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. 163-1931
Mfr. Part No.1N5384BRLG
HK$1.042
Each (On a Reel of 4000)
units
Single 160V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 8mA 350Ω 500nA - 3.68mm
RS Stock No. 145-2240
Mfr. Part No.BZX85B75-TR
BrandVishay
HK$0.289
Each (On a Reel of 5000)
units
Single 75V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 4mA 135Ω 500nA 4.1mm 2.6mm
RS Stock No. 816-6791
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$1.362
Each (In a Pack of 50)
units
Single 6.2V Surface Mount 1 250 mW SOT-23 Avalanche 3% 3 0.25mA - 100nA 3mm -
RS Stock No. 163-1944
Mfr. Part No.1N5953BRLG
HK$0.944
Each (On a Reel of 6000)
units
Single 150V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 2.5mA 600Ω 250nA - 2.7mm
RS Stock No. 770-5096
Mfr. Part No.DDZ9V1ASF-7
HK$0.406
Each (In a Pack of 100)
units
Single 9.1V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8mm -
RS Stock No. 136-4791
Mfr. Part No.BZX79-C18,133
BrandNexperia
HK$0.17
Each (On a Tape of 10000)
units
Single 18V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 225 Ω @ 1 mA - 4.25mm 1.85mm
RS Stock No. 805-7124
Mfr. Part No.SZMMSZ18T1G
HK$0.768
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.84mm -
RS Stock No. 165-8781
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$0.688
Each (On a Reel of 3000)
units
Single 6.2V Surface Mount 1 250 mW SOT-23 Avalanche 3% 3 0.25mA - 100nA 3mm -
RS Stock No. 166-0306
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$0.156
Each (On a Reel of 10000)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25mm -
RS Stock No. 136-4880
Mfr. Part No.BZX79-C18,133
BrandNexperia
HK$0.351
Each (In a Pack of 100)
units
Single 18V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 225 Ω @ 1 mA - 4.25mm 1.85mm
RS Stock No. 800-8793
Mfr. Part No.1N5384BRLG
HK$2.736
Each (In a Pack of 50)
units
Single 160V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 8mA 350Ω 500nA - 3.68mm
RS Stock No. 751-4562
Mfr. Part No.MMSZ5227B-7-F
HK$0.509
Each (On a Tape of 250)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85mm -
RS Stock No. 654-7527
Mfr. Part No.1N5388BRLG
HK$3.714
Each (In a Pack of 5)
units
Single 200V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89mm -
RS Stock No. 145-5251
Mfr. Part No.SZMMSZ18T1G
HK$0.449
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.84mm -
RS Stock No. 169-0793
Mfr. Part No.DDZ9V1ASF-7
HK$0.149
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8mm -
RS Stock No. 774-3325
Mfr. Part No.1N5388BG
HK$2.527
Each (In a Pack of 10)
units
Single 200V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89mm 3.68mm
RS Stock No. 165-2678
Mfr. Part No.BZX55C6V8-TAP
BrandVishay
HK$0.205
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 -
RS Stock No. 805-0189
Mfr. Part No.1N5245BTR
HK$0.336
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 1.91mm
RS Stock No. 166-1315
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.121
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 -
RS Stock No. 700-2738
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$1.277
Each (In a Pack of 10)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7mm -
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