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Bipolar transistors (BJTs)

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KT3102AM, Bipolar transistor, NPN, 50V, 0.2A, 0.25W, 200MHz, h21e = 100 ... 250 [KT-26 / TO-92] (= BC547A) 1470 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…250 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: kt-26 (to-92)	quick view	1470 pcs.	122 ֏ 79 ֏ ×	from 100 pcs. — 65 ֏
KT3102BM, Bipolar transistor, NPN, 50V, 0.2A, 0.25W, 200MHz, h21e = 200 ... 500 [KT-26 / TO-92] (= BC547B) 434 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…500 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: kt-26 (to-92)	quick view	434 pcs.	68 ֏ ×	from 100 pcs. — 57 ֏
KT3102VM, Bipolar transistor, NPN, 30V, 0.2A, 0.25W, 200MHz, h21e = 200 ... 500 [KT-26 / TO-92] 1351 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…500 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: kt-26 (to-92)	quick view	1351 pcs.	122 ֏ 71 ֏ ×	from 100 pcs. — 58 ֏
KT3102GM, Bipolar transistor, NPN, 20V, 0.2A, 0.25W, 200MHz, h21e = 400 ... 800 [KT-26 / TO-92] (= BC548C) 11 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…1000 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: kt-26 (to-92)	quick view	11 pcs.	182 ֏ 71 ֏ ×	from 100 pcs. — 58 ֏
KT3102EM, Bipolar transistor, NPN, 20V, 0.2A, 0.25W, 300MHz, h21e = 400 ... 1000 [KT-26 / TO-92] (= BC549C) 906 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…1000 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.25 Housing: kt-26 (to-92)	quick view	906 pcs.	182 ֏ 71 ֏ ×	from 100 pcs. — 58 ֏
KT3107A, Bipolar transistor, PNP, -45V, -0.1A, 0.3W, 250MHz, h21e = 70 ... 140 [KT-26 / TO-92] 1946 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…140 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.3 Housing: kt-26 (to-92)	quick view	1946 pcs.	91 ֏ 63 ֏ ×	from 100 pcs. — 54 ֏
KT3107B, Bipolar transistor, PNP, -45V, -0.1A, 0.3W, 250MHz, h21e = 120 ... 220 [KT-26 / TO-92] (= BC307A) 3482 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…220 Cutoff frequency of current transfer ratio fgr.MHz: 200 Maximum power dissipation, W: 0.3 Housing: kt-26 (to-92)	quick view	3482 pcs.	158 ֏ 70 ֏ ×	from 100 pcs. — 62 ֏
KT3117A1, NPN transistor 60V 0.4A 0.3W 200MHz TO92 (KT-26) 3620 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	3620 pcs.	116 ֏ 86 ֏ ×	from 100 pcs. — 73 ֏
KT3130A9, NPN transistor 50V 0.1A 150 MHz 0.1W [KT-46] 4623 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	4623 pcs.	136 ֏ ×	from 100 pcs. — 111 ֏
KT3157A, Bipolar transistor, PNP, -250V, -0.03A, 0.2W, 60MHz, h21e = 50 [KT-26 / TO-92] 399 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	399 pcs.	91 ֏ 56 ֏ ×	from 100 pcs. — 49 ֏
KT368AM, NPN transistor of low power, high frequency 2453 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	2453 pcs.	122 ֏ 68 ֏ ×	from 15 pcs. — 58 ֏
KT502E (22g.), Bipolar transistor, PNP, -80V, -0.15A, 0.35W, 5MHz, h21e=40…120 [KT-26 / TO-92] 15 pcs. Brand: Integral Structure: pnp Max. ex. k-b at a given reverse current k and open circuit e. (Ukbo max), V: 90 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	15 pcs.	91 ֏ 46 ֏ ×	from 15 pcs. — 37 ֏
KT503A, Bipolar transistor, NPN, 25V, 0.15A, 0.35W, 5MHz, h21e = 40 ... 120 [KT-26 / TO-92] 15 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: 25 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	15 pcs.	91 ֏ 56 ֏ ×	from 100 pcs. — 49 ֏
KT503E (22g.), Bipolar transistor, NPN, 80V, 0.15A, 0.35W, 5MHz, h21e=40…120 [KT-26 / TO-92] 3179 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	3179 pcs.	140 ֏ 56 ֏ ×	from 100 pcs. — 49 ֏
KT646A, Bipolar transistor, NPN, 60V, 1A, 1W, 250MHz, h21e = 40 ... 200 [KT-27 / TO-126] (= 2SC495) 1110 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	1110 pcs.	237 ֏ 134 ֏ ×	from 100 pcs. — 123 ֏
KT805AM, Bipolar transistor, NPN, 60V, 5A, 30W, h21e= 15 [KT-28 / TO-220] 1529 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	1529 pcs.	910 ֏ 451 ֏ ×	from 15 pcs. — 401 ֏
KT805BM, Bipolar transistor, NPN, 60V, 5A, 30W, h21e= 15 [KT-28 / TO-220] 10 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	10 pcs.	670 ֏ 352 ֏ ×	from 15 pcs. — 314 ֏
KT814A, Bipolar transistor, PNP, 40V, 1.5A, 10W, [KT-27 / TO-126] 265 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	265 pcs.	237 ֏ 137 ֏ ×	from 15 pcs. — 121 ֏
KT814V, Bipolar transistor, PNP, 70V, 1.5A, 10W, [KT-27 / TO-126] (= BD138) 487 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	487 pcs.	237 ֏ 128 ֏ ×	from 30 pcs. — 111 ֏
KT814G (13g. n/a 22g., 23g.in.), Bipolar transistor, PNP, 100V, 1.5A, 10W, [KT-27 / TO-126] (=BD140) 15 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): 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	15 pcs.	310 ֏ 162 ֏ ×	from 15 pcs. — 145 ֏

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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