Introduction
The MJE13009 is a high-voltage NPN bipolar junction transistor (BJT) designed for use in switching power supplies, high-frequency inverters, and horizontal deflection circuits. With its rugged TO-220 package, it provides excellent power handling and thermal stability, making it a preferred choice in industrial and consumer electronics. Its collector-emitter voltage of up to 400V and collector current rating of 12A enable it to handle demanding high-voltage, high-current applications.
This transistor is commonly used in Switch Mode Power Supplies (SMPS), DC-AC inverters, and electronic lighting ballasts, where efficiency and durability are critical. The MJE13009 transistor is valued for its fast switching speed, high breakdown voltage, and ability to sustain high collector current without compromising performance. These properties make it a reliable solution in circuits that demand both high efficiency and long service life.
MJE13009 NPN Power Transistor
Due to its popularity, the MJE13009 NPN power transistor has become a standard component in CRT monitor deflection stages, UPS systems, induction heating circuits, and motor drivers. Its affordability, availability, and strong performance in high-voltage environments have made it a trusted choice for engineers and circuit designers worldwide.
MJE13009 Pinout
Pin Configuration
| Pin# | Pin Name | Pin Description |
|---|---|---|
| 1 | Base (B) | Controls the transistor’s switching operation. |
| 2 | Collector (C) | Current enters the transistor; connected to load. |
| 3 | Emitter (E) | Current exits the transistor; typically grounded. |
Key Features
- High-voltage NPN transistor designed for switching and inverter circuits.
- Excellent thermal stability and rugged TO-220 package.
- Fast switching speed for SMPS and high-frequency applications.
- Capable of handling high collector current up to 12A.
- Reliable performance in industrial and consumer power electronics.
Characteristics
- Transistor Type: NPN
- Package: TO-220
- Collector–Emitter Voltage (Vce): 400V
- Collector–Base Voltage (Vcb): 700V
- Emitter–Base Voltage (Veb): 9V
- Collector Current (Ic): 12A
- Power Dissipation (Pd): 80W
- DC Current Gain (hFE): 15 – 40
- Transition Frequency (fT): 4 MHz (typical)
- Operating and Storage Temperature: -65°C to +150°C
The MJE13009 NPN Power Transistor remains one of the most reliable components for high-voltage, high-current power supply designs, offering efficiency, durability, and cost-effectiveness in both industrial and consumer electronic systems.
More Circuit Layouts
Key Applications of MJE13009 NPN Power Transistor
- Switching Power Supplies (SMPS).
- DC-AC inverters and UPS systems.
- Horizontal deflection circuits in CRT monitors/televisions.
- High-voltage lighting ballasts.
- Motor control and industrial power circuits.
- Induction heating applications.
PNP Complimentary Transistor
The MJE13009 (NPN) does not have a direct PNP complementary transistor in the same series. However, depending on design requirements, MJE350 (PNP) or MJE15033 (PNP) are often used as functional complements in high-voltage circuits.
Equivalent of MJE13009 NPN Power Transistor
- MJE13007 (lower current rating, widely used in SMPS).
- MJE13005 (lower power alternative for lighter loads).
- 2SC2625 (high-voltage NPN transistor with similar applications).
- BUH515 (alternative for CRT and high-voltage switching).
- 2SC1307 (close functional equivalent).
(Pin configuration of some transistors mentioned above may different from MJE13009).
Comparison between MJE13005, MJE13007, and MJE13009
- MJE13005 → Best for low-power switching applications such as CFL drivers and smaller power supplies.
- MJE13007 → A mid-range option, capable of handling 8A current and 80W power, making it the most commonly used in SMPS, inverter circuits, and lighting drivers.
- MJE13009 → A higher-power alternative, with 12A current handling and up to 130W dissipation, suitable for high-power inverters, industrial SMPS, and demanding switching applications.
- Choose MJE13005 for small/low-power designs.
- Choose MJE13007 for balanced performance in medium-power designs.
- Choose MJE13009 for high-power, industrial-grade designs.
Datasheet of MJE13009 NPN Power Transistor
Click the following Button to download the datasheet of MJE13009 Transistor :
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