Transistors
Amplify or control electric signals. Transistors are often used to boost weak electrical signals or as switches to rapidly control data transmission and computing signals. The transistor's leads are ordered from left to right with the flat side facing you. The incoming current you intend to control is sent to the emitter (E) for NPN transistors or the collector (C) for PNP transistors. The base (B) controls how much current flows through the transistor. Then current is output to your application through the collector pin for NPN transistors or the emitter pin for PNP transistors.
When you send current to the base, you can control the current flow between the collector and emitter leads. NPN transistors use positive current and voltage at the base to control current flowing from the collector to the emitter. PNP transistors use negative current and voltage at the base to control current flowing from the emitter to the collector.
Maximum current gain is the highest multiplication factor the transistor can boost the current.
For technical drawings and 3-D models, click on a part number.
Max. Voltage | Trade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Current, A | Collector-Emitter | Collector-Base | Emitter-Base | Max. Current Gain | Power Dissipation, W | Lg. | Wd. | Wire Dia. | Size | Number | Transistor Type | Temp. Range, °F | Pkg. Qty. | Pkg. | |
NPN Transistors with EBC Leads | |||||||||||||||
| 0.1 | 45V DC | 50V DC | 5V DC | 1,000 | 0.45 | 3/16" | 3/16" | 0.022" | TO-92 | S9014 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 00000 |
| 0.2 | 40V DC | 60V DC | 6V DC | 400 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N3904 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.2 | 305V DC | 310V DC | 5V DC | 250 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | MPSA42 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.5 | 25V DC | 40V DC | 5V DC | 400 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | S8050 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.6 | 40V DC | 75V DC | 6V DC | 300 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N2222A | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.6 | 160V DC | 180V DC | 6V DC | 300 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N5551 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
NPN Transistors with ECB Leads | |||||||||||||||
| 0.15 | 50V DC | 60V DC | 5V DC | 700 | 0.4 | 3/16" | 3/16" | 0.022" | TO-92 | 2SC1815 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.15 | 50V DC | 60V DC | 5V DC | 700 | 0.4 | 3/16" | 3/16" | 0.022" | TO-92 | 2SC945 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
NPN Transistors with CBE Leads | |||||||||||||||
| 0.1 | 45V DC | 50V DC | 6V DC | 800 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | BC547B | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| 0.8 | 45V DC | 50V DC | 5V DC | 630 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | BC337B | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
PNP Transistors with EBC Leads | |||||||||||||||
| -0.6 | -150V DC | -160V DC | -5V DC | 300 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N5401 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.6 | -60V DC | -60V DC | -5V DC | 300 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N2907A | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.5 | -25V DC | -40V DC | -5V DC | 400 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | S8550 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.2 | -305V DC | -310V DC | -5V DC | 250 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | MPSA92 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.2 | -40V DC | -40V DC | -5V DC | 400 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | 2N3906 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
PNP Transistors with ECB Leads | |||||||||||||||
| -0.15 | -50V DC | -50V DC | -5V DC | 700 | 0.4 | 3/16" | 3/16" | 0.022" | TO-92 | 2SA1015 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.1 | -50V DC | -60V DC | -5V DC | 600 | 0.25 | 3/16" | 3/16" | 0.022" | TO-92 | A733 | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
PNP Transistors with CBE Leads | |||||||||||||||
| -0.8 | -45V DC | -50V DC | -5V DC | 630 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | BC327B | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| -0.1 | -45V DC | -50V DC | -5V DC | 800 | 0.625 | 3/16" | 3/16" | 0.022" | TO-92 | BC557B | Bipolar Junction | -65° to 300° | 25 | 0000000 | 0000 |
| No. of Pieces | Includes | Lg. | Wd. | Wire Dia. | Trade Size | Transistor Type | Temp. Range, °F | Each | |
| 190 | S9014—NPN Transistor with EBC Leads (10 Pieces) 2N3904—NPN Transistor with EBC Leads (10 Pieces) MPSA42—NPN Transistor with EBC Leads (10 Pieces) S8050—NPN Transistor with EBC Leads (10 Pieces) 2N2222A—NPN Transistor with EBC Leads (10 Pieces) 2N5551—NPN Transistor with EBC Leads (10 Pieces) 2SC1815—NPN Transistor with ECB Leads (10 Pieces) 2SC945—NPN Transistor with ECB Leads (10 Pieces) BC547B—NPN Transistor with CBE Leads (10 Pieces) BC337B—NPN Transistor with CBE Leads (10 Pieces) 2N5401—PNP Transistor with EBC Leads (10 Pieces) 2N2907A—PNP Transistor with EBC Leads (10 Pieces) S8550—PNP Transistor with EBC Leads (10 Pieces) MPSA92—PNP Transistor with EBC Leads (10 Pieces) 2N3906—PNP Transistor with EBC Leads (10 Pieces) 2SA1015—PNP Transistor with ECB Leads (10 Pieces) A733—PNP Transistor with ECB Leads (10 Pieces) BC327B—PNP Transistor with CBE Leads (10 Pieces) BC557B—PNP Transistor with CBE Leads (10 Pieces) | 3/16" | 3/16" | 0.022" | TO-92 | Bipolar Junction | -65° to 300° | 0000000 | 000000 |