Built-in circuit elementnpn
NPN transistor
NPN bipolar transistor (2N3904) for switches and amplifiers.
Key data
- Category
- Semiconductors
- Simulation model
- Built-in circuit element
- Reference prefix
- Q
- Pins
- 3
- Land pattern
- TO-92_Inline
Simulation model
Ebers-Moll transport model with Early effect and junction capacitances. The type selects the SPICE model card.
- Primitive
- Q
Model cards
| IS | 6.734e-15 |
|---|---|
| BF | 416.4 |
| BR | 0.7371 |
| VAF | 74.03 |
| CJE | 4.493e-12 |
| CJC | 3.638e-12 |
Pins 3
| Pin | Name | Use |
|---|---|---|
| C | CPassive pin | Collector: to the load (the load goes to the supply) |
| B | BPassive pin | Base: driven through a base resistor (e.g. 1–10 kΩ) |
| E | EPassive pin | Emitter: to GND (low-side switch) |
Parameters 1
Type
modelDefaultQ2N3904
Q2N3904
PCB
Verified land pattern
TO-92_Inline