power Dissipation Package Type Zener Type Zener Voltage Tolerance Pin Count Test Current Maximum Zener Impedance Maximum Reverse Leakage Current Length Width
RS Stock No. 800-8857
Mfr. Part No.1N5948BRLG
HK$2.08
Each (In a Pack of 50)
units
Single 91V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 4.1mA 200Ω 250nA - -
RS Stock No. 921-0871
Mfr. Part No.BZT585B18T-7
HK$0.531
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 225Ω 50nA 1.3mm 0.9mm
RS Stock No. 792-5417
Mfr. Part No.1SMB5917BT3G
HK$2.53
Each (In a Pack of 20)
units
Single 4.7V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 79.8mA 5µA 4.6mm 3.95mm
RS Stock No. 182-7385
Mfr. Part No.GDZ4V3LP3-7
HK$0.633
Each (In a Pack of 250)
units
- 4.3V Surface Mount 1 250 W X3-DFN0603 Ultra Small ±5% 2 5mA - 5µA 0.62mm 0.32mm
RS Stock No. 800-8774
Mfr. Part No.1N5360BRLG
HK$3.05
Each (In a Pack of 50)
units
Single 25V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 50mA 4 Ω, 110 Ω 500nA - -
RS Stock No. 792-0998
Mfr. Part No.BZX585-C2V4,115
BrandNexperia
HK$0.762
Each (On a Reel of 100)
units
Single 2.4V Surface Mount 1 300 mW SOD-523 Voltage Regulator 5% 2 5mA 100Ω 50µA 1.25mm 0.85mm
RS Stock No. 770-5052
Mfr. Part No.DDZ20ASF-7
HK$0.419
Each (In a Pack of 100)
units
Single 18.5V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 10mA 50Ω 70nA 1.8mm 1.35mm
RS Stock No. 186-9354
Mfr. Part No.NSV45035JZT1G
HK$4.295
Each (In a Pack of 25)
units
Single - Surface Mount 1 1.51 W SOT-223 - - 3 + Tab - - - 6.7mm 3.7mm
RS Stock No. 181-7364
Mfr. Part No.BZV55-B27,115
BrandNexperia
HK$0.505
Each (On a Reel of 2500)
units
Single 27.5V Surface Mount 1 500 mW SOD-80C Voltage Regulator ±2% 2 2mA 80Ω 50nA 3.7mm -
RS Stock No. 903-0732
Mfr. Part No.BZT52B5V1-E3-08
BrandVishay
HK$0.881
Each (On a Reel of 250)
units
Single 5.1V Surface Mount 1 500 mW SOD-123 General Purpose 2% 2 1 mA, 5 mA 30Ω 100nA 2.85mm 1.7mm
RS Stock No. 163-1942
Mfr. Part No.1N5948BRLG
HK$0.706
Each (On a Reel of 6000)
units
Single 91V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 4.1mA 200Ω 250nA - -
RS Stock No. 145-3106
Mfr. Part No.MM3Z16VT1G
HK$0.188
Each (On a Reel of 3000)
units
Single 16V Surface Mount 1 200 mW SOD-323 Voltage Regulator 6% 2 5mA 40Ω 50nA 1.7mm 1.25mm
RS Stock No. 146-0838
Mfr. Part No.MMSZ5225BS-7-F
HK$0.476
Each (On a Reel of 3000)
units
Single 3V Surface Mount 1 200 mW SOD-323 Voltage Regulator 5% 2 20mA 30Ω 50µA 1.8mm 1.4mm
RS Stock No. 152-5563
Mfr. Part No.TDZ6V2J,115
BrandNexperia
HK$0.882
Each (In a Pack of 100)
units
Single 6V Surface Mount 1 100 (Peak Reverse Power Dissipation) W, 500 (Total Power Dissipation) mW SC-90, SOD-323F General Purpose - 2 5mA - - 1.8mm 1.35mm
RS Stock No. 816-0469
Mfr. Part No.BZX84J-C3V9,115
BrandNexperia
HK$0.864
Each (In a Pack of 150)
units
Single 3.9V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 3µA 1.8mm 1.35mm
RS Stock No. 263-6645
Mfr. Part No.UDZSTE-174.7B
BrandROHM
HK$1.926
Each (In a Pack of 10)
units
Single 4.7V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 100Ω 2µA 1.7mm 1.25mm
RS Stock No. 163-2518
Mfr. Part No.MMSZ4691T1G
HK$0.282
Each (On a Reel of 3000)
units
Single 6.2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 0.05mA - 10µA 2.69mm 1.6mm
RS Stock No. 103-2975
Mfr. Part No.1SMB5929BT3G
HK$0.762
Each (On a Reel of 2500)
units
Single 15V Surface Mount 1 550 mW SMB Voltage Regulator 5% 2 25mA 1µA 4.32mm 3.56mm
RS Stock No. 166-1337
Mfr. Part No.BZX384-C3V6,115
BrandNexperia
HK$0.325
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 90Ω 5µA 1.8mm 1.35mm
RS Stock No. 146-0564
Mfr. Part No.DDZ18C-7
HK$0.308
Each (On a Reel of 3000)
units
Single 17.9V Surface Mount 1 500 mW SOD-123 General Purpose 2.5% 2 10mA 23Ω 50nA 2.85mm 1.7mm
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