BUW12A NPN Power Transistor 1000V 8A TO-3PN
The BUW12A is a silicon NPN power transistor designed for high-voltage and high-current switching applications. Built in a TO-3PN package, this transistor provides reliable performance in demanding electronic circuits that require efficient power handling and fast switching characteristics. The device is capable of operating with collector-emitter voltages up to 1000V and collector currents up to 8A, making it suitable for industrial-grade designs.
This transistor features low collector saturation voltage and fast switching performance, helping improve efficiency and reduce power loss in switching applications. The BUW12A is specially intended for industrial applications such as switch-mode power supplies, high-voltage converters, inductive load control, and power regulation systems.
Features:
- High-voltage switching capability.
- Fast switching performance.
- Low saturation voltage design.
- Suitable for industrial applications.
- High power dissipation capability.
- Excellent switching characteristics.
- Robust TO-3PN package.
- Designed for high-current operation.
- Reliable performance under demanding operating conditions.
Specifications:
| Parameter | Value |
|---|---|
| Transistor Type | NPN Power Transistor |
| Package | TO-3PN |
| Collector-Base Voltage (VCBO) | 1000V |
| Collector-Emitter Voltage (VCEO) | 450V |
| Emitter-Base Voltage (VEBO) | 9V |
| Continuous Collector Current (IC) | 8A |
| Peak Collector Current (ICM) | 20A |
| Base Current (IB) | 4A |
| Power Dissipation (PT) | 125W |
| Junction Temperature | 150°C |
| Storage Temperature | -65°C to +175°C |
| Thermal Resistance (Junction-to-Case) | 1.2°C/W |
| Collector-Emitter Saturation Voltage (VCEsat) | 1.5V |
| Base-Emitter Saturation Voltage (VBEsat) | 1.5V |
| DC Current Gain (hFE) | 15 to 50 |
| Turn-On Time | 1.0µs |
| Storage Time | 4.0µs |
| Fall Time | 0.8µs |
Pinout:
| Pin | Description |
|---|---|
| 1 | Base |
| 2 | Collector (Connected to mounting base) |
| 3 | Emitter |
Applications:
- Industrial control systems.
- Switch-mode power supplies.
- High-voltage switching circuits.
- Power converters.
- Inverters.
- Motor drive circuits.
- Inductive load switching.
- Electronic ballasts.
- Power regulation circuits.
Package Includes:
- 1 × BUW12A NPN Power Transistor 1000V 8A TO-3PN.


