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. 121-9591
Mfr. Part No.BZT52C7V5-7-F
SGD0.026
Each (On a Reel of 3000)
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Single 7.5V Surface Mount 1 500 mW SOD-123 General Purpose 6% 2 5mA 15Ω 1µA 2.85mm -
RS Stock No. 178-7622
Mfr. Part No.1N4746ATR
SGD0.06
Each (On a Reel of 3000)
units
Single 18V Through Hole 1 1 W DO-41 General Purpose 5% 2 14mA 20Ω 5µA 5.2mm 2.72mm
RS Stock No. 166-1372
Mfr. Part No.BZX384-C22,115
BrandNexperia
SGD0.028
Each (On a Reel of 3000)
units
Single 22V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 55Ω 50nA 1.8mm -
RS Stock No. 816-0469
Mfr. Part No.BZX84J-C3V9,115
BrandNexperia
SGD0.064
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 -
RS Stock No. 148-5699
Mfr. Part No.BZX84C30VLT116
BrandROHM
SGD0.036
Each (In a Pack of 250)
units
Single 32V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±5% 3 2mA 80Ω 100nA 3.1mm -
RS Stock No. 170-4001
Mfr. Part No.BZT52C5V6S RR
SGD0.043
Each (On a Reel of 3000)
units
Single 5.6V Surface Mount 1 200 mW SOD-323F General Purpose 5% 2 5mA 40Ω 900nA 1.8mm -
RS Stock No. 124-6765
Mfr. Part No.PTZTE254.7B
BrandROHM
SGD0.187
Each (In a Pack of 50)
units
Single 4.9V Surface Mount 1 1 W SOD-106 Voltage Regulator - 2 40mA 10Ω 20µA 4.7mm -
RS Stock No. 145-2218
Mfr. Part No.BZX85C36-TAP
BrandVishay
SGD0.047
Each (On a Reel of 5000)
units
Single 36V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 8mA 40Ω 500nA 4.1mm -
RS Stock No. 124-9934
Mfr. Part No.1SMB5938BT3G
SGD0.139
Each (On a Reel of 2500)
units
Single 36V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 10.4mA 38Ω 1µA 4.6mm -
RS Stock No. 184-1014
Mfr. Part No.MMSZ4687T1G
SGD0.05
Each (On a Reel of 3000)
units
Single 4.3V Surface Mount 1 500 mW SOD-123 Voltage Regulator - 2 - - 4µA 2.84mm -
RS Stock No. 169-0674
Mfr. Part No.BZT52C3V9-7-F
SGD0.032
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 90Ω 3µA 2.85mm -
RS Stock No. 182-7491
Mfr. Part No.DZ9F7V5S92-7
SGD0.156
Each (In a Pack of 100)
units
- 7.5V Surface Mount 1 200 mW SOD-923 Ultra Small ±5% 2 5mA 60Ω 500nA 0.8mm -
RS Stock No. 826-7995
Mfr. Part No.UMZC6.8NT106
BrandROHM
SGD0.162
Each (In a Pack of 50)
units
Common Anode 6.8V Surface Mount 2 200 mW SOT-323 (SC-70) General Purpose - 3 5mA - 500nA 2mm -
RS Stock No. 163-2064
Mfr. Part No.BZG03C15G
SGD0.183
Each (On a Reel of 5000)
units
Single 15V Surface Mount 1 - SMA - - 2 50mA - 1µA 4.57mm -
RS Stock No. 169-0678
Mfr. Part No.BZX84C3V6-7-F
SGD0.032
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 90Ω 5µA 3mm -
RS Stock No. 826-7989
Mfr. Part No.UMZ27NT106
BrandROHM
SGD0.286
Each (In a Pack of 40)
units
Common Anode 27V Surface Mount 2 200 mW SOT-323 (SC-70) General Purpose - 3 5mA - 100nA 2mm -
RS Stock No. 171-4795
Mfr. Part No.PDZVTR20B
BrandROHM
SGD0.168
Each (In a Pack of 50)
units
Single 20V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 20mA 14Ω 10µA 3.9mm -
RS Stock No. 184-4124
Mfr. Part No.1N5222B
SGD0.035
Each (In a Bag of 5000)
units
Single 2.5V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30 Ω @ 20 mA, 1250 Ω @ 0.25 mA 100µA - 1.91mm
RS Stock No. 146-9373
Mfr. Part No.BZX84C15VLT116
BrandROHM
SGD0.027
Each (On a Reel of 3000)
units
Single 15.6V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±5% 3 5mA 30Ω 100nA 3.1mm -
RS Stock No. 812-8503
Mfr. Part No.BZT55C9V1-GS08
BrandVishay
SGD0.04
Each (On a Tape of 250)
units
Single 9.1V Surface Mount 1 500 mW SOD-80 Voltage Regulator 6% 2 5mA 10Ω 2µA 3.7mm -
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