About Transistors

Transistors

A transistor is a semiconductor device that is commonly used to amplify or switch electronic signals. It consists of three terminals, normally referred to as the emitter, base and collector. The transistor operates in four main states: cutoff, forward active, reverse active and saturation. It acts as an electrical switch when forward biased, meaning a current is allowed to flow between the two terminals. When it is reverse biased, meaning the current flows in the opposite direction, the device is turned off. Transistors are used in amplifying circuits to amplify voltage, current, or even power. They are also used in digital logic circuits to switch between two or more stable states.

Transistors

Bipolar Transistors - BJT

Bipolar Transistors - Pre-Biased

Darlington Transistors

Digital Transistors

GaN FETs

IGBT Modules

IGBT Transistors

IGBTs

JFETs

MOSFETs

RF Transistors

SiC MOSFETs

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Image	Stock Code(▲▼)	Description	Manufacturer	Availability ⓘ (▲▼)	Price(AUD) (Ex. GST)(▲▼)	Enter Qty

MMBTA42

Transistors (NPN/PNP) SOT-23 RoHS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

SLKORMICRO

2522
Ships to you
between Fri. 03 Jul to Wed. 08 Jul

July 2026

July 2026
	S	M	T	W	T	F	S
27	28	29	30	1	2	3	4
28	5	6	7	8	9	10	11
29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0183

Multiples of: 20

KY2004K

SOT-23 MOSFETs ROHS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Kang Yang

2522
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between Fri. 03 Jul to Wed. 08 Jul

July 2026

July 2026
	S	M	T	W	T	F	S
27	28	29	30	1	2	3	4
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29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0206

Multiples of: 20

DTC143XUAT106

Transistors Switching - Resistor Biased NPN 50V 100MA SOT-323
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ROHM

2522
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July 2026

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31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0208

Multiples of: 20

MMST3904

40V 200mW 60mA SOT-323 Bipolar Transistors - BJT ROHS
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LGE

2522
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July 2026

July 2026
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30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.022

Multiples of: 20

FS2301 A1

SOT-23-3L MOSFETs ROHS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

FOSAN

2522
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July 2026

July 2026
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29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0204

Multiples of: 20

BC849C-AQ

Bipolar Transistors - BJT Bipolar Transistor, SOT-23, 30V, 100mA, NPN
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Diotec

2522
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between Fri. 19 Jun to Thu. 25 Jun

June 2026

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26	21	22	23	24	25	26	27
27	28	29	30	1	2	3	4
28	5	6	7	8	9	10	11

AUD 0.024

Multiples of: 25

SP3415KT1

SOT-23-3L MOSFETs ROHS
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Siliup

2522
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July 2026

July 2026
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29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0245

Multiples of: 20

MMBTSA1504G

TO-236 Bipolar Transistors - BJT ROHS
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Semtech

2522
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July 2026

July 2026
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29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0282

Multiples of: 20

TNM03K20FX

20V 500mA 6V 1PCSNChannel SOT-523 MOSFETs ROHS
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Shenzhen JingYang

2522
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between Fri. 03 Jul to Wed. 08 Jul

July 2026

July 2026
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27	28	29	30	1	2	3	4
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29	12	13	14	15	16	17	18
30	19	20	21	22	23	24	25
31	26	27	28	29	30	31	1
32	2	3	4	5	6	7	8

AUD 0.0301

Multiples of: 20

S9013W

Transistors (NPN/PNP) NPN 500mA 25V SOT-323 (SC-70) RoHS
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Changjing Electronics Technology

1940
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between Fri. 03 Jul to Wed. 08 Jul

July 2026