{"product_id":"tip122-npn-darlington-transistor","title":"TIP122 NPN Darlington transistor in Pakistan","description":"\u003ch3\u003eAbout TIP122:\u003c\/h3\u003e\n\u003cp\u003eThe TIP122 NPN Darlington transistor is a Darlington pair NPN transistor. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about 1000. It can also withstand about 100V across its collector- Emitter hence can be used to drive heavy loads. The Darlington pair inside this transistor is shown clearly as its internal circuit schematic below\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/TIP122-Darlington-NPN-Transistor-internal-connection-circuit.png?v=1789233568\" alt=\" TIP122 Darlington NPN Transistor internal connection circuit\" data-entity-type=\"file\" data-entity-uuid=\"bb7d1007-7ba3-4242-b154-4061686bf03f\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003cp\u003eAs you can see, there are two transistors inside this TO-220 package in which the emitter of the first transistor is connected with the base of the second transistor and the collector of both transistors are connected together to form a Darlington pair. This increases the current gain and current rating of this transistor.\u003c\/p\u003e\n\u003ch3\u003ePin Configuration:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003ctd\u003eControls the biasing of transistor, Used to turn ON or OFF the transistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eCollector\u003c\/td\u003e\n\u003ctd\u003eCurrent flows in through collector, normally connected to load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eEmitter\u003c\/td\u003e\n\u003ctd\u003eCurrent Drains out through emitter, normally connected to ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eFeatures of TIP122 NPN Darlington transistor:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDarlington Medium-power NPN Transistor\u003c\/li\u003e\n\u003cli\u003eHigh DC Current Gain (hFE), typically 1000\u003c\/li\u003e\n\u003cli\u003eContinuous Collector current (IC) is 5A\u003c\/li\u003e\n\u003cli\u003eCollector-Emitter voltage (VCE) is 100 V\u003c\/li\u003e\n\u003cli\u003eCollector-Base voltage (VCB) is 100V\u003c\/li\u003e\n\u003cli\u003eEmitter Base Voltage (VBE) is 5V\u003c\/li\u003e\n\u003cli\u003eBase Current(IB) is 120mA\u003c\/li\u003e\n\u003cli\u003eAvailable in To-220 Package\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eWhere to TIP122:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eThis transistor is known for its high current gain (hfe = 1000) and high collector current (IC =5A) hence it is normally use to control loads with high current or in applications where high amplification is require. This transistor has a low Base-Emitter Voltage of the only 5V hence can  easily control by a Logic device like microcontrollers. Although care has to be taken to check if the logic device can source up to 120mA.\u003c\/p\u003e\n\u003cp\u003eSo, if you looking for a transistor that could be easily controlled by a Logic device to switch high power loads or to amplify high current then this Transistor might be an ideal choice for your application.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eHow to use TIP122:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eAlthough TIP has high collector current and current gain, it is fairly simple to control the device since it has an Emitter-Base voltage (VBE) of only 5V and base current of only 120mA. In the below circuit I have used the TIP122 to control a 48V motor which has a continuous current of about 3A.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/Circuit-using-TIP122-Darlington-NPN-Transistor.png?v=1789233570\" alt=\"Circuit using TIP122 Darlington NPN Transistor  \" data-entity-type=\"file\" data-entity-uuid=\"2c1cf23c-b9ba-483e-aa39-311306c54112\" loading=\"lazy\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eApplications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCan use to switch high current (upto 5A) loads\u003c\/li\u003e\n\u003cli\u003eCan use as medium Power switches\u003c\/li\u003e\n\u003cli\u003eUse where high amplification is needed\u003c\/li\u003e\n\u003cli\u003eSpeed control of Motors\u003c\/li\u003e\n\u003cli\u003eInverter and other rectifier circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e2D-Model\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e2D dimensions will help you in placing this component at the time of making circuit on perf board or a PCB.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/TIP122-Darlington-NPN-Transistor-2D-model.png?v=1789233573\" alt=\" TIP122 Darlington NPN Transistor 2D model\" data-entity-type=\"file\" data-entity-uuid=\"f2ae2dc5-c31c-435a-8878-3bcdc3d09522\" loading=\"lazy\"\u003e\u003c\/p\u003e","brand":"Electronics Hub","offers":[{"title":"Default Title","offer_id":54466804187449,"sku":"product-6264","price":25.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/TIP122-transistor.jpg?v=1789233577","url":"https:\/\/electronicshub.pk\/products\/tip122-npn-darlington-transistor","provider":"Electronics Hub","version":"1.0","type":"link"}