BD135 Transistor NPN 1.5A 45V
14,64 EGP
High-Performance BD135 NPN Transistor for Power and Audio
The BD135 Transistor functions as a highly versatile NPN Silicon Bipolar Junction Transistor (BJT) specifically designed for medium-power applications. It is a staple in the electronics industry, favored for its balance of current handling and compact size. Engineers and hobbyists consistently select the BD135 for its ability to bridge the gap between small-signal transistors and bulky power devices in both switching and linear circuits.
Balanced 1.5-Ampere Performance and Efficiency
Specifically, the BD135 manages a continuous collector current ($I_C$) of up to 1.5A. This capacity allows the device to drive loads such as medium-sized DC motors, powerful relays, and LED arrays with ease. Furthermore, the transistor handles a collector-emitter voltage ($V_{CEO}$) of up to 45V. This rating provides a safe and stable operating margin for 12V and 24V DC power rails. Moreover, its low saturation voltage ensures high energy efficiency by minimizing heat generation during full conduction. Transitioning to the BD135 ensures that your control circuit remains compact without sacrificing the ability to drive significant power.
Versatile TO-126 Package and Thermal Reliability
Additionally, the BD135 utilizes the industry-standard TO-126 (SOT-32) package style. This design features a convenient central mounting hole, which allows you to attach the transistor directly to a heat sink for improved thermal management. Specifically, when properly cooled, the device can dissipate up to 12.5W of power. Consequently, it serves as an excellent driver for larger power transistors or as an output stage for small audio amplifiers.
Moreover, technicians frequently install the BD135 in linear voltage regulators and solenoid control modules. Specifically, its DC current gain ($h_{FE}$) remains linear across a wide range of currents, ensuring predictable performance in analog designs. Furthermore, because it features NPN polarity, it integrates seamlessly into standard ground-referenced switching configurations. Additionally, the component is the NPN complement to the BD136 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 ($V_{CEO}$) | 45V |
| Collector-Base Voltage ($V_{CBO}$) | 45V |
| Emitter-Base Voltage ($V_{EBO}$) | 5V |
| Collector Current ($I_C$) | 1.5A |
| Peak Collector Current ($I_{CM}$) | 3.0A |
| Total Power Dissipation ($P_{tot}$) | 1.25W (Free Air) / 12.5W (with Heat Sink) |
| DC Current Gain ($h_{FE}$) | 40 to 250 |
| Transition Frequency ($f_T$) | 190 MHz (Typical) |
| Package Type | TO-126 (SOT-32) |
