Phototransistors
(265)Phototransistors are semiconductor optoelectronic devices. Phototransistors are usually bipolar transistors. The current in the phototransistor depends on the intensity of incident light. With bright lighting, the base-collector voltage is around 0V. In other aspects, phototransistors are similar to conventional transistors, so they are easy to implement and used in many applications.
Construction of phototransistors
A phototransistor has a photodiode at its base-collector junction. The current flow between the collector and the emitter is determined by the current generated by light (photons) falling on the base-collector junction (just like in the case of an ordinary transistor).Since phototransistor are light-sensitive devices, they are packaged in transparent housings and are visually similar to LEDs (3/5mm). A phototransistor can be either a two-lead (emitter-collector) or a three-lead device (where the base lead is brought out). They are available in both through-hole and surface mount (THT, SMT) housings, as well as in a miniature 0805 package.
Applications of phototransistors
Although phototransistors have shorter response time than photoresistors, they are inferior to photodiodes in this respect. They also need relatively intense lighting to work properly. Nevertheless, since they are characterized by their broad-spectrum sensitivity, they are ideal, among other things, as infrared receivers. Phototransistors are used as components of photoelectric sensors, as well as in automation and security systems.Phototransistors are used in optocouplers, i.e. devices that galvanically separates circuits, e.g., in telecommunications equipment or when using microcontroller outputs to control inductive loads (electromagnetic relays etc.). This is why optocouplers have related operating parameters to phototransistors.
Phototransistor parameters
Generally, phototransistors should be selected taking into account electrical parameters of bipolar transistors. Certainly, attention should be paid to the collector-emitter voltage and power (heat dissipation).There are several features specific to phototransistors or optoelectronic semiconductor devices. These include the viewing angle, which allows determining the optimal incident angle in relation to the component face; the dark current, i.e. the leakage current of the collector-base junction when the device is supposed to be off; the peak sensitivity wavelength (here it should be remembered that phototransistors are very sensitive to radiation, and this parameter only determines the peak sensitivity wavelength). In some applications, especially in the field of communication, the switch-on and switch-off times, which determine how long it takes for the phototransistor to reach the nominal conduction for a given light intensity, will be of great importance.Taking into account the specifics of a given project, the dimensions of the PCB, and even aesthetic considerations, attention should also be paid to the mechanical parameters, including the shape, diameter, and colour of the lens (note: it can be used as an IR filter, limiting the amount of light reaching the device). And, of course, assembly method.
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Phototransistor; THT; 75mW; 3mm; λp max: 940nm; 30V; 30°
Manufacturer part number: LL-304PTD4B-1A
Manufacturer: LUCKYLIGHT
Net price for quantities from 5 pcs - 0.17 USDGross price for quantities from 5 pcs - 0.17 USD
Net price for quantities from 30 pcs - 0.07 USDGross price for quantities from 30 pcs - 0.07 USD
Net price for quantities from 100 pcs - 0.06 USDGross price for quantities from 100 pcs - 0.06 USD
Net price for quantities from 500 pcs - 0.06 USDGross price for quantities from 500 pcs - 0.06 USD
Net price for quantities from 2000 pcs - 0.05 USDGross price for quantities from 2000 pcs - 0.05 USD
22525 in TME stock
No. of pieces (Multiplicity: 5)
Phototransistor; 1206; SMD; 75mW; Dim: 3.2x1.6x1.1mm; λp max: 940nm
Manufacturer part number: LL-S150PTD-1A
Manufacturer: LUCKYLIGHT
Net price for quantities from 4 pcs - 0.21 USDGross price for quantities from 4 pcs - 0.21 USD
Net price for quantities from 20 pcs - 0.14 USDGross price for quantities from 20 pcs - 0.14 USD
Net price for quantities from 100 pcs - 0.13 USDGross price for quantities from 100 pcs - 0.13 USD
Net price for quantities from 500 pcs - 0.12 USDGross price for quantities from 500 pcs - 0.12 USD
Net price for quantities from 1000 pcs - 0.11 USDGross price for quantities from 1000 pcs - 0.11 USD
0 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 3mm; λp max: 570nm; 6V; 30°; λd: 440÷800nm
Manufacturer part number: TEPT4400
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 0.39 USDGross price for quantities from 1 pcs - 0.39 USD
Net price for quantities from 10 pcs - 0.35 USDGross price for quantities from 10 pcs - 0.35 USD
Net price for quantities from 25 pcs - 0.33 USDGross price for quantities from 25 pcs - 0.33 USD
Net price for quantities from 50 pcs - 0.32 USDGross price for quantities from 50 pcs - 0.32 USD
Net price for quantities from 100 pcs - 0.30 USDGross price for quantities from 100 pcs - 0.30 USD
Net price for quantities from 250 pcs - 0.28 USDGross price for quantities from 250 pcs - 0.28 USD
Net price for quantities from 500 pcs - 0.27 USDGross price for quantities from 500 pcs - 0.27 USD
Net price for quantities from 1000 pcs - 0.26 USDGross price for quantities from 1000 pcs - 0.26 USD
Net price for quantities from 5000 pcs - 0.24 USDGross price for quantities from 5000 pcs - 0.24 USD
Net price for quantities from 10000 pcs - 0.23 USDGross price for quantities from 10000 pcs - 0.23 USD
2503 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 5mm; λp max: 940nm; 30V; 30°
Manufacturer part number: L-53P3C
Manufacturer: KINGBRIGHT ELECTRONIC
Net price for quantities from 1 pcs - 0.21 USDGross price for quantities from 1 pcs - 0.21 USD
Net price for quantities from 100 pcs - 0.18 USDGross price for quantities from 100 pcs - 0.18 USD
Net price for quantities from 400 pcs - 0.16 USDGross price for quantities from 400 pcs - 0.16 USD
Net price for quantities from 1000 pcs - 0.15 USDGross price for quantities from 1000 pcs - 0.15 USD
Net price for quantities from 3000 pcs - 0.13 USDGross price for quantities from 3000 pcs - 0.13 USD
6656 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; SMD; 580nm; 60V; 120°
Manufacturer part number: KPS-3227SP1C
Manufacturer: KINGBRIGHT ELECTRONIC
Net price for quantities from 1 pcs - 0.78 USDGross price for quantities from 1 pcs - 0.78 USD
Net price for quantities from 10 pcs - 0.53 USDGross price for quantities from 10 pcs - 0.53 USD
Net price for quantities from 20 pcs - 0.49 USDGross price for quantities from 20 pcs - 0.49 USD
Net price for quantities from 30 pcs - 0.48 USDGross price for quantities from 30 pcs - 0.48 USD
Net price for quantities from 50 pcs - 0.45 USDGross price for quantities from 50 pcs - 0.45 USD
Net price for quantities from 100 pcs - 0.43 USDGross price for quantities from 100 pcs - 0.43 USD
Net price for quantities from 200 pcs - 0.41 USDGross price for quantities from 200 pcs - 0.41 USD
Net price for quantities from 1000 pcs - 0.36 USDGross price for quantities from 1000 pcs - 0.36 USD
Net price for quantities from 2000 pcs - 0.35 USDGross price for quantities from 2000 pcs - 0.35 USD
Net price for quantities from 4000 pcs - 0.33 USDGross price for quantities from 4000 pcs - 0.33 USD
16863 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 3mm; λp max: 940nm; 30V; 30°
Manufacturer part number: L-93DP3C
Manufacturer: KINGBRIGHT ELECTRONIC
Net price for quantities from 1 pcs - 0.19 USDGross price for quantities from 1 pcs - 0.19 USD
Net price for quantities from 5 pcs - 0.18 USDGross price for quantities from 5 pcs - 0.18 USD
Net price for quantities from 100 pcs - 0.16 USDGross price for quantities from 100 pcs - 0.16 USD
Net price for quantities from 1000 pcs - 0.13 USDGross price for quantities from 1000 pcs - 0.13 USD
21457 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 3mm; λp max: 940nm; 30V; 20°; Lens: black
Manufacturer part number: LTR-4206E
Manufacturer: LITEON
Net price for quantities from 1 pcs - 0.12 USDGross price for quantities from 1 pcs - 0.12 USD
Net price for quantities from 10 pcs - 0.08 USDGross price for quantities from 10 pcs - 0.08 USD
Net price for quantities from 100 pcs - 0.07 USDGross price for quantities from 100 pcs - 0.07 USD
Net price for quantities from 300 pcs - 0.06 USDGross price for quantities from 300 pcs - 0.06 USD
Net price for quantities from 1000 pcs - 0.06 USDGross price for quantities from 1000 pcs - 0.06 USD
Net price for quantities from 10000 pcs - 0.06 USDGross price for quantities from 10000 pcs - 0.06 USD
28384 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 5mm; λp max: 570nm; 6V; 20°; Lens: transparent
Manufacturer part number: TEPT5600
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 0.60 USDGross price for quantities from 1 pcs - 0.60 USD
Net price for quantities from 5 pcs - 0.55 USDGross price for quantities from 5 pcs - 0.55 USD
Net price for quantities from 10 pcs - 0.52 USDGross price for quantities from 10 pcs - 0.52 USD
Net price for quantities from 25 pcs - 0.46 USDGross price for quantities from 25 pcs - 0.46 USD
Net price for quantities from 50 pcs - 0.43 USDGross price for quantities from 50 pcs - 0.43 USD
Net price for quantities from 100 pcs - 0.39 USDGross price for quantities from 100 pcs - 0.39 USD
Net price for quantities from 250 pcs - 0.38 USDGross price for quantities from 250 pcs - 0.38 USD
2606 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; Dim: 4.4x1.5x5.72mm; λp max: 940nm; 30V
Manufacturer part number: LTR-301
Manufacturer: LITEON
Net price for quantities from 1 pcs - 0.15 USDGross price for quantities from 1 pcs - 0.15 USD
Net price for quantities from 10 pcs - 0.13 USDGross price for quantities from 10 pcs - 0.13 USD
Net price for quantities from 100 pcs - 0.11 USDGross price for quantities from 100 pcs - 0.11 USD
Net price for quantities from 500 pcs - 0.09 USDGross price for quantities from 500 pcs - 0.09 USD
Net price for quantities from 1000 pcs - 0.09 USDGross price for quantities from 1000 pcs - 0.09 USD
Net price for quantities from 2000 pcs - 0.08 USDGross price for quantities from 2000 pcs - 0.08 USD
Net price for quantities from 3000 pcs - 0.08 USDGross price for quantities from 3000 pcs - 0.08 USD
Net price for quantities from 5000 pcs - 0.08 USDGross price for quantities from 5000 pcs - 0.08 USD
Net price for quantities from 10000 pcs - 0.07 USDGross price for quantities from 10000 pcs - 0.07 USD
Net price for quantities from 20000 pcs - 0.07 USDGross price for quantities from 20000 pcs - 0.07 USD
15484 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 5mm; λp max: 940nm; 30V; 30°
Manufacturer part number: L-53P3BT
Manufacturer: KINGBRIGHT ELECTRONIC
Net price for quantities from 5 pcs - 0.21 USDGross price for quantities from 5 pcs - 0.21 USD
Net price for quantities from 30 pcs - 0.16 USDGross price for quantities from 30 pcs - 0.16 USD
Net price for quantities from 100 pcs - 0.13 USDGross price for quantities from 100 pcs - 0.13 USD
Net price for quantities from 500 pcs - 0.13 USDGross price for quantities from 500 pcs - 0.13 USD
Net price for quantities from 2000 pcs - 0.12 USDGross price for quantities from 2000 pcs - 0.12 USD
2571 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 1.8mm; λp max: 825nm; 32V; 24°
Manufacturer part number: BPW17N
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 0.72 USDGross price for quantities from 1 pcs - 0.72 USD
Net price for quantities from 10 pcs - 0.40 USDGross price for quantities from 10 pcs - 0.40 USD
Net price for quantities from 25 pcs - 0.37 USDGross price for quantities from 25 pcs - 0.37 USD
Net price for quantities from 50 pcs - 0.35 USDGross price for quantities from 50 pcs - 0.35 USD
Net price for quantities from 100 pcs - 0.33 USDGross price for quantities from 100 pcs - 0.33 USD
Net price for quantities from 500 pcs - 0.29 USDGross price for quantities from 500 pcs - 0.29 USD
Net price for quantities from 1000 pcs - 0.27 USDGross price for quantities from 1000 pcs - 0.27 USD
Net price for quantities from 2000 pcs - 0.26 USDGross price for quantities from 2000 pcs - 0.26 USD
Net price for quantities from 2500 pcs - 0.25 USDGross price for quantities from 2500 pcs - 0.25 USD
Net price for quantities from 4000 pcs - 0.25 USDGross price for quantities from 4000 pcs - 0.25 USD
4004 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 5mm; λp max: 570nm; 6V; 50°; Lens: transparent
Manufacturer part number: TEPT5700
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 0.58 USDGross price for quantities from 1 pcs - 0.58 USD
Net price for quantities from 10 pcs - 0.53 USDGross price for quantities from 10 pcs - 0.53 USD
Net price for quantities from 100 pcs - 0.47 USDGross price for quantities from 100 pcs - 0.47 USD
Net price for quantities from 500 pcs - 0.45 USDGross price for quantities from 500 pcs - 0.45 USD
Net price for quantities from 1000 pcs - 0.43 USDGross price for quantities from 1000 pcs - 0.43 USD
Net price for quantities from 2000 pcs - 0.41 USDGross price for quantities from 2000 pcs - 0.41 USD
Net price for quantities from 4000 pcs - 0.37 USDGross price for quantities from 4000 pcs - 0.37 USD
Net price for quantities from 8000 pcs - 0.35 USDGross price for quantities from 8000 pcs - 0.35 USD
6305 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 165mW; 3mm; λp max: 860nm; 35V; 12°
Manufacturer part number: SFH 309-4
Manufacturer: ams OSRAM
Net price for quantities from 2 pcs - 0.50 USDGross price for quantities from 2 pcs - 0.50 USD
Net price for quantities from 10 pcs - 0.29 USDGross price for quantities from 10 pcs - 0.29 USD
Net price for quantities from 100 pcs - 0.28 USDGross price for quantities from 100 pcs - 0.28 USD
Net price for quantities from 500 pcs - 0.25 USDGross price for quantities from 500 pcs - 0.25 USD
Net price for quantities from 1000 pcs - 0.23 USDGross price for quantities from 1000 pcs - 0.23 USD
Net price for quantities from 2000 pcs - 0.22 USDGross price for quantities from 2000 pcs - 0.22 USD
Net price for quantities from 4000 pcs - 0.21 USDGross price for quantities from 4000 pcs - 0.21 USD
8849 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; TO18; THT; 850nm; 70V; 20°; Lens: transparent
Manufacturer part number: BPW77NB
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 3.79 USDGross price for quantities from 1 pcs - 3.79 USD
Net price for quantities from 10 pcs - 2.84 USDGross price for quantities from 10 pcs - 2.84 USD
Net price for quantities from 25 pcs - 2.61 USDGross price for quantities from 25 pcs - 2.61 USD
Net price for quantities from 50 pcs - 2.46 USDGross price for quantities from 50 pcs - 2.46 USD
Net price for quantities from 75 pcs - 2.37 USDGross price for quantities from 75 pcs - 2.37 USD
Net price for quantities from 100 pcs - 2.29 USDGross price for quantities from 100 pcs - 2.29 USD
Net price for quantities from 300 pcs - 2.05 USDGross price for quantities from 300 pcs - 2.05 USD
Net price for quantities from 500 pcs - 2.00 USDGross price for quantities from 500 pcs - 2.00 USD
1218 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 165mW; 3mm; λp max: 900nm; 35V; 12°
Manufacturer part number: SFH 309 FA-4
Manufacturer: ams OSRAM
Net price for quantities from 1 pcs - 0.61 USDGross price for quantities from 1 pcs - 0.61 USD
Net price for quantities from 10 pcs - 0.44 USDGross price for quantities from 10 pcs - 0.44 USD
Net price for quantities from 25 pcs - 0.39 USDGross price for quantities from 25 pcs - 0.39 USD
Net price for quantities from 50 pcs - 0.35 USDGross price for quantities from 50 pcs - 0.35 USD
Net price for quantities from 100 pcs - 0.32 USDGross price for quantities from 100 pcs - 0.32 USD
Net price for quantities from 500 pcs - 0.27 USDGross price for quantities from 500 pcs - 0.27 USD
Net price for quantities from 1000 pcs - 0.24 USDGross price for quantities from 1000 pcs - 0.24 USD
Net price for quantities from 2000 pcs - 0.23 USDGross price for quantities from 2000 pcs - 0.23 USD
Net price for quantities from 4000 pcs - 0.21 USDGross price for quantities from 4000 pcs - 0.21 USD
Net price for quantities from 10000 pcs - 0.19 USDGross price for quantities from 10000 pcs - 0.19 USD
4667 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; THT; 5mm; λp max: 950nm; 70V; 30°
Manufacturer part number: BPV11F
Manufacturer: VISHAY
Net price for quantities from 1 pcs - 0.81 USDGross price for quantities from 1 pcs - 0.81 USD
Net price for quantities from 10 pcs - 0.58 USDGross price for quantities from 10 pcs - 0.58 USD
Net price for quantities from 25 pcs - 0.52 USDGross price for quantities from 25 pcs - 0.52 USD
Net price for quantities from 50 pcs - 0.48 USDGross price for quantities from 50 pcs - 0.48 USD
Net price for quantities from 100 pcs - 0.45 USDGross price for quantities from 100 pcs - 0.45 USD
Net price for quantities from 500 pcs - 0.40 USDGross price for quantities from 500 pcs - 0.40 USD
Net price for quantities from 1000 pcs - 0.38 USDGross price for quantities from 1000 pcs - 0.38 USD
Net price for quantities from 2000 pcs - 0.36 USDGross price for quantities from 2000 pcs - 0.36 USD
Net price for quantities from 6000 pcs - 0.34 USDGross price for quantities from 6000 pcs - 0.34 USD
4377 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 165mW; 3mm; λp max: 860nm; 35V; 12°
Manufacturer part number: SFH 309-5
Manufacturer: ams OSRAM
Net price for quantities from 10 pcs - 0.48 USDGross price for quantities from 10 pcs - 0.48 USD
Net price for quantities from 50 pcs - 0.32 USDGross price for quantities from 50 pcs - 0.32 USD
Net price for quantities from 100 pcs - 0.23 USDGross price for quantities from 100 pcs - 0.23 USD
Net price for quantities from 200 pcs - 0.22 USDGross price for quantities from 200 pcs - 0.22 USD
3544 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 5mm; λp max: 940nm; 30V; 20°
Manufacturer part number: LTR-3208
Manufacturer: LITEON
Net price for quantities from 1 pcs - 0.32 USDGross price for quantities from 1 pcs - 0.32 USD
Net price for quantities from 10 pcs - 0.21 USDGross price for quantities from 10 pcs - 0.21 USD
Net price for quantities from 25 pcs - 0.12 USDGross price for quantities from 25 pcs - 0.12 USD
Net price for quantities from 1000 pcs - 0.09 USDGross price for quantities from 1000 pcs - 0.09 USD
6770 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; SMD; Dim: 1.6x0.8x0.8mm; λp max: 940nm; 30V
Manufacturer part number: PT19-21B/L41/TR8
Manufacturer: EVERLIGHT
Net price for quantities from 1 pcs - 0.07 USDGross price for quantities from 1 pcs - 0.07 USD
Net price for quantities from 10 pcs - 0.06 USDGross price for quantities from 10 pcs - 0.06 USD
Net price for quantities from 100 pcs - 0.06 USDGross price for quantities from 100 pcs - 0.06 USD
Net price for quantities from 500 pcs - 0.06 USDGross price for quantities from 500 pcs - 0.06 USD
Net price for quantities from 1000 pcs - 0.06 USDGross price for quantities from 1000 pcs - 0.06 USD
Net price for quantities from 4000 pcs - 0.05 USDGross price for quantities from 4000 pcs - 0.05 USD
Net price for quantities from 8000 pcs - 0.05 USDGross price for quantities from 8000 pcs - 0.05 USD
Net price for quantities from 12000 pcs - 0.05 USDGross price for quantities from 12000 pcs - 0.05 USD
4000 in TME stock
No. of pieces (Multiplicity: 1)
Phototransistor; T1; THT; 165mW; 3mm; λp max: 900nm; 35V; 12°
Manufacturer part number: SFH 309 FA
Manufacturer: ams OSRAM
Net price for quantities from 1 pcs - 0.33 USDGross price for quantities from 1 pcs - 0.33 USD
Net price for quantities from 5 pcs - 0.26 USDGross price for quantities from 5 pcs - 0.26 USD
Net price for quantities from 10 pcs - 0.20 USDGross price for quantities from 10 pcs - 0.20 USD
Net price for quantities from 20 pcs - 0.18 USDGross price for quantities from 20 pcs - 0.18 USD
Net price for quantities from 2000 pcs - 0.17 USDGross price for quantities from 2000 pcs - 0.17 USD
1012 in TME stock
No. of pieces (Multiplicity: 1)