KSE340STU Offers High-Voltage, Reliable NPN Performance

High-voltage transistor stages need a device that can handle demanding electrical conditions without adding unnecessary complexity. The KSE340STU is an onsemi NPN epitaxial silicon transistor designed for high-voltage general-purpose applications. It carries a 300 V collector-emitter breakdown rating and supports collector currents up to 500 mA.

The KSE340STU comes in a TO-126-3 through-hole package with a 20 W maximum power rating. Its 5 V emitter-base voltage rating and 30 minimum DC current gain at 50 mA and 10 V make it suitable for compatible switching, amplification, and driver circuits. The device can also support transformer-related applications, as noted in the manufacturer’s datasheet. It operates with a junction temperature rating of up to 150°C.

The KSE340STU is now marked obsolete, so sourcing the exact part can matter when maintaining older equipment or established designs. Need the KSE340STU for existing repair requirements? Contact Florida Circuit today for pricing, availability, and sourcing assistance.