940 Transistor Pinout

The 940 transistor (commonly known as the 2SA940 or KSA940) is a PNP power transistor typically housed in a TO-220 package UtmelOnsemi. It is widely used in high-voltage and medium-power applications, particularly in vertical deflection circuits for CRT monitors and audio power amplifiers ProjectpointOnsemi.

Technical Specifications & Pinout

Looking at the front of the transistor with the pins pointing downward:

• Pin 1: Base (Control terminal)
• Pin 2: Collector (Connected to the metal mounting tab)
• Pin 3: Emitter (Output terminal)

Maximum Ratings:

• Collector-Emitter Voltage ($V_{CEO}$): -150V
• Collector Current ($I_C$): -1.5A
• Collector Dissipation ($P_C$): 25W OnsemiUtmel

Market Trends & Insights

The power transistor market is projected to reach approximately $20.73B to $22.63B by 2026 PrecedenceresearchMordorintelligence. Key insights include:

• Wide-Bandgap (WBG) Transition: While silicon-based BJTs like the A940 remain staple components for legacy and low-cost applications, the broader market is shifting toward SiC (Silicon Carbide) and GaN (Gallium Nitride) for higher efficiency Mordorintelligence.
• Growth Drivers: Electrification in the automotive (EV) and renewable energy sectors is driving demand for robust power handling components SnsinsiderMordorintelligence.
• Regional Dominance: Asia-Pacific continues to lead global demand, accounting for over 50% of the market share due to massive consumer electronics and EV production hubs Mordorintelligence.

Sourcing Information

I have identified numerous verified suppliers for the 2SA940 and KSA940 transistors, primarily located in China's electronics manufacturing hubs. Detailed supplier profiles, including annual revenue, customization options, and product lists, are available in the files below.