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. 625-6445
Mfr. Part No.1N5333BRLG
HK$3.98
Each (In a Pack of 5)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm 3.68mm
RS Stock No. 170-3469
Mfr. Part No.1N5374BG
HK$1.27
Each (In a Bag of 1000)
units
Single 75V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 20mA 620Ω 500nA 8.89mm -
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
HK$3.89
Each (In a Pack of 5)
units
Single 14V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89mm 3.68mm
RS Stock No. 121-9532
Mfr. Part No.BZT52C2V0-7-F
HK$0.257
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85mm 1.7mm
RS Stock No. 687-8256
Mfr. Part No.MMSZ18T1G
HK$1.669
Each (In a Pack of 25)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69mm 1.6mm
RS Stock No. 634-7030
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$3.458
Each (In a Pack of 5)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6mm 2.9mm
RS Stock No. 145-2219
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$0.479
Each (On a Reel of 5000)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1mm 2.6mm
RS Stock No. 805-0189
Mfr. Part No.1N5245BTR
HK$0.379
Each (In a Pack of 200)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16Ω 100nA 4.56mm -
RS Stock No. 166-1315
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.176
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 15Ω 2µA 3mm 1.4mm
RS Stock No. 625-6495
Mfr. Part No.1N5374BRLG
HK$4.09
Each (In a Pack of 5)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89mm 3.68mm
RS Stock No. 811-5967
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.573
Each (In a Pack of 250)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 3.9mm -
RS Stock No. 103-3897
Mfr. Part No.1N5333BRLG
HK$1.04
Each (On a Reel of 4000)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm 3.68mm
RS Stock No. 751-3711
Mfr. Part No.BZT52C2V0-7-F
HK$0.488
Each (On a Tape of 250)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85mm 1.7mm
RS Stock No. 166-1238
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.18
Each (On a Reel of 5000)
units
Single 68V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 240Ω 50nA 4.25mm 1.85mm
RS Stock No. 169-8636
Mfr. Part No.1N4745ATR
HK$0.342
Each (On a Reel of 3000)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 5.2mm -
RS Stock No. 165-2678
Mfr. Part No.BZX55C6V8-TAP
BrandVishay
HK$0.221
Each (On a Reel of 10000)
units
Single 6.8V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 100nA 3.9mm 1.7mm
RS Stock No. 813-3757
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$2.58
Each (On a Tape of 50)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 5.2mm -
RS Stock No. 145-4102
Mfr. Part No.MMSZ18T1G
HK$0.282
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69mm 1.6mm
RS Stock No. 159-6363
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.214
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 3.9mm -
RS Stock No. 165-9970
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.344
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8mm 1.35mm
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