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Bipolar transistors (BJTs)

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KT3117A1, NPN transistor 60V 0.4A 0.3W 200MHz TO92 (KT-26) 5-7 days, 4689 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 60 Maximum allowable current to (Ik max. A): 0.4 Static current transfer ratio h21e min: 40…200 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.5 Housing: kt-26 (to-92)	quick view	5-7 days, 4689 pcs.	116 ֏ 61 ֏ × from 100 pcs. — 46 ֏
KT3129A9, PNP transistor, universal 5-8 days, 48 pcs. Brand: Integral Structure: pnp Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 30…120 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.075 Housing: kt-46 (sot-23)	quick view	5-8 days, 48 pcs.	146 ֏ 100 ֏ × from 100 pcs. — 84 ֏
KT3129B9, PNP transistor, universal [KT-46A] (= BC857A) 5-8 days, 1 pcs. Brand: Integral Structure: pnp Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 80…250 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.075 Housing: kt-46 (sot-23)	quick view	5-8 days, 1 pcs.	122 ֏ 89 ֏ × from 100 pcs. — 79 ֏
KT3130V9, NPN transistor, universal 5-8 days, 438 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 20 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 200…500 Cutoff frequency of current transfer ratio fgr.MHz: 150 Maximum power dissipation, W: 0.1 Housing: kt-46 (sot-23)	quick view	5-8 days, 438 pcs.	122 ֏ 82 ֏ × from 100 pcs. — 70 ֏
KT3130G9, NPN transistor, universal 5-7 days, 1582 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 15 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 400…1000 Cutoff frequency of current transfer ratio fgr.MHz: 300 Maximum power dissipation, W: 0.1 Housing: kt-46 (sot-23)	quick view	5-7 days, 1582 pcs.	146 ֏ 102 ֏ × from 100 pcs. — 87 ֏
KT3130E9, NPN transistor, universal 5-7 days, 2739 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 15 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 400…1000 Cutoff frequency of current transfer ratio fgr.MHz: 300 Maximum power dissipation, W: 0.1 Housing: kt-46 (sot-23)	quick view	5-7 days, 2739 pcs.	122 ֏ 89 ֏ × from 100 pcs. — 79 ֏
KT3142A, Bipolar transistor, NPN, 40V, 200mA, 0.36W, 500MHz [KT1-7 / TO-18] (= 2N2369) 5-7 days, 154 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 40…100 Cutoff frequency of current transfer ratio fgr.MHz: 500 Maximum power dissipation, W: 0.36 Housing: kt-1-7 (to-18)	quick view	5-7 days, 154 pcs.	1 160 ֏ 930 ֏ × from 15 pcs. — 880 ֏
KT368AM, NPN transistor of low power, high frequency 5-7 days, 2744 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 15 Maximum allowable current to (Ik max. A): 0.03 Static current transfer ratio h21e min: 50…450 Cutoff frequency of current transfer ratio fgr.MHz: 900 Maximum power dissipation, W: 0.225 Housing: kt-26 (to-92)	quick view	5-7 days, 2744 pcs.	122 ֏ 83 ֏ × from 15 pcs. — 74 ֏
KT660A, NPN transistor (=BC337-16) 5-7 days, 5 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 45 Maximum allowable current to (Ik max. A): 0.8 Static current transfer ratio h21e min: 110…220 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.5 Housing: kt-26 (to-92)	quick view	5-7 days, 5 pcs.	116 ֏ 61 ֏ × from 100 pcs. — 46 ֏
KT8116A, Bipolar transistor NPN, 100V, 5A, 65W, 4MHz [KT-28 / TO-220] (= TIP122) 5-7 days, 505 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 100 Maximum allowable current to (Ik max. A): 8 Static current transfer ratio h21e min: 1000 Cutoff frequency of current transfer ratio fgr.MHz: 4 Maximum power dissipation, W: 65 Housing: kt-28-2 (to-220)	quick view	5-7 days, 505 pcs.	910 ֏ 620 ֏ × from 15 pcs. — 540 ֏
KT940B, NPN transistor, 250V, 0.1A, 1.2W, h21e = 25 [KT-27 / TO-126] (= BF458) 5-7 days, 113 pcs. Brand: Integral Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 250 Maximum allowable current to (Ik max. A): 0.1 Static current transfer ratio h21e min: 25 Cutoff frequency of current transfer ratio fgr.MHz: 90 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	5-7 days, 113 pcs.	219 ֏ 133 ֏ × from 50 pcs. — 116 ֏
KT972A, Bipolar transistor, NPN, 60V, 2A, 8W, h21e 750 [KT-27] (= BD875) 5-7 days, 10129 pcs. Brand: Integral Structure: npn darlington Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 60 Maximum allowable current to (Ik max. A): 4 Static current transfer ratio h21e min: 750 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 8 Housing: kt-27-2 (to-126)	quick view	5-7 days, 10129 pcs.	182 ֏ 135 ֏ × from 15 pcs. — 126 ֏
KT972B, NPN transistor 45V 2A 8W 200MHz, KT-27 (TO-126) (BD875) 5-7 days, 2922 pcs. Brand: Integral Structure: npn darlington Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 45 Maximum allowable current to (Ik max. A): 4 Static current transfer ratio h21e min: 750 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 8 Housing: kt-27-2 (to-126)	quick view	5-7 days, 2922 pcs.	182 ֏ 130 ֏ × from 15 pcs. — 121 ֏
KT973A, Darlington transistor, PNP, 60V, 2A, 1.25W, h21e 750 ... 5000 [KT-27 / TO-126] (= BD876) 5-7 days, 402 pcs. Brand: Integral Structure: pnp darlington Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 60 Maximum allowable current to (Ik max. A): 4 Static current transfer ratio h21e min: 750 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 8 Housing: kt-27-2 (to-126)	quick view	5-7 days, 402 pcs.	275 ֏ × from 15 pcs. — 237 ֏
KT973B, Darlington transistor, PNP, 45V, 2A, 1.25W, h21e = 750 [KT-27 / TO-126] 5-7 days, 733 pcs. Brand: Integral Structure: pnp darlington Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 45 Maximum allowable current to (Ik max. A): 4 Static current transfer ratio h21e min: 750 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 8 Housing: kt-27-2 (to-126)	quick view	5-7 days, 733 pcs.	182 ֏ 130 ֏ × from 15 pcs. — 121 ֏
2N3773G, NPN Transistor 150W 4MHz [TO-3] Brand: ON Semiconductor Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 140 Maximum allowable current to (Ik max. A): 16 Static current transfer ratio h21e min: 15 Cutoff frequency of current transfer ratio fgr.MHz: 4 Maximum power dissipation, W: 150 Housing: to-3	quick view		6 500 ֏ 5 200 ֏ × from 10 pcs. — 4 730 ֏
2N3904, NPN transistor 40V 0.2A 0.35W [TO-92 Ammo] 5-7 days, 14941 pcs. Brand: Diotec Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 60 Cutoff frequency of current transfer ratio fgr.MHz: 300 Maximum power dissipation, W: 0.625 Housing: to-92	quick view	5-7 days, 14941 pcs.	31 ֏ 20 ֏ × from 100 pcs. — 16 ֏
2N3906BU, PNP transistor 40V 0.2A [TO-92] Brand: ON Semiconductor Structure: pnp Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 100 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.625 Housing: to-92	quick view		31 ֏ 20 ֏ × from 100 pcs. — 16 ֏
2N4401BU, NPN transistor 60V 0.6A 0.625W [TO-92] Brand: ON Semiconductor Structure: npn Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 1 Static current transfer ratio h21e min: 100 Cutoff frequency of current transfer ratio fgr.MHz: 250 Maximum power dissipation, W: 0.625 Housing: to-92	quick view		79 ֏ 56 ֏ × from 100 pcs. — 48 ֏
2N4403BU, PNP Transistor 40V 0.6A [TO-92] Brand: ON Semiconductor Structure: pnp Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 40 Maximum allowable current to (Ik max. A): 1 Static current transfer ratio h21e min: 100 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.35 Housing: to-92	quick view		31 ֏ 20 ֏ × from 100 pcs. — 16 ֏

Bipolar transistors are three-electrode semiconductor devices, in which the electrodes are connected to sequentially arranged layers of semiconductors with alternating impurity conduction.

Depending on the alternation method, there are pnp and npn bipolar transistors.

Unlike field-effect transistors, the operation of bipolar transistors is based on the transfer of electric charge of two types, the carriers of which are holes and electrons.

The electrodes connected to the middle layer are called the base, and the electrodes connected to the outer layers are called the collector and emitter (these layers differ in the degree of doping with impurities).

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Bipolar transistors (BJTs)

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