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 Diameter
RS Stock No. 151-2759
Mfr. Part No.BZX384-B24,115
BrandNexperia
SGD0.044
Each (In a Pack of 250)
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Single 24V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 300 (Total Power Dissipation) mW SC-76, SOD-323 Voltage Regulator ±2% 2 5mA - - 1.8mm -
RS Stock No. 159-6494
Mfr. Part No.BZX55C2V7-TAP
BrandVishay
SGD0.033
Each (On a Reel of 10000)
units
Single 2.7V Through Hole 1 500 mW DO-35 Voltage Regulator 7% 2 5mA 85Ω 10µA 3.9mm -
RS Stock No. 805-7102
Mfr. Part No.SZMMSZ5252BT1G
SGD0.152
Each (In a Pack of 100)
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Single 24V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5.2mA 33Ω 100nA 2.84mm -
RS Stock No. 710-4266
Mfr. Part No.BZX84C8V2-E3-08
BrandVishay
SGD0.057
Each (In a Pack of 100)
units
Single 8.2V Surface Mount 1 300 mW SOT-23 - 5% 3 5mA 15Ω 700nA 3.1mm -
RS Stock No. 816-0425
Mfr. Part No.BZX84J-B4V7,115
BrandNexperia
SGD0.046
Each (In a Pack of 150)
units
Single 4.7V Surface Mount 1 550 mW SOD-323F General Purpose 2% 2 5mA - 3µA 1.8mm -
RS Stock No. 163-0811
Mfr. Part No.SZMM3Z4V7T1G
SGD0.059
Each (On a Reel of 3000)
units
Single 4.7V Surface Mount 1 300 mW SOD-323 Voltage Regulator 5% 2 5mA 80Ω 3µA 1.8mm -
RS Stock No. 796-5452
Mfr. Part No.BZT52C16 RH
SGD0.072
Each (In a Pack of 250)
units
Single 16V Surface Mount 1 500 mW SOD-123F General Purpose 5% 2 5mA 40Ω 45nA 2.7mm -
RS Stock No. 699-7751
Mfr. Part No.BZM55C5V1-TR
BrandVishay
SGD0.103
Each (In a Pack of 100)
units
Single 5.1V Surface Mount 1 500 mW MicroMELF Voltage Regulator 6% 2 5mA 550Ω 2µA 2mm 1.2mm
RS Stock No. 170-3469
Mfr. Part No.1N5374BG
SGD0.218
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 3.68mm
RS Stock No. 171-5314
Mfr. Part No.TFZVTR8.2B
BrandROHM
SGD0.046
Each (On a Reel of 3000)
units
Single 7.78V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 20mA 500nA 2.1mm -
RS Stock No. 145-2011
Mfr. Part No.ZM4737A-GS08
BrandVishay
SGD0.124
Each (On a Reel of 1500)
units
Single 7.5V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 34mA 10µA 5.2mm 2.6mm
RS Stock No. 818-5027
Mfr. Part No.TZX36A-TAP
BrandVishay
SGD0.056
Each (In a Pack of 200)
units
Single 36V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 2mA 140Ω 1µA 3.9mm 1.7mm
RS Stock No. 103-7560
Mfr. Part No.BZV55-C5V6,115
BrandNexperia
SGD0.028
Each (On a Reel of 2500)
units
Single 5.6V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 40Ω 1µA 3.7mm -
RS Stock No. 133-2956
Mfr. Part No.VDZT2R12B
BrandROHM
SGD0.10
Each (In a Pack of 100)
units
Single 12V Surface Mount 1 100 mW SOD-723 Voltage Regulator - 2 - 30Ω 100nA 1mm -
RS Stock No. 181-7377
Mfr. Part No.BZX79-C3V6,113
BrandNexperia
SGD0.037
Each (On a Reel of 10000)
units
Single 3.8V PCB Mount 1 500 mW SOD-27 Voltage Regulator ±5% 2 5mA 90Ω 5µA 4.25mm 1.85mm
RS Stock No. 710-4297
Mfr. Part No.MMSZ5242B-G3-08
BrandVishay
SGD0.083
Each (In a Pack of 100)
units
Single 12V Surface Mount 1 500 mW SOD-123 - 5% 2 20mA 30Ω 1µA 2.85mm -
RS Stock No. 807-9906
Mfr. Part No.1SMB5936BT3G
SGD0.189
Each (In a Pack of 100)
units
Single 30V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 12.5mA 28Ω 1µA 4.6mm -
RS Stock No. 177-7888
Mfr. Part No.KDZVTR15B
BrandROHM
SGD0.135
Each (On a Reel of 3000)
units
Single 15V Surface Mount 1 1 W SOD-123FL Voltage Regulator - 2 - - 10µA 2.7mm -
RS Stock No. 760-2874
Mfr. Part No.DZ2451000L
BrandPanasonic
SGD0.589
Each (In a Pack of 10)
units
Single 51V Surface Mount 1 2 W TMiniP2 F2 B Voltage Regulator 5% 2 5mA 65Ω 10µA 3.8mm -
RS Stock No. 163-2519
Mfr. Part No.MMSZ4696T1G
SGD0.047
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 3% 2 0.05mA - 1µA 2.69mm -
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