Bipolar Junction Transistors (BJTs) are fundamental semiconductor devices widely used in electronics for amplification and switching applications. Comprising three layers of doped material, BJTs come in two types—NPN and PNP—and operate by controlling the flow of current through their base terminal. Known for their versatility, BJTs play a critical role in analog circuits, such as audio amplifiers, and in digital systems, as reliable switches. In this article, everything PE has listed some interesting BJTs that were trending on the website in 2024.
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-40 V PNP Silicon Transistor
The MMS9012-H-TP from Micro Commercial Components is a PNP Silicon Transistor. It has a collector-emitter breakdown voltage of -40 V, an emitter-base voltage of up to -5 V, and a saturated collector-emitter voltage of less than -0.6 V. This RoHS-compliant transistor is available in a surface-mount package that measures 2.8 x 2.1 x 0.9 mm. Read more.
120 V Silicon NPN Bipolar Transistor
The TTC023 from Toshiba is a Silicon NPN Bipolar Transistor that has been designed for high-speed switching and DC-DC converter applications. It has a collector-emitter breakdown voltage of over 120 V, a base-emitter voltage of up to 7 V, and a collector-emitter saturation voltage of less than 0.19 V. It is available in a surface-mount package that measures 6.5 x 5.5 x 2.3 mm. Read more.
80 V Complementary Silicon PNP Transistor
The 2N6491G from onsemi is a Complementary Silicon PNP Transistor that has been designed for use in general−purpose amplifiers and switching applications. It has a collector-emitter voltage of over 80 V, a base-emitter voltage of up to 5 V, and a collector-emitter saturation voltage of less than 1.3 V. This RoHS-compliant transistor is available in a plastic-encapsulated surface-mount package. Read more.
30 V NPN Transistor for Small Signal Applications
The KTC3265-Y from SeCoS Corporation is an NPN Small Signal Transistor that has been encapsulated with plastic. It has a collector-emitter breakdown voltage of over 30 V, an emitter-base voltage of up to 5 V, and a saturated collector-emitter voltage of less than 0.5 V. This RoHS-compliant transistor is available in a surface-mount package that measures 2.80 x 2.10 mm. Read more.
Dual PNP Switching Transistor
The MMDT2907AQ from PANJIT Semiconductor is a Dual PNP Switching Transistor. It has a collector-emitter breakdown voltage of over -60 V, a base-emitter voltage of up to -5 V, and a collector-emitter saturation voltage of less than -0.4 V. This RoHS-compliant planar transistor is available in a surface-mount package that measures 2.2 x 1.35 x 1 mm. Read more.
65 V NPN Bipolar Junction Transistor for Switching Applications
The BC546A from Diotec Semiconductor is an NPN Bipolar Junction Transistor that is ideal for signal processing, switching, and amplification applications. It has a collector-emitter breakdown voltage of over 65 V, a base-emitter voltage of 660 mV, and a collector-emitter saturation voltage of less than 200 mV. This RoHS-compliant transistor is available in a through-hole package that measures 17.1 x 4.6 mm. Read more.
Planar-Type PNP Transistor for Power Management Applications
The STN790A from STMicroelectronics is a PNP Transistor that is ideal for power management, voltage regulation in bias supply circuits, switching regulators in battery chargers, and heavy load driver applications. It has a collector-emitter breakdown voltage of -30 V, an emitter-base voltage of up to -5 V, and a saturated collector-emitter voltage of less than -0.15 V. This transistor is available in a surface-mount package that measures 6.3 x 6.7 mm. Read more.
45 V NPN Medium Power Transistor
The BC54PAS-Q Series from Nexperia are AEC-Q101 Qualified NPN Medium Power Transistors that have been designed for automotive applications. They have a collector-emitter breakdown voltage of up to 45 V, an emitter-base voltage of up to 5 V, and a saturated collector-emitter voltage of less than 500 mV. They are available in a surface-mount package that measures 2 x 2 mm and are ideal for linear voltage regulators, battery-driven devices, MOSFET drivers, high-side switches, power management, and amplifier applications. Read more.
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Note: This list has been compiled based on user activity on everything PE. To ensure that we cover the whole range of BJTs we limited the number of products from each category and company. The listed products are shown in random order and are grouped by category.
