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 Dimensions Automotive Standard
RS Stock No. 163-2332
Mfr. Part No.1N5374BRLG
HK$1.22
Each (On a Reel of 4000)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 805-0081
Mfr. Part No.1N4745ATR
HK$0.657
Each (In a Pack of 100)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 774-3293
Mfr. Part No.1N5351BG
HK$3.111
Each (In a Pack of 10)
units
Single 14V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 100mA 75Ω 1µA 3.68 (Dia.) x 8.89mm -
RS Stock No. 166-1238
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.207
Each (On a Reel of 5000)
units
Single 68V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 240Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 121-9532
Mfr. Part No.BZT52C2V0-7-F
HK$0.296
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85 x 1.7 x 1.35mm -
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 - -
RS Stock No. 625-6445
Mfr. Part No.1N5333BRLG
HK$4.046
Each (In a Pack of 5)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 103-5131
Mfr. Part No.1N5351BG
HK$1.386
Each (In a Box of 1000)
units
Single 14V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 100mA 75Ω 1µA 3.68 (Dia.) x 8.89mm -
RS Stock No. 184-4137
Mfr. Part No.1N5245B
HK$0.223
Each (In a Bag of 5000)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA 1.91 Dia. x 4.56mm -
RS Stock No. 186-9308
Mfr. Part No.1N5366BG
HK$3.049
Each (In a Pack of 25)
units
Single 39V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 30mA 170Ω 500nA 3.68 Dia. x 8.89mm -
RS Stock No. 687-8174
Mfr. Part No.BZX84B5V1LT1G
HK$1.288
Each (In a Pack of 25)
units
Single 5.1V Surface Mount 1 300 mW SOT-23 Voltage Regulator 2% 3 5mA 60Ω 2µA 2.9 x 1.3 x 0.94mm -
RS Stock No. 103-3897
Mfr. Part No.1N5333BRLG
HK$1.256
Each (On a Reel of 4000)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 816-0453
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.714
Each (In a Pack of 150)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8 x 1.35 x 0.8mm -
RS Stock No. 509-548
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.414
Each (In a Pack of 200)
units
Single 6.8V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 15Ω 2µA 3 x 1.4 x 1mm -
RS Stock No. 100-9507
Mfr. Part No.1N5333BG
HK$1.315
Each (In a Box of 1000)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 169-8636
Mfr. Part No.1N4745ATR
HK$0.393
Each (On a Reel of 3000)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 811-5961
Mfr. Part No.1N5232B-TR
BrandVishay
HK$0.582
Each (In a Pack of 250)
units
Single 5.6V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 11Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 145-2219
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$0.551
Each (On a Reel of 5000)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1 x 2.6 x 2.6mm -
RS Stock No. 476-0217
Mfr. Part No.UDZSTE-17 7.5B
BrandROHM
HK$0.926
Each (In a Pack of 100)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 509-144
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.414
Each (In a Pack of 100)
units
Single 68V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 240Ω 50nA 4.25 x 1.85 x 1.85mm -
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