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Bipolar transistors (BJTs)

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KT3102AM (202*g), Bipolar transistor, NPN, 50V, 0.2A, 0.25W, 200 MHz, h21e=100...250 [KT-26 / TO-92] (=BC547A) 4147 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 50 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 100 Static current transfer coefficient h21e max: 250 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: TO-92/CT-26	quick view	4147 pcs.	122 ֏ 113 ֏ ×	from 100 pcs. — 96 ֏
KT3102BM, Bipolar transistor, NPN, 50V, 0.2A, 0.25W, 200MHz, h21e = 200 ... 500 [KT-26 / TO-92] (= BC547B) 753 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 50 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 200 Static current transfer coefficient h21e max: 500 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: TO-92/CT-26	quick view	753 pcs.	98 ֏ ×	from 100 pcs. — 82 ֏
KT3102VM, Bipolar transistor, NPN, 30V, 0.2A, 0.25W, 200MHz, h21e = 200 ... 500 [KT-26 / TO-92] 609 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 30 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 30 Maximum allowable current to (Ik max. A): 0.2 Static current transfer ratio h21e min: 200 Static current transfer coefficient h21e max: 500 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: TO-92/CT-26	quick view	609 pcs.	122 ֏ 103 ֏ ×	from 100 pcs. — 82 ֏
KT3102EM, Bipolar transistor, NPN, 20V, 0.2A, 0.25W, 300MHz, h21e = 400 ... 1000 [KT-26 / TO-92] (= BC549C) 286 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 20 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): 0.2 Static current transfer ratio h21e min: 400 Static current transfer coefficient h21e max: 1000 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: TO-92/CT-26	quick view	286 pcs.	103 ֏ ×	from 100 pcs. — 82 ֏
KT3107A, Bipolar transistor, PNP, -45V, -0.1A, 0.3W, 250MHz, h21e = 70 ... 140 [KT-26 / TO-92] 694 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 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): 0.1 Static current transfer ratio h21e min: 70 Static current transfer coefficient h21e max: 140 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.3 Housing: TO-92/CT-26	quick view	694 pcs.	91 ֏ ×	from 100 pcs. — 77 ֏
KT3107B, Bipolar transistor, PNP, -45V, -0.1A, 0.3W, 250MHz, h21e = 120 ... 220 [KT-26 / TO-92] (= BC307A) 1374 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 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): 0.1 Static current transfer ratio h21e min: 120 Static current transfer coefficient h21e max: 220 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.3 Housing: TO-92/CT-26	quick view	1374 pcs.	158 ֏ 101 ֏ ×	from 100 pcs. — 86 ֏
KT3117A1, NPN transistor 60V 0.4A 0.3W 200MHz TO92 (KT-26) 4158 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 60 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	4158 pcs.	122 ֏ ×	from 100 pcs. — 105 ֏
KT3130A9, NPN 40V 0.1A 0.2W hFE=100 transistor...250 [SOT-23-3 / CT-46.] 4550 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 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: 100…250 Cutoff frequency of current transfer ratio fgr.MHz: 150 Maximum power dissipation, W: 0.1 Housing: kt-46 (sot-23)	quick view	4550 pcs.	191 ֏ ×	from 100 pcs. — 158 ֏
KT3157A, Bipolar transistor, PNP, -250V, -0.03A, 0.2W, 60MHz, h21e = 50 [KT-26 / TO-92] 118 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 250 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): 0.02 Static current transfer ratio h21e min: 50 Cutoff frequency of current transfer ratio fgr.MHz: 60 Maximum power dissipation, W: 0.2 Housing: kt-26 (to-92)	quick view	118 pcs.	91 ֏ 79 ֏ ×	from 100 pcs. — 72 ֏
KT368AM, NPN transistor of low power, high frequency 1269 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 15 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	1269 pcs.	122 ֏ 98 ֏ ×	from 15 pcs. — 82 ֏
KT503E (22g.), Bipolar transistor, NPN, 80V, 0.15A, 0.35W, 5MHz, h21e=40…120 [KT-26 / TO-92] 735 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 100 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 80 Maximum allowable current to (Ik max. A): 0.15 Static current transfer ratio h21e min: 40…120 Cutoff frequency of current transfer ratio fgr.MHz: 5 Maximum power dissipation, W: 0.35 Housing: kt-26 (to-92)	quick view	735 pcs.	140 ֏ 79 ֏ ×	from 100 pcs. — 72 ֏
KT646A, Bipolar transistor, NPN, 60V, 1A, 1W, 250MHz, h21e = 40 ... 200 [KT-27 / TO-126] (= 2SC495) 656 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 60 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 50 Maximum allowable current to (Ik max. A): 1 Static current transfer ratio h21e min: 40…200 Cutoff frequency of current transfer ratio fgr.MHz: 250 Maximum power dissipation, W: 1 Housing: kt-27-2 (to-126)	quick view	656 pcs.	237 ֏ 191 ֏ ×	from 100 pcs. — 172 ֏
KT805AM, Bipolar transistor, NPN, 60V, 5A, 30W, h21e= 15 [KT-28 / TO-220] 1141 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): 5 Static current transfer ratio h21e min: 15 Cutoff frequency of current transfer ratio fgr.MHz: 20 Maximum power dissipation, W: 30 Housing: kt-28-2 (to-220)	quick view	1141 pcs.	910 ֏ 640 ֏ ×	from 15 pcs. — 570 ֏
CT814A, PNP Transistor 40V 1.5A 10W hFE=40min [CT-27 / TO-126.] 277 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 40 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): 1.5 Static current transfer ratio h21e min: 40 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	277 pcs.	237 ֏ 198 ֏ ×	from 20 pcs. — 186 ֏
CT814V, PNP Transistor 70V 1.5A 10W hFE=40min [CT-27 / TO-126.] (=BD138) 726 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 70 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 70 Maximum allowable current to (Ik max. A): 1.5 Static current transfer ratio h21e min: 40 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	726 pcs.	232 ֏ ×	from 20 pcs. — 210 ֏
KT815A, NPN Transistor 40V 1.5A 10W hFE=40min [KT-27 / TO-126.] 7 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 40 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): 1.5 Static current transfer ratio h21e min: 40 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	7 pcs.	237 ֏ 198 ֏ ×	from 20 pcs. — 186 ֏
KT815B, NPN Transistor 50V 1.5A 10W hFE=40min [KT-27 / TO-126.] (=BD135) 1360 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 50 Max. ex. k-e at a given current k and an open circuit b. (Ukeo max), V: 50 Maximum allowable current to (Ik max. A): 1.5 Static current transfer ratio h21e min: 40 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	1360 pcs.	291 ֏ 198 ֏ ×	from 20 pcs. — 186 ֏
KT815G (14g.- n/a 20g., 22g., 2025g.), NPN Transistor 100V 1.5A 10W hFE=40min [KT-27 / TO-126.] (=BD139) 6397 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 100 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): 1.5 Static current transfer ratio h21e min: 40 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 10 Housing: kt-27-2 (to-126)	quick view	6397 pcs.	310 ֏ 232 ֏ ×	from 20 pcs. — 210 ֏
CT816G, PNP Transistor 100V 3A 25W hFE=25...275 [CT-27-2 / TO-126.] (=BD238) 2271 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 100 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): 3 Static current transfer ratio h21e min: 25 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 25 Housing: kt-27-2 (to-126)	quick view	2271 pcs.	261 ֏ 232 ֏ ×	from 15 pcs. — 205 ֏
KT817A, Bipolar transistor, NPN, 40V, 3A, 10W, 3MHz [KT-27 / TO-126] 773 pcs. Brand: Integral Structure: npn Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 40 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): 3 Static current transfer ratio h21e min: 25 Cutoff frequency of current transfer ratio fgr.MHz: 3 Maximum power dissipation, W: 25 Housing: kt-27-2 (to-126)	quick view	773 pcs.	260 ֏ ×	from 15 pcs. — 201 ֏

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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