1SMA4743HR3G

The 1SMA4743HR3G is a Zener single diode specifically designed to provide over-voltage protection against surges in regulated power supplies. It is a two-terminal, high voltage diode that is ideal for use in circuit designs requiring extremely low voltage drops. It is also known for its ability to dissipate high power levels, as well as for its high thermal stability. In addition, it provides low forward voltage drop and offers fast response time in the event of an overvoltage or surge condition.The 1SMA4743HR3G is a single-terminal Zener diode which is suitable for applications requiring ultra-high voltage protection, such as secondary side over-voltage protection and regulation of voltage gradients. It is capable of withstanding both low and high-voltage transient surges of up to 600V. The device has a maximum reverse breakdown voltage of up to 43.5V with a power dissipation rating of 500mW. The diode also features a current-limiting capability of up to 1A.The 1SMA4743HR3G works on the same principle as other Zener diodes, which are voltage-regulated devices. They are composed of reverse-biased PIN junctions and have a reverse breakdown voltage at which the current across the diode starts increasing rapidly with a small increase in the applied voltage. When the reverse voltage exceeds the breakdown voltage, the diode breaks down and a large current flows through it. As a result, it acts as a short circuit, diverting current from the circuit and protecting it from overvoltage.The 1SMA4743HR3G diode is composed of a heavily doped N-type semiconductor layer and an undoped P-type layer. The N-type layer is constructed with highly doped negative materials to reduce its resistance, while the P-type layer is constructed with undoped material to raise its resistance. The reverse bias current flows through the device due to the injection of minority carriers in the N-type junction. At the same time, when the voltage exceeds the reverse breakdown voltage, the current due to avalanche multiplication of the majority carriers in the P-type junction increases rapidly, resulting in the device breakdown.The 1SMA4743HR3G is available as a surface-mount package and is compatible with automated assembly machines. Its low profile design also makes it suitable for applications where minimum space is required. In addition, it has a high surge, low reverse voltage drop and excellent thermal stability, making it an ideal choice for protecting sensitive circuits from overvoltage and surges.In conclusion, the 1SMA4743HR3G is an ideal overvoltage protection device for applications requiring very low voltage drops and high thermal stability. It is designed with a single terminal and features fast response time in event of an overvoltage or surge condition. Its low package profile and compatibility with automated assembly machines make it a suitable choice for space-constrained applications.

1SMA4742-GT3TR	SMC Diode So...	0.04 $	1000	DIODE ZENER 12V 1W SMAZen...
1SMA5952 M2G	Taiwan Semic...	0.04 $	1000	DIODE ZENER 130V 1.5W DO2...
1SMA4740 R3G	Taiwan Semic...	--	1000	DIODE ZENER 10V 1.25W DO2...
1SMA4760 R3G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 68V 1.25W DO2...
1SMA5945 R3G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 68V 1.5W DO21...
1SMA4757HR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 51V 1.25W DO2...
1SMA4738 R3G	Taiwan Semic...	0.06 $	7200	DIODE ZENER 8.2V 1.25W DO...
1SMA54AT3G	Littelfuse I...	--	1000	TVS DIODE 54V 87.1V SMA
1SMA5943HM2G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 56V 1.5W DO21...
1SMA5940 R3G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 43V 1.5W DO21...
1SMA4741HR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 11V 1.25W DO2...
1SMA150ZHR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 150V 1.25W DO...
1SMA5929 R3G	Taiwan Semic...	0.06 $	1800	DIODE ZENER 15V 1.5W DO21...
1SMA4747-GT3TR	SMC Diode So...	0.04 $	1000	DIODE ZENER 20V 1W SMAZen...
1SMA30AT3	ON Semicondu...	--	1000	TVS DIODE 30V 48.4V SMA
1SMA5942 M2G	Taiwan Semic...	0.04 $	1000	DIODE ZENER 51V 1.5W DO21...
1SMA5949HM2G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 100V 1.5W DO2...
1SMA5920BT3	ON Semicondu...	--	1000	DIODE ZENER 6.2V 1.5W SMA...
1SMA180Z M2G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 180V 1.25W DO...
1SMA5933BT3G	ON Semicondu...	--	5000	DIODE ZENER 22V 1.5W SMAZ...
1SMA17AT3G	Littelfuse I...	--	1000	TVS DIODE 17V 27.6V SMA
1SMA64AT3G	ON Semicondu...	0.08 $	1000	TVS DIODE 64V 103V SMA
1SMA4755 R3G	Taiwan Semic...	0.06 $	3600	DIODE ZENER 43V 1.25W DO2...
1SMA5935HM2G	Taiwan Semic...	0.05 $	1000	DIODE ZENER 27V 1.5W DO21...
1SMA5932HR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 20V 1.5W DO21...
1SMA5916BT3G	ON Semicondu...	--	1000	DIODE ZENER 4.3V 1.5W SMA...
1SMA130Z M2G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 130V 1.25W DO...
1SMA4753-GT3TR	SMC Diode So...	0.04 $	1000	DIODE ZENER 36V 1W SMAZen...
1SMA4743HR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 13V 1.25W DO2...
1SMA13CAT3	ON Semicondu...	0.19 $	1000	TVS DIODE 13V 21.5V SMA
1SMA5930BT3G	ON Semicondu...	--	1000	DIODE ZENER 16V 1.5W SMAZ...
1SMA26CAT3G	Littelfuse I...	--	1000	TVS DIODE 26V 42.1V SMA
1SMA13AT3G	Littelfuse I...	--	1000	TVS DIODE 13V 21.5V SMA
1SMA4752-GT3TR	SMC Diode So...	0.04 $	1000	DIODE ZENER 33V 1W SMAZen...
1SMA5942BT3G	ON Semicondu...	--	10000	DIODE ZENER 51V 1.5W SMAZ...
1SMA33CAT3G	Littelfuse I...	--	1000	TVS DIODE 33V 53.3V SMA
1SMA5932BT3G	ON Semicondu...	--	5000	DIODE ZENER 20V 1.5W SMAZ...
1SMA4752 M2G	Taiwan Semic...	0.04 $	1000	DIODE ZENER 33V 1.25W DO2...
1SMA5939 M2G	Taiwan Semic...	0.04 $	1000	DIODE ZENER 39V 1.5W DO21...
1SMA5939HR3G	Taiwan Semic...	0.06 $	1000	DIODE ZENER 39V 1.5W DO21...