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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Beskrivning Pris 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-artikelnummer 508-103
Tillv. art.nrBZX384-C3V3,115
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Single 12V Surface Mount 1 1 W MELF General Purpose 5% 2 50mA 500nA 5.2mm 2.6mm
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Single 3.6V Surface Mount 1 300 mW SOT-23 Voltage Regulator 6% 3 5mA 90Ω 5µA 2.9mm -
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Tillv. art.nrMMSZ5248B-7-F
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Single 18V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 7mA 21Ω 100nA 2.85mm -
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Single 3.3V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 500Ω 5µA 1.3mm -
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Tillv. art.nrDFLZ12-7
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Single 12V Surface Mount 1 1 W POWERDI123 General Purpose 5% 2 50mA 3µA 3mm -
RS-artikelnummer 122-1223
Tillv. art.nrSMAZ15-13-F
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Single 15V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 50mA 10Ω 1µA 4.6mm -
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Tillv. art.nrBZX85C56-TR
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Single 56V Through Hole 1 1.3 W DO-41 General Purpose 7% 2 4mA 120Ω 500nA 4.1mm 2.6mm
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Tillv. art.nrBZX85C10 R0
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Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 500nA 4.25mm 2.6mm
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Tillv. art.nrBZX55C8V2-TAP
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Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 100nA 3.9mm -
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Tillv. art.nrDFLZ12-7
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Single 12V Surface Mount 1 1 W POWERDI123 General Purpose 5% 2 50mA 3µA 3mm -
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Tillv. art.nr1N4746A R0
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Single 18V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 14mA 20Ω 5µA 5.2mm -
RS-artikelnummer 484-3182
Tillv. art.nrBZV49-C15,115
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Single 15V Surface Mount 1 1 W UPAK Voltage Regulator 5% 4 5mA 30Ω 50nA 4.6mm -
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Single 9.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 10Ω 3µA 3.9mm 1.7mm
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Tillv. art.nrZ1SMA33 TRTB
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Single 56V Through Hole 1 1.3 W DO-41 General Purpose 7% 2 4mA 120Ω 500nA 4.1mm 2.6mm
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Single 7.5V Surface Mount 1 250 mW SOT-23 Voltage Regulator 2% 3 5mA - 1µA 3mm -
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Single 18V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 14mA 20Ω 5µA 5.2mm -
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Single 15V Through Hole 1 1 W DO-41 - 5% 2 15mA 15Ω 500nA 5.21mm -
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