Sot 126

Updated July 3, 2026

Overview

Product sourcing insights & recommendations

27 来源

The phrase 'SOT-126' primarily refers to a standard semiconductor package for power transistors, commonly known as TO-126 or SOT-32. This package is widely used for medium-power applications due to its rectangular plastic body with a central mounting hole for heat sink attachment Wikipedia Bdtic.

Product Overview

* Package Specifications: SOT-126 is characterized by its three pins and a typical weight of 0.64g Bdtic. It is frequently used for Bipolar Junction Transistors (BJTs) and MOSFETs in audio amplifiers and general-purpose switching Wikipedia Onsemi.

* Common Models: Popular transistors in this form factor include the BD139/BD140 (NPN/PNP pair), MJE340/MJE350, and 2SD882 series Alibaba Alibaba Alibaba.

* Pricing & Sourcing: In the current B2B market, unit prices for common SOT-126 components range from $0.06 to $0.60, with MOQ starting as low as 1 piece for stock items from major electronics hubs like Shenzhen Alibaba Alibaba.

Market Trends & Insights (2026 Outlook)

* Steady Market Growth: The global power transistor market is projected to reach approximately $16.07 billion in 2026, driven by high demand in EV powertrains, AI data centers, and renewable energy infrastructure Fortunebusinessinsights Snsinsider.

* Technological Shift: While legacy Silicon BJTs (common in SOT-126) still hold a large volume share (~41%), there is a rapid shift toward Wide-Bandgap (WBG) materials like SiC and GaN Snsinsider Yolegroup.

* Packaging Evolution: Innovation is moving from the die to the package. Trends for 2026 include top-side cooling and copper clip interconnects to manage the extreme heat generated by modern high-density power devices Yolegroup.

* Regional Dominance: The Asia-Pacific region (particularly China) remains the dominant manufacturing and packaging hub, accounting for nearly 40% of the global market share Yolegroup.

Detailed sourcing lists for BD139/BD140 and MJE series transistors are included in the files below.

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Sources & References

27 sources cited · Verified industry data & reports

TO-126

Wikipedia

TO-126 is a type of semiconductor package for devices with three pins, such as transistors. the package is numbered as TO-225AA. this package style as SOT-32. ...

Package Outline Dimensions

Diodes Incorporated

Package Outline Dimensions Page 1 ALL DIMENSIONS ARE NOMINAL VALUES. Package Outline Dimensions TO126 TO126 Dim Min Max Typ A 2.400 2.900. All ...

TO-126 NPN Transistors

Farnell

TO126. Plastic Package. 1. Emitter. 2. Collector. 3. Base. Dimensions. Minimum. Maximum. A. 7. 2. 8.38. B. 10.16. 11.43. C. 2.29. 3.04. D. 0.64. 0.88. E. 2.040.

SOT-32 (TO-126) - BDTIC

bdtic.com

SOT-32 (TO-126) PACKAGE & PACKING INFORMATION FOR BIPOLAR TRANSISTORS Page 1 DIMENSIONS REF. Weight: 0.64g (TYP.)

TO-126

Renaissance Electronics

TO-126 Packing Information Standard: Bulk Devices are bulk packed in white corrugated box with black conductive coating (surface resistivity of <105 ohms per ...

Package Transistors

DigiKey

The products listed in this document are designed to be used with ordinary electronic equipment or devices. (such as audio visual equipment, ...

Sot 126

Overview

Product Overview

Market Trends & Insights (2026 Outlook)

Sot 126 Transistor Bd139 Bd140

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Sources & References