BU941RP NPN Power Transistor 400V 15A 155W SOT-199
The BU941RP NPN Power Transistor 400V 15A 155W SOT-199 is a high-performance silicon transistor designed for power switching and amplification applications. It features a high collector-emitter voltage of 400V and a collector current capacity of 15A, making it ideal for use in motor control, power supply circuits, and high-voltage switching systems. With a maximum power dissipation of 155W, this transistor ensures reliable operation under demanding conditions. Encased in a robust SOT-199 (ISOWATT218) package, the BU941RP offers excellent thermal performance and durability, suitable for industrial and consumer electronic applications requiring efficient and stable power handling.
Features
- High voltage capability up to 400V for reliable high-power applications.
- High collector current of 15A ensures strong load-driving capacity.
- Maximum power dissipation of 155W for excellent thermal performance.
- Fast switching speed for efficient operation in switching circuits.
- Low saturation voltage (Vce(sat)) reduces power loss and heat generation.
- Isolated SOT-199 (ISOWATT218) package for improved heat dissipation and easy mounting.
- Suitable for motor drivers, power amplifiers, and SMPS (switch-mode power supplies).
- High reliability and long operational lifespan under demanding conditions.
Pin Configuration
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | Base (B) | Control terminal for transistor operation |
| 2 | Collector (C) | Main current-carrying terminal (connected to case) |
| 3 | Emitter (E) | Output terminal for current flow |
Specifications
| Parameter | Value | Unit | Description |
| Transistor Type | NPN | – | (BJT) Bipolar junction power transistor |
| Datasheet | BU941RP | ||
| Collector-Emitter Voltage (Vceo) | 400 | V | Maximum voltage between collector and emitter |
| Collector-Base Voltage (Vcbo) | 400 | V | Maximum voltage between collector and base |
| Emitter-Base Voltage (Vebo) | 5 | V | Maximum voltage between emitter and base |
| Collector Current (Ic) | 15 | A | Maximum continuous collector current |
| Power Dissipation (Ptot) | 155 | W | Maximum power handling capability |
| DC Current Gain (hFE) | 8 – 40 | – | Current gain range at specified test conditions |
| Collector-Emitter Saturation Voltage (Vce(sat)) | 1.5 | V | at Ic = 8A, Ib = 1.6A |
| Transition Frequency (fT) | 4 | MHz | frequency response |
| Operating Junction Temperature (Tj) | -65 to +150 | °C | Safe operating temperature range |
| Package Type | SOT-199 (ISOWATT218) | – | Insulated power package for efficient heat dissipation |
Mechanical Dimensions
Applications
- Switching power supplies (SMPS) and DC-DC converters.
- Motor control circuits and industrial drive systems.
- Audio power amplifiers and high-power output stages.
- Inverter and converter circuits for power management.
- Relay and solenoid drivers requiring high current capability.
- Lighting control and dimming systems for high-voltage LEDs.
- Uninterruptible power supplies (UPS) and backup systems..
- General-purpose high-voltage switching in industrial electronics.
Package Contents
- 1 x BU941RP NPN Power Transistor 400V 15A 155W SOT-199
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