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Tuesday, May 21 Week 21

Transistors

A transistor is basically an electronic switch.
Used for analog and digital purpose, and works for both DC and AC power.
Mosfets is certainly best for heavier loads while regular transistors can be used for smaller loads.

NPN-transistors reacts to positive and opens for negative current,
and PNP-transistors reacts to negative and opens for positive current.
Transistors are widely used to convert voltages, and to invert between plus and minus when needed.
Transistors are also used for amplification and regulating voltage by a signal input.

B: Base (signal)
C: Collector (output power)
E: Emitter (input power)

Transistors on DC


Emitter-pin of NPN-transistor is connected to ground.
Then a low positive voltage through a resistor R on the base-pin controls the amount of ground on the collector-pin.

Emitter-pin of PNP-transistor is connected to positive voltage.
Then ground through a resistor R on the base-pin controls the amount of positive voltage on the collector-pin.

Optionally on both types of transistors (NPN/PNP) a pull-down-resistor R2 can be used,
to ensure the transistor if fully pulled down, when no signal on the base-pin.

Various transistors for general purpose

1. BC547 NPN
2. BC557 PNP
3. BD135 NPN
4. BD136 PNP
5. NEC D882 NPN
6. NEC B772 PNP
7. C3181N NPN
8. A1264N PNP
9. SK C4468 NPN
10. SK A1695 PNP
11. Sanyo D1065 NPN
12. SK A1106 PNP
13. SK C2581 NPN
14. SK C5100 NPN
15. SK B1587 PNP
16. TIP147 PNP
17. IRF540 MOSFET NPN

BC547 NPN


BC557 PNP


BD135 NPN


BD136 PNP


NEC D882 NPN


NEC B772 PNP


C3181N NPN

Datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/736702/JMNIC/2SC3181N_15.html

A1264N PNP

Datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/263117/ISC/2SA1264N.html

SK C4468 NPN

Datasheet: https://www.semicon.sanken-ele.co.jp/sk_content/2sc4468_ds_en.pdf

SK A1695 PNP

Datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/37929/SANKEN/2SA1695.html

Sanyo D1065 NPN

Datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/38790/SANYO/2SD1065.html

SK A1106 PNP

Datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/273328/SAVANTIC/2SA1106.html

SK C2581 NPN

Datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/33594/WINGS/2SC2581.html

SK C5100 NPN

Datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/38025/SANKEN/2SC5100.html

SK B1587 PNP

Datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/241944/ETC2/B1587.html

TIP147 PNP

Transys Electronics LTD
Datasheet: http://www.datasheetcatalog.com/info_redirect/datasheets/700/323368_DS.pdf.shtml

IRF540 MOSFET NPN

SGS-Thomson (ST)
Datasheet: http://www.futurlec.com/Transistors/IRF540.shtml

Related pages of Transistor

Resistor color values
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