Phototransistors. Reference data

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Phototransistors. Reference data

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Phototransistors differ from photodiodes in the additional amplification of the photocurrent at the emitter pn junction. Phototransistors can operate as photodiodes (floating base mode) or in transistor mode with a bias source in the base circuit. The output of the emitter of the phototransistor is marked with a colored dot on the body or a colored mark on the wire lead. Phototransistors are produced in a glass-to-metal housing with a base input window in two designs, both with and without a separate electrical output of the base.

The main parameters of phototransistors are given in the table; the appearance of phototransistors is shown in fig. 1.

A type	Photosensitive element area, mm²	Basic parameters at a temperature of 20±°C
A type	Photosensitive element area, mm²	Range of delta lambda spectral characteristic, µm	Maximum spectral response delta lambda, _Max, µm	Operating voltage U_р, AT	Dark current I_т, uA	Integral current sensitivity S_{1 int}, µA/Lk, not less than	Impulse time constant t_и, s, no more	Weight, g no more
FT-1K	2,8	0.5 ... 1.12	0.8 ... 0.9	5	3	(0.4)	8e^-5	0.9
FT-2K	2,8	0.5 ... 1.12	0.8 ... 0.9	5	3	(0.4)	8e^-5	0.9
FT-1G	3	0.4 ... 1.8	1.5 ... 1.6	1 ... 5	300	0.2	2e^-4	1.5
FT-2G	1	0.4 ... 1.8	1.5 ... 1.6	12 ... 24	500	2	1e^-5	1.5
FT-3G	3	0.4 ... 1.8	1.5 ... 1.6	10 ... 12	1000	2 ... 7	1e^-4	1.5
FTG-3	3	0.4 ... 1.8	1.5 ... 1.55	5 ... 10	60	1	1(2...10)e^-5	1.8
FTG-4	3	0.4 ... 1.8	1.5 ... 1.55	5 ... 10	40	3	3(2...10)e^-5	1.8
FTG-5	3	0.4 ... 1.8	1.5 ... 1.55	5 ... 10	50	1	(1 ... 2)e^-5	1.8

Phototransistors. Reference data
Rice. 1 Appearance and pinout

A TYPE	Photocurrent IF, uA	dark current IT, uA	Pulse rise time tn, nS	Reverse voltage U_OBR(U_US) AT	Measurement Mode
KTF102A	200	1.0	500	50 (0.5)	Her=60mW/sr R_NAGR=15 kOhm
KTF102A1			800	0,5
KTF102A2
KTF104A	150	1.0	800	0,5	Her=7 Lx
KTF104B	100	5.0
KTF104V	50

Imported phototransistors

	Name	Description
1	L-610MP4BT/BD	npn black plastic phototransistor
2	L-32P3C	T-1 (3mm) crystal lens phototransistor
3	L-51P3C	T-1 3/4 (5mm) crystal lens phototransistor

Author: N.V. Parol, S.A. Kaydalov; Publication: cxem.net

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