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. 163-0835
Mfr. Part No.1N5369BG
£0.104
Each (In a Box of 1000)
Units
Single 51V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 25mA 230Ω 500nA 8.89mm 3.68mm
RS Stock No. 179-1140
Mfr. Part No.BZV85-C15,113
BrandNexperia
£0.033
Each (On a Reel of 5000)
Units
Single 15V Through Hole 1 1.3 W DO-41 Voltage Regulator ±5% 2 15mA 15Ω 50nA 4.8mm -
RS Stock No. 166-1228
Mfr. Part No.BZV85-C5V1,113
BrandNexperia
£0.035
Each (On a Reel of 5000)
Units
Single 5.1V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 45mA 10Ω 3µA 4.8mm -
RS Stock No. 124-9924
Mfr. Part No.1N5369BRLG
£0.085
Each (On a Reel of 4000)
Units
Single 51V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 25mA 27Ω 500nA 8.89mm -
RS Stock No. 654-7678
Mfr. Part No.1N5369BRLG
£0.336
Each (In a Pack of 5)
Units
Single 51V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 25mA 27Ω 500nA 8.89mm -
RS Stock No. 124-2309
Mfr. Part No.BZX84-C5V1,215
BrandNexperia
£0.014
Each (On a Reel of 3000)
Units
Single 5.1V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 60Ω 2µA 3mm -
RS Stock No. 805-0062
Mfr. Part No.1N4740ATR
£0.055
Each (In a Pack of 100)
Units
Single 10V Through Hole 1 1 W DO-41 General Purpose 5% 2 25mA 10µA 5.2mm 2.72mm
RS Stock No. 436-8221
Mfr. Part No.BZX84-C5V1,215
BrandNexperia
£0.086
Each (In a Pack of 50)
Units
Single 5.1V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 60Ω 2µA 3mm -
RS Stock No. 545-0630
Mfr. Part No.BZX84C5V1LT1G
£0.10
Each
Units
Single 5.1V Surface Mount 1 300 mW SOT-23 Voltage Regulator 6% 3 5mA 60Ω 2µA 2.9mm -
RS Stock No. 170-8035
Mfr. Part No.BZX84-C5V1,235
BrandNexperia
£0.007
Each (On a Reel of 10000)
Units
Single 5V Surface Mount 1 250 mW TO-236 Voltage Regulator ±5% 3 10mA - 2µA 3mm -
RS Stock No. 484-3277
Mfr. Part No.BZV85-C15,113
BrandNexperia
£0.148
Each (In a Pack of 50)
Units
Single 15V Through Hole 1 1.3 W DO-41 Voltage Regulator ±5% 2 15mA 15Ω 50nA 4.8mm -
RS Stock No. 791-6179
Mfr. Part No.MMSZ4679T1G
£0.047
Each (In a Pack of 100)
Units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 0.05mA - 5µA 2.84mm -
RS Stock No. 166-1267
Mfr. Part No.BZX79-B5V1,113
BrandNexperia
£0.017
Each (On a Reel of 10000)
Units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 60Ω 2µA 4.25mm -
RS Stock No. 918-9329
Mfr. Part No.SML4744-E3/61
BrandVishay
£0.139
Each (On a Reel of 1800)
Units
Single 15V Surface Mount 1 1 W SMA Voltage Regulator 10% 2 17mA 14Ω 5µA 4.5mm -
RS Stock No. 162-9443
Mfr. Part No.MMSZ4679T1G
£0.025
Each (On a Reel of 3000)
Units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 0.05mA - 5µA 2.84mm -
RS Stock No. 544-4506
Mfr. Part No.BZX79-C33,113
BrandNexperia
£0.016
Each (In a Pack of 20)
Units
Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25mm -
RS Stock No. 634-7181
Mfr. Part No.SML4744-E3/61
BrandVishay
£0.238
Each (In a Pack of 5)
Units
Single 15V Surface Mount 1 1 W SMA Voltage Regulator 10% 2 17mA 14Ω 5µA 4.5mm -
RS Stock No. 179-1180
Mfr. Part No.BZX79-C33,113
BrandNexperia
£0.014
Each (On a Reel of 10000)
Units
Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25mm -
RS Stock No. 508-359
Mfr. Part No.BZX79-B5V1,113
BrandNexperia
£0.057
Each (In a Pack of 100)
Units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 60Ω 2µA 4.25mm -
RS Stock No. 169-6091
Mfr. Part No.BZT03C24-TAP
BrandVishay
£0.168
Each (On a Tape of 25000)
Units
Single 24V Through Hole 1 3.25 W SOD-57 Transient Suppressor 6% 2 25mA 15Ω 1µA 4mm 3.6mm
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