BD131 Transistor NPN 70V 3A
11,72 EGP
High-Current BD131 NPN Transistor for Power and Audio Driver Stages
The BD131 Transistor functions as a high-performance NPN Silicon Bipolar Junction Transistor (BJT) specifically designed for medium-power applications. It is widely recognized for its versatility in both switching and linear amplification. Engineers and hobbyists consistently select the BD131 for its ability to handle significant current while maintaining a compact, easy-to-mount form factor.
Robust 3-Ampere Performance and Voltage Durability
Specifically, the BD131 manages a continuous collector current ($I_C$) of up to 3A. This impressive capacity allows the device to drive demanding components such as DC motors, heavy-duty relays, and high-power LED arrays. Furthermore, the transistor handles a collector-emitter voltage ($V_{CEO}$) of up to 70V. This rating provides an excellent safety margin for 12V, 24V, and 48V DC power rails, ensuring stability during inductive kickback or voltage surges. Moreover, its low saturation voltage ensures that minimal power is wasted as heat during full conduction. Transitioning to the BD131 ensures your power management circuit remains efficient and thermally stable under high-load conditions.
Precision Driver Performance and Integration
Additionally, the BD131 utilizes the industry-standard TO-126 (SOT-32) package style. This design features a central mounting hole, allowing you to attach the transistor directly to a heat sink for improved thermal dissipation. Specifically, when properly cooled, the device can dissipate up to 15W of power. Consequently, it serves as an excellent driver for larger power transistors or as an output stage for medium-power audio amplifiers.
Moreover, technicians frequently install the BD131 in linear voltage regulators and solenoid control circuits. Specifically, its DC current gain ($h_{FE}$) remains stable across a wide range of collector currents, ensuring predictable performance in analog designs. Furthermore, because it features NPN polarity, it integrates seamlessly into ground-referenced switching configurations. Additionally, the component is the NPN complement to the BD132 PNP transistor. Using these two together allows for the creation of balanced push-pull amplifier configurations or H-bridge motor controllers.
Verified Data Sheet (Technical Specifications)
| Feature | Specification |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage ($V_{CEO}$) | 70V |
| Collector-Base Voltage ($V_{CBO}$) | 70V |
| Emitter-Base Voltage ($V_{EBO}$) | 5V |
| Collector Current ($I_C$) | 3.0A |
| Peak Collector Current ($I_{CM}$) | 6.0A |
| Total Power Dissipation ($P_{tot}$) | 1.25W (Free Air) / 15W (with Heat Sink) |
| DC Current Gain ($h_{FE}$) | 40 to 250 |
| Transition Frequency ($f_T$) | 60 MHz (Typical) |
| Package Type | TO-126 (SOT-32) |
