2N5551A NPN High-Voltage Transistor TO-92
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Prices updated: 13 Oct 2026
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About this product
The 2N5551A is a high-voltage NPN general-purpose transistor in a TO-92 plastic package. It is used in switching, driver and small-signal amplifier circuits where a higher collector-emitter voltage rating than common small-signal NPN types is needed.
Specifications
- Transistor type
- NPN high-voltage general purpose
- Package
- TO-92 plastic
- Max collector current (IC)
- 600 mA
- Max power dissipation (Ptot)
- 625 mW
Frequently asked questions
How does the 2N5551A compare with the BC547?
The 2N5551A has a higher collector-emitter voltage rating and a higher collector current rating than the BC547, which is a low-voltage small-signal NPN. Choose the 2N5551A when the circuit voltage is above the BC547 limit.
Is the pinout the same as other TO-92 transistors?
Pin arrangement varies between manufacturers and part families, so verify the emitter, base and collector pins in the datasheet before wiring the transistor.
