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Zener Diodes

Zener diodes are a type of semiconductor device that has different characteristics from a normal diode. Zener diodes allow current to flow from its anode to its cathode in either a forward or reverse direction, but only when exposed to enough voltage.

How does a Zener diode work?

Zener diodes are designed to change the direction of the 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 changes the direction of flow is called Zener Voltage or Breakdown Voltage. It could be defined for specific diodes anywhere from 1.8 to 200 V.

Types of Zener diodes

Zener diodes are offered in an array of different configurations such as different levels of power dissipation, mount types, and different configurations.

There are also different types of Zener diodes such as:

Avalanche
Bi-Directional
ESD Protection
General Purpose
Ultra-small

Typical applications 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. Zener diodes work reliably in the breakdown region, unlike normal diodes which would overheat. They are the most common and handiest solutions to a number of needs in a circuit design.

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Last RS stock Taiwan Semiconductor 1, 33 V Zener Diode, Single 1 W 5 % Through Hole 2-Pin DO-41 RS Stock No. 687-5484 Mfr. Part No. 1N4752A Subtotal (50 units, in packs of 50) PHP707.05(exc. VAT) PHP14.141/unit Pack(s)	Taiwan Semiconductor	Single	-	33V	Zener Diode	Through Hole	-	1	-	1W	DO-41	Voltage Regulator	-	2	-	7.5mA	45Ω	5μA	-65°C	5%	200°C	-	2.7mm	5.2mm	1N4752A	No	-	-
In Stock onsemi 1, 3.3 V Zener Diode, Single 500 mW 5 % Surface 2-Pin SOD-123 RS Stock No. 687-8250 Mfr. Part No. MMSZ4684T1G Subtotal (25 units, in packs of 25) PHP92.35(exc. VAT) PHP3.694/unit Pack(s)	onsemi	Single	-	3.3V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Voltage Regulator	-	2	-	0.05mA	-	7.5μA	-55°C	5%	150°C	-	1.35mm	2.84mm	MMS	No	-	-
Supply shortage onsemi 1, 24 V Zener Diode, Single 3 W 5 % Surface 2-Pin DO-214AA RS Stock No. 687-8161 Mfr. Part No. 1SMB5934BT3G Subtotal (10 units, in packs of 10) PHP146.87(exc. VAT) PHP14.687/unit Pack(s)	onsemi	Single	-	24V	Zener Diode	Surface	-	1	-	3W	DO-214AA	Voltage Regulator	-	2	-	15.6mA	19Ω	1μA	-65°C	5%	150°C	-	2.47mm	5.6mm	-	RoHS	-	-
In Stock onsemi 1, 3.6 V Voltage Regulator, Single Zener Diode 500 mW 5 % Surface 2-Pin SOD-323 RS Stock No. 765-286P Mfr. Part No. MM3Z3V6T1G Subtotal (200 units, supplied on a reel) PHP415.80(exc. VAT) PHP2.079/unit Units	onsemi	Single Zener Diode	-	3.6V	Voltage Regulator	Surface	-	1	-	500mW	SOD-323	Surface Mount	-	2	-	5mA	90Ω	5μA	-65°C	5%	150°C	-	0.9mm	2.55mm	MM3Z	RoHS Compliant	1.25mm	-
Limited stock onsemi 1, 7.5 V Zener Diode, Single 3 W 5 % Surface 2-Pin DO-214AA RS Stock No. 864-7799 Mfr. Part No. 1SMB5922BT3G Subtotal (50 units, in packs of 50) PHP738.95(exc. VAT) PHP14.779/unit Pack(s)	onsemi	Single	-	7.5V	Zener Diode	Surface	-	1	-	3W	DO-214AA	Voltage Regulator	-	2	-	50mA	400Ω	5μA	-65°C	5%	150°C	-	2.47mm	5.6mm	-	No	-	-
In Stock ROHM 1, 3.6 V Zener Diode, Single 250 mW Surface 3-Pin SOT-23 RS Stock No. 222-4301 Mfr. Part No. BZX84C3V6LYT116 Subtotal (200 units, in packs of 200) PHP1,248.60(exc. VAT) PHP6.243/unit Pack(s)	ROHM	Single	-	3.6V	Zener Diode	Surface	-	1	-	250mW	SOT-23	Voltage Regulator	-	3	-	5mA	90Ω	5μA	-	-	150°C	-	1.15mm	3.1mm	BZX84C	RoHS	-	-
In Stock onsemi 1, 3.6 V Zener Diode, Single 500 mW 5 % Surface 2-Pin SOD-123 RS Stock No. 545-2995P Mfr. Part No. MMSZ5227BT1G Subtotal (20 units, supplied on a continuous strip) PHP75.46(exc. VAT) PHP3.773/unit Units	onsemi	Single	-	3.6V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Voltage Regulator	-	2	-	20mA	24Ω	15μA	-55°C	5%	150°C	-	1.35mm	3.86mm	-	RoHS	-	-
In Stock onsemi 1, 3.6 V Zener Diode, Single 500 mW 5 % Surface 2-Pin SOD-123 RS Stock No. 163-2522 Mfr. Part No. MMSZ5227BT1G Subtotal (3000 units, on reels of 3000) PHP5,586.00(exc. VAT) PHP1.862/unit Reel(s)	onsemi	Single	-	3.6V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Voltage Regulator	-	2	-	20mA	24Ω	15μA	-55°C	5%	150°C	-	1.35mm	3.86mm	-	RoHS	-	-
In Stock onsemi 1, 2.4 V Zener Diode, Single 200 mW 2 % Surface 2-Pin SOD-323F RS Stock No. 806-1820 Mfr. Part No. MM3Z2V4B Subtotal (200 units, on tapes of 200) PHP1,014.60(exc. VAT) PHP5.073/unit Tape(s)	onsemi	Single	-	2.4V	Zener Diode	Surface	-	1	-	200mW	SOD-323F	-	-	2	-	5mA	94Ω	45μA	65°C	2%	150°C	-	1mm	2.7mm	MM3Z	No	-	-
In Stock ROHM 1, 35 V Zener Diode, Single 1 W 5.71 % Surface 2-Pin DO-214AA (SMB) RS Stock No. 265-453P Mfr. Part No. PBZTBR133B Subtotal (25 units, supplied on a continuous strip) PHP842.50(exc. VAT) PHP33.70/unit Units	ROHM	Single	-	35V	Zener Diode	Surface	-	1	-	1W	DO-214AA (SMB)	Voltage Regulator	-	2	-	1mA	-	-	-55°C	5.71%	150°C	-	-	-	PBZ	No	-	-
Last RS stock Vishay 1, 3.9 V Zener Diode, Single 200 mW 5 % Surface 2-Pin SOD-323 RS Stock No. 233-0851 Mfr. Part No. BZX384C3V9-HG3-08 Subtotal (3000 units, on reels of 3000) PHP14,910.00(exc. VAT) PHP4.97/unit Reel(s)	Vishay	Single	-	3.9V	Zener Diode	Surface	-	1	-	200mW	SOD-323	Small Signal	-	2	-	5mA	-	3μA	-55°C	5%	150°C	-	1.15mm	1.95mm	BZX384	RoHS	-	-
Last RS stock Vishay 1, 3.9 V Zener Diode, Single 200 mW 5 % Surface 2-Pin SOD-323 RS Stock No. 233-0852 Mfr. Part No. BZX384C3V9-HG3-08 Subtotal (1 unit) PHP12.87(exc. VAT) PHP12.87/unit Units	Vishay	Single	-	3.9V	Zener Diode	Surface	-	1	-	200mW	SOD-323	Small Signal	-	2	-	5mA	-	3μA	-55°C	5%	150°C	-	1.15mm	1.95mm	BZX384	RoHS	-	-
Last RS stock Vishay 1, 3.9 V Zener Diode, Single 200 mW 5 % Surface 2-Pin SOD-323 RS Stock No. 233-0852P Mfr. Part No. BZX384C3V9-HG3-08 Subtotal (1 unit, supplied on a continuous strip) PHP12.87(exc. VAT) PHP12.87/unit Units	Vishay	Single	-	3.9V	Zener Diode	Surface	-	1	-	200mW	SOD-323	Small Signal	-	2	-	5mA	-	3μA	-55°C	5%	150°C	-	1.15mm	1.95mm	BZX384	RoHS	-	-
In Stock onsemi 1, 15 V Zener Diode, Single 550 mW 5 % Surface 2-Pin DO-214AA RS Stock No. 546-1567 Mfr. Part No. 1SMB5929BT3G Subtotal (25 units, in packs of 25) PHP286.00(exc. VAT) PHP11.44/unit Pack(s)	onsemi	Single	-	15V	Zener Diode	Surface	-	1	-	550mW	DO-214AA	Voltage Regulator	-	2	-	25mA	9Ω	1μA	-65°C	5%	150°C	-	2.47mm	5.6mm	1SMB59	RoHS	-	-
In Stock onsemi 1, 3.6 V Zener Diode, Single 225 mW 5 % Surface 3-Pin SOT-23 RS Stock No. 145-3035 Mfr. Part No. MMBZ5227BLT1G Subtotal (3000 units, on reels of 3000) PHP4,980.00(exc. VAT) PHP1.66/unit Reel(s)	onsemi	Single	-	3.6V	Zener Diode	Surface	-	1	-	225mW	SOT-23	Voltage Regulator	-	3	-	20mA	24Ω	15μA	-65°C	5%	150°C	-	1.11mm	3.04mm	MMBZ52xxBLT1G	RoHS	-	-
In Stock Vishay 1, 6.51 V Zener Diode, Single 500 mW 0.05 % Surface 2-Pin SOD-123 RS Stock No. 100-059P Mfr. Part No. BZT52C6V2-E3-08 Subtotal (200 units, supplied on a reel) PHP1,146.60(exc. VAT) PHP5.733/unit Units	Vishay	Single	-	6.51V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Silicon Planar	-	2	-	-	10Ω	-	-55°C	0.05%	150°C	-	1.17mm	3.7mm	BZT	RoHS Compliant	-	-
In Stock Vishay 1, 6.51 V Zener Diode, Single 500 mW 0.05 % Surface 2-Pin SOD-123 RS Stock No. 100-059 Mfr. Part No. BZT52C6V2-E3-08 Subtotal (200 units, on tapes of 200) PHP1,146.60(exc. VAT) PHP5.733/unit Tape(s)	Vishay	Single	-	6.51V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Silicon Planar	-	2	-	-	10Ω	-	-55°C	0.05%	150°C	-	1.17mm	3.7mm	BZT	RoHS Compliant	-	-
In Stock onsemi 1, 3.9 V Zener Diode, Single 500 mW 5 % Surface 2-Pin SOD-123 RS Stock No. 793-0860 Mfr. Part No. MMSZ4686T1G Subtotal (100 units, in packs of 100) PHP349.00(exc. VAT) PHP3.49/unit Pack(s)	onsemi	Single	-	3.9V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Voltage Regulator	-	2	-	0.05mA	-	5μA	-55°C	5%	150°C	-	1.35mm	3.86mm	-	No	-	-
In Stock onsemi 1, 200 V Zener Diode, Single 550 mW 5 % Surface 2-Pin DO-214AA RS Stock No. 163-2347 Mfr. Part No. 1SMB5956BT3G Subtotal (2500 units, on reels of 2500) PHP17,942.50(exc. VAT) PHP7.177/unit Reel(s)	onsemi	Single	-	200V	Zener Diode	Surface	-	1	-	550mW	DO-214AA	Voltage Regulator	-	2	-	1.9mA	1200Ω	1μA	-65°C	5%	150°C	-	2.47mm	5.6mm	-	RoHS	-	-
In Stock onsemi 1, 2.4 V Zener Diode, Single 500 mW 5 % Surface 2-Pin SOD-123 RS Stock No. 802-1825 Mfr. Part No. MMSZ2V4T1G Subtotal (200 units, on tapes of 200) PHP532.00(exc. VAT) PHP2.66/unit Tape(s)	onsemi	Single	-	2.4V	Zener Diode	Surface	-	1	-	500mW	SOD-123	Voltage Regulator	-	2	-	5mA	100Ω	50μA	-55°C	5%	150°C	-	1.35mm	3.68mm	MMSZxxxT1G	RoHS	-	-