BD311 Transistor NPN 10A 60V

Heavy-Duty BD311 NPN Transistor for High-Power Applications

The BD311 Transistor functions as a high-performance NPN Silicon Power BJT specifically designed for demanding switching and linear amplification tasks. Housed in the classic, rugged TO-3 metal-can package, this device is built to survive in environments where standard plastic transistors would fail. Engineers and industrial technicians consistently select the BD311 for high-wattage power supplies, DC motor speed controllers, and professional audio power stages.

Massive 10-Ampere Current Handling and Power Efficiency

Specifically, the BD311 manages a continuous collector current ($I_C$) of up to 10A. This exceptional capacity allows the device to control high-power loads such as heavy-duty industrial solenoids, large-scale lighting arrays, and high-torque DC motors. Furthermore, the transistor handles a collector-emitter voltage ($V_{CEO}$) of up to 60V. This rating provides a substantial safety margin for 12V, 24V, and 36V DC power rails, protecting the semiconductor against voltage spikes and inductive back-EMF. Moreover, its low saturation voltage ensures high energy efficiency by minimizing internal power loss during full conduction. Transitioning to the BD311 ensures your power management system remains robust and reliable under maximum load conditions.

Professional TO-3 Metal Case and Thermal Management

Additionally, the BD311 utilizes the legendary TO-3 “diamond” metal package. This design is engineered for maximum heat dissipation, allowing the transistor to handle a total power dissipation ($P_{tot}$) of up to 117W when properly mounted to an appropriately sized heat sink. Specifically, the hermetic metal seal protects the silicon die from moisture, dust, and mechanical stress.

Moreover, technicians frequently install the BD311 in the output stages of high-power public address (PA) systems and laboratory-grade linear regulators. Specifically, its high DC current gain ($h_{FE}$) and excellent linearity across the current range ensure that large signals are amplified with high fidelity and minimal harmonic distortion. Furthermore, because it features NPN polarity, it serves as the ideal low-side switch for ground-referenced power control. Additionally, the component is the NPN complement to the BD312 PNP transistor. Using these two together allows for the creation of massive, high-efficiency push-pull power amplifier configurations.

Verified Data Sheet (Technical Specifications)