BD135 NPN Bipolar Medium Power Transistor 45V 1.5A TO-126 Package

BD135 NPN Bipolar Medium Power Transistor 45V 1.5A TO-126 Package

The BD135 is a medium-power NPN silicon transistor designed for general-purpose amplification and switching applications. With a collector-emitter voltage of 45V and a collector current of up to 1.5A, it delivers excellent current handling capability, low saturation voltage, and stable performance over a wide range of operating conditions.

Encased in a TO-126 package, the BD135 offers enhanced heat dissipation compared to smaller transistors, making it ideal for medium-power amplifiers, voltage regulators, and motor drivers. It’s a reliable choice for both industrial and hobbyist applications requiring efficiency and durability in medium-current circuits.

Click here to view related products

Features:

• Transistor Type: NPN Silicon
• Package: TO-126 (enhanced thermal capability)
• Collector-Emitter Voltage (V_CE): 45V
• Collector Current (I_C): 1.5A
• Power Dissipation (P_tot): Up to 12.5W (with proper heat sinking)
• DC Current Gain (hFE): 40–250 (typical, varies with current)
• Low Saturation Voltage: Improves efficiency in switching applications
• High Reliability: Ensures stable performance over long-term use
• Good Thermal Performance: Ideal for medium-power applications
• RoHS Compliant: Environmentally safe design

Applications:

• Audio Amplifiers: Used in driver and output stages of medium-power amplifiers
• Voltage Regulators: Provides stable voltage and current control
• Relay & Motor Drivers: Controls small motors, solenoids, and relays effectively
• Signal Switching: Suitable for switching loads in electronic control circuits
• Power Control Circuits: Reliable in moderate power handling applications
• Industrial & Hobby Projects: Commonly used in prototypes and educational kits

bd135-transistor-datasheet

* Product image for illustration purposes only, actual product may vary.