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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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In Stock onsemi 1, 6.2 V Zener Diode, Single 1 W 5 % Through Hole 2-Pin DO-41 RS Stock No. 184-4699 Mfr. Part No. 1N4735A Subtotal (1 pack of 100 units) PHP559.40(exc. VAT) PHP5.594/unit Quantity	onsemi	Single	-	6.2V	Zener Diode	Through Hole	-	1	-	1W	DO-41	General Purpose	-	2	-	41mA	2Ω	10μA	-65°C	5%	200°C	-	2.72mm	5.2mm	1N47	No	-	-
In Stock onsemi 1, 3.3 V Zener Diode, Single 1 W 5 % Through Hole 2-Pin DO-41 RS Stock No. 805-0034 Mfr. Part No. 1N4728ATR Subtotal (1 pack of 100 units) PHP350.00(exc. VAT) PHP3.50/unit Quantity	onsemi	Single	-	3.3V	Zener Diode	Through Hole	-	1	-	1W	DO-41	General Purpose	-	2	-	76mA	10Ω	100μA	-65°C	5%	200°C	-	2.72mm	5.2mm	1N47	No	-	-
In Stock onsemi 1, 6.2 V Zener Diode, Single 1 W 5 % Through Hole 2-Pin DO-41 RS Stock No. 805-0056 Mfr. Part No. 1N4735ATR Subtotal (1 pack of 200 units) PHP1,020.80(exc. VAT) PHP5.104/unit Quantity	onsemi	Single	-	6.2V	Zener Diode	Through Hole	-	1	-	1W	DO-41	General Purpose	-	2	-	41mA	2Ω	10μA	-65°C	5%	200°C	-	2.72mm	5.2mm	1N47	No	-	-
In Stock onsemi 1, 12 V Zener Diode, Single 5 W 5 % Through Hole 2-Pin DO-15 RS Stock No. 463-278 Mfr. Part No. 1N5349BG Subtotal (1 pack of 10 units) PHP240.03(exc. VAT) PHP24.003/unit Quantity	onsemi	Single	-	12V	Zener Diode	Through Hole	-	1	-	5W	DO-15	Voltage Regulator	-	2	-	100mA	2.5Ω	2μA	-65°C	5%	200°C	-	3.68mm	8.89mm	1N53	No	-	-
In 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 (1 pack of 50 units) PHP707.05(exc. VAT) PHP14.141/unit Quantity	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 (1 pack of 25 units) PHP92.35(exc. VAT) PHP3.694/unit Quantity	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	-	-
Temporarily out of stock Nexperia 1, 16 V Zener Diode, Single 300 mW 5 % Surface 2-Pin UMD RS Stock No. 166-1348 Mfr. Part No. BZX384-C16,115 Subtotal (1 reel of 3000 units) PHP9,600.00(exc. VAT) PHP3.20/unit Quantity	Nexperia	Single	-	16V	Zener Diode	Surface	-	1	-	300mW	UMD	Voltage Regulator	-	2	-	5mA	40Ω	50nA	-65°C	5%	150°C	-	1.1mm	2.7mm	BZX384	No	-	-
Temporarily out of stock ROHM 1, 13 V Zener Diode, Single 250 mW Surface 3-Pin SOT-23 RS Stock No. 222-4232 Mfr. Part No. BZX84C13VLYFHT116 Subtotal (1 reel of 3000 units) PHP14,280.00(exc. VAT) PHP4.76/unit Quantity	ROHM	Single	-	13V	Zener Diode	Surface	-	1	-	250mW	SOT-23	Voltage Regulator	-	3	-	5mA	30Ω	100nA	-	-	150°C	-	1.15mm	3.1mm	BZX84C	RoHS	-	-
Currently unavailable Vishay 1, 18 V Zener Diode, Single 500 mW 5 % Surface 2-Pin MiniMELF RS Stock No. 699-7896 Mfr. Part No. TZMC18-GS08 Subtotal (1 pack of 250 units) PHP731.75(exc. VAT) PHP2.927/unit Quantity	Vishay	Single	-	18V	Zener Diode	Surface	-	1	-	500mW	MiniMELF	Voltage Regulator	-	2	-	5mA	170Ω	2μA	-65°C	5%	175°C	-	-	3.7mm	TZM	No	-	-
Supply shortage onsemi 1, 6.8 V Zener Diode, Single 500 mW 5 % Surface 2-Pin DO-214AC RS Stock No. 163-2343 Mfr. Part No. 1SMA5921BT3G Subtotal (1 reel of 5000 units) PHP33,725.00(exc. VAT) PHP6.745/unit Quantity	onsemi	Single	-	6.8V	Zener Diode	Surface	-	1	-	500mW	DO-214AC	Voltage Regulator	-	2	-	55.1mA	2.5Ω	2.5μA	-65°C	5%	150°C	-	2.2mm	5.59mm	-	RoHS	-	-
Supply shortage onsemi 1, 8.2 V Zener Diode, Single 1.5 W 5 % Surface 2-Pin DO-214AC RS Stock No. 163-1952 Mfr. Part No. 1SMA5923BT3G Subtotal (1 reel of 5000 units) PHP35,145.00(exc. VAT) PHP7.029/unit Quantity	onsemi	Single	-	8.2V	Zener Diode	Surface	-	1	-	1.5W	DO-214AC	Voltage Regulator	-	2	-	45.7mA	400Ω	2.5μA	-65°C	5%	150°C	-	2.2mm	5.59mm	1SMA59xxBT3G	RoHS	-	-
Supply shortage onsemi 1, 7.5 V Zener Diode, Single 3 W 5 % Surface 2-Pin DO-214AA RS Stock No. 178-7567 Mfr. Part No. 1SMB5922BT3G Subtotal (1 reel of 2500 units) PHP17,585.00(exc. VAT) PHP7.034/unit Quantity	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	-	-
Last RS stock Nexperia 1, 39 V Zener Diode, Single 250 mW 2 % Surface 3-Pin SOT-23 RS Stock No. 146-0911 Mfr. Part No. BZX84-B39 Subtotal (1 reel of 3000 units) PHP5,052.00(exc. VAT) PHP1.684/unit Quantity	Nexperia	Single	-	39V	Zener Diode	Surface	-	1	-	250mW	SOT-23	Voltage Regulator	-	3	-	2mA	130Ω	50nA	-65°C	2%	150°C	-	1.1mm	3mm	BZX84	No	-	-
Temporarily out of stock Nexperia 1, 15 V Zener Diode, Single 1 W 5 % Surface 4-Pin UPAK RS Stock No. 484-3182 Mfr. Part No. BZV49-C15,115 Subtotal (1 pack of 5 units) PHP264.88(exc. VAT) PHP52.976/unit Quantity	Nexperia	Single	-	15V	Zener Diode	Surface	-	1	-	1W	UPAK	Voltage Regulator	-	4	-	5mA	30Ω	50nA	-65°C	5%	150°C	-	1.6mm	4.6mm	BZV49	No	-	-
Unavailable onsemi, 20V Zener Diode 5% 200 mW SMT 2-Pin SOD-323F RS Stock No. 806-1817P Mfr. Part No. MM3Z20VC Subtotal 200 units (supplied on a reel) PHP310.80(exc. VAT) PHP1.554/unit Quantity	onsemi	Single	20V	-	-	-	Surface Mount	1	200 mW	-	SOD-323F	-	5%	2	5mA	-	51Ω	45nA	-	-	+150 °C	-	-	-	-	-	-	1.3 x 1.7 x 1mm
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 (1 pack of 10 units) PHP146.87(exc. VAT) PHP14.687/unit Quantity	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	-	-
Supply shortage onsemi 1, 5.6 V Zener Diode, Single 550 mW 5 % Surface 2-Pin DO-214AA RS Stock No. 103-2973 Mfr. Part No. 1SMB5919BT3G Subtotal (1 reel of 2500 units) PHP16,985.00(exc. VAT) PHP6.794/unit Quantity	onsemi	Single	-	5.6V	Zener Diode	Surface	-	1	-	550mW	DO-214AA	Voltage Regulator	-	2	-	66.9mA	2Ω	5μA	-65°C	5%	150°C	-	2.47mm	5.6mm	-	RoHS	-	-
Currently unavailable onsemi 1, 3.3 V Zener Diode, Single 300 mW Surface 3-Pin SOT-23 RS Stock No. 186-8926 Mfr. Part No. SZBZX84C3V3LT1G Subtotal (1 reel of 3000 units) PHP6,270.00(exc. VAT) PHP2.09/unit Quantity	onsemi	Single	-	3.3V	Zener Diode	Surface	-	1	-	300mW	SOT-23	Voltage Regulator	-	3	-	5mA	95Ω	5μA	-65°C	-	150°C	-	1.11mm	3.04mm	SZBZX84	RoHS	-	-
In Stock Nexperia 1, 3.3 V Zener Diode, Single 250 mW 2 % Surface 3-Pin SOT-23 RS Stock No. 792-1036 Mfr. Part No. BZX84-B3V3,215 Subtotal (1 reel of 15 units) PHP71.73(exc. VAT) PHP4.782/unit Quantity	Nexperia	Single	-	3.3V	Zener Diode	Surface	-	1	-	250mW	SOT-23	Voltage Regulator	-	3	-	5mA	95Ω	5μA	-65°C	2%	150°C	-	1.1mm	3mm	BZX84	No	-	-
Unavailable onsemi, 51V Zener Diode 225 mW SMT 3-Pin SOT-23 RS Stock No. 805-2891P Mfr. Part No. SZMMBZ5262BLT1G Subtotal 100 units (supplied on a continuous strip) PHP234.80(exc. VAT) PHP2.348/unit Quantity	onsemi	Single	51V	-	-	-	Surface Mount	1	225 mW	-	SOT-23	Voltage Regulator	-	3	2.5mA	-	125Ω	100nA	-65 °C	-	+150 °C	-	-	-	-	-	-	3.04 x 1.4 x 1.01mm