TO-92 transistor

TO-92 transistor

TO92 pins Basically transistors in this package are low cost, low power and general purpose types. The list below are the common transistors in TO-92 casing. Transistor coding A - Transistor name B - Maximum Power Dissipation C - Maximum Collector to Emitter voltage D - Maximum Operating Frequency E - Maximum Collector Current F - Transistor common use NPN Transistor  1402  0.4W 50V 175MHz 0.15A Driver 1502  0.25W 30V 550MHz 0.03A FM/RF 1702  0.6W 30V 120MHz 0.8A Audio Power 8050  25V 1A 9011  0.4W 30V 100MHz 0.05A AM/FM/IF 9013  0.625W 25V 0.8A Audio power 9014  0.625W 50V 150MHz 0.15A Driver 9016  0.4W 20V 400MHz 25mA Low-Noise RF 9018  0.625W 12V 9418  25V 1.5A 9626  Gen. Purpose Small Signal 9632  0.35W 30V 0.1A 2N2925  0.2W 25V 125MHz 0.1A 2N2926  0.2W 18V 125MHz 0.1A 2N3391  0.2W 25V 250MHz 0.1A 2N3393  0.2W 25V 125MHz 0.1A 2N3415  0.36W 25V 250MHz 0.1A 2N3416  0.36W 50V 250MHz 0.1A 2N3417  0.36W 50V 125MHz 0.1A 2N3565A  0.25W 25V 40MHz 0.25A 2N3643  0.3W 30V 250MHz 0.5A 2N3646  0.2W 15V 350MHz 0.3A 2N3704  0.36W 30V 100MHz 0.05A 2N3707  0.25W 30V 0.1mA 2N3904  0.625W 40V 100MHz 0.2A PNP Transistor 1602  0.4W 50V 150MHz 0.15A Driver 1802  0.6W 30V 120MHz 0.8A Audio Power 8550  20V 1A 9012  0.625W 25V 0.8A Audio Power 9015  0.625W 50V 150MHz 0.15A Driver 9462  25V 0.6A 9484  50V 0.6A 2N3638A  0.3W 25V 150MHz 0.3A 2N3645  0.3W 60V 200MHz 0.5A 2N3702  0.3W 25V 100MHz 0.05A 2N3905  0.625W 40V 200MHz 0.2A 2N3906  0.625W 40V 250MHz 0.2A

0 Common TO92 Transistors

TO-92 transistor

TO92 pins

Basically transistors in this package are low cost, low power and general purpose types. The list below are the common transistors in TO-92 casing.

Transistor coding

A - Transistor name
B - Maximum Power Dissipation
C - Maximum Collector to Emitter voltage
D - Maximum Operating Frequency
E - Maximum Collector Current
F - Transistor common use

NPN Transistor 
1402  0.4W 50V 175MHz 0.15A Driver
1502  0.25W 30V 550MHz 0.03A FM/RF
1702  0.6W 30V 120MHz 0.8A Audio Power
8050  25V 1A
9011  0.4W 30V 100MHz 0.05A AM/FM/IF
9013  0.625W 25V 0.8A Audio power
9014  0.625W 50V 150MHz 0.15A Driver
9016  0.4W 20V 400MHz 25mA Low-Noise RF
9018  0.625W 12V
9418  25V 1.5A
9626  Gen. Purpose Small Signal
9632  0.35W 30V 0.1A
2N2925  0.2W 25V 125MHz 0.1A
2N2926  0.2W 18V 125MHz 0.1A
2N3391  0.2W 25V 250MHz 0.1A
2N3393  0.2W 25V 125MHz 0.1A
2N3415  0.36W 25V 250MHz 0.1A
2N3416  0.36W 50V 250MHz 0.1A
2N3417  0.36W 50V 125MHz 0.1A
2N3565A  0.25W 25V 40MHz 0.25A
2N3643  0.3W 30V 250MHz 0.5A
2N3646  0.2W 15V 350MHz 0.3A
2N3704  0.36W 30V 100MHz 0.05A
2N3707  0.25W 30V 0.1mA
2N3904  0.625W 40V 100MHz 0.2A

PNP Transistor
1602  0.4W 50V 150MHz 0.15A Driver
1802  0.6W 30V 120MHz 0.8A Audio Power
8550  20V 1A
9012  0.625W 25V 0.8A Audio Power
9015  0.625W 50V 150MHz 0.15A Driver
9462  25V 0.6A
9484  50V 0.6A
2N3638A  0.3W 25V 150MHz 0.3A
2N3645  0.3W 60V 200MHz 0.5A
2N3702  0.3W 25V 100MHz 0.05A
2N3905  0.625W 40V 200MHz 0.2A
2N3906  0.625W 40V 250MHz 0.2A

Note: Some data are from Alexan electronics

Read more at http://www.simple-electronics.com/2012/02/common-to92-transistors.html#qUwJW6j3x2PtgJSS.99

0 Common TO92 Transistors

TO-92 transistor

TO92 pins

Basically transistors in this package are low cost, low power and general purpose types. The list below are the common transistors in TO-92 casing.

Transistor coding

A - Transistor name
B - Maximum Power Dissipation
C - Maximum Collector to Emitter voltage
D - Maximum Operating Frequency
E - Maximum Collector Current
F - Transistor common use

NPN Transistor 
1402  0.4W 50V 175MHz 0.15A Driver
1502  0.25W 30V 550MHz 0.03A FM/RF
1702  0.6W 30V 120MHz 0.8A Audio Power
8050  25V 1A
9011  0.4W 30V 100MHz 0.05A AM/FM/IF
9013  0.625W 25V 0.8A Audio power
9014  0.625W 50V 150MHz 0.15A Driver
9016  0.4W 20V 400MHz 25mA Low-Noise RF
9018  0.625W 12V
9418  25V 1.5A
9626  Gen. Purpose Small Signal
9632  0.35W 30V 0.1A
2N2925  0.2W 25V 125MHz 0.1A
2N2926  0.2W 18V 125MHz 0.1A
2N3391  0.2W 25V 250MHz 0.1A
2N3393  0.2W 25V 125MHz 0.1A
2N3415  0.36W 25V 250MHz 0.1A
2N3416  0.36W 50V 250MHz 0.1A
2N3417  0.36W 50V 125MHz 0.1A
2N3565A  0.25W 25V 40MHz 0.25A
2N3643  0.3W 30V 250MHz 0.5A
2N3646  0.2W 15V 350MHz 0.3A
2N3704  0.36W 30V 100MHz 0.05A
2N3707  0.25W 30V 0.1mA
2N3904  0.625W 40V 100MHz 0.2A

PNP Transistor
1602  0.4W 50V 150MHz 0.15A Driver
1802  0.6W 30V 120MHz 0.8A Audio Power
8550  20V 1A
9012  0.625W 25V 0.8A Audio Power
9015  0.625W 50V 150MHz 0.15A Driver
9462  25V 0.6A
9484  50V 0.6A
2N3638A  0.3W 25V 150MHz 0.3A
2N3645  0.3W 60V 200MHz 0.5A
2N3702  0.3W 25V 100MHz 0.05A
2N3905  0.625W 40V 200MHz 0.2A
2N3906  0.625W 40V 250MHz 0.2A

Note: Some data are from Alexan electronics

USB Battery Charger for NiCd

                                                      

USB Battery Charger for NiCd

This is a simple charger for nickel-cadmium battery (NiCd) that can be connected in your USB port. The charging scheme employs only a constant current charging. The two NiCd cells are connected in series and charge at 200mA current. Charging current is controlled by zener diode D1 and resistor R1. You can increase or decrease the current by using the approximate equation:
Current = VD1/R1; where VD1 is the zener voltage.
The use of D2 is to limit the voltage across the battery, thus protect it from damage. Charging time of the fully discharged battery is given by the formula:
Time = Battery rating / 200mA ; where Battery rating is in mAH.

Example: battery rating 220mAh;
Time = 2200mAH / 200mA = 11 hours; meaning do not let battery charged more than 11 hours.