Silicon Power Transistor - 2SD1666

The Silicon Power Transistor - 2SD1666 is an NPN silicon power transistor for low-frequency amplifier and general switching circuits. Rated at 60 V and 3 A with 25 W power dissipation, it is found in audio amplifier stages, power supply circuits and driver boards, and it is a useful spare when repairing equipment that uses this part.

Silicon Power Transistor - 2SD1666 Specifications

• Type: NPN silicon bipolar power transistor
• Collector-emitter voltage (VCEO): 60 V
• Collector-base voltage (VCBO): 60 V
• Emitter-base voltage (VEBO): 6 V
• Collector current: 3 A maximum
• Power dissipation: 25 W with the case at 25 °C (heatsink needed)
• DC current gain (hFE): 70 minimum
• Package: isolated TO-220 type

Silicon Power Transistor - 2SD1666 Applications

• Audio power amplifier and driver stages
• Linear power supplies and voltage regulators
• Switching relays, small motors and lamps
• Replacement part for repairing amplifiers and power boards

What's in the Box

• 1 × 2SD1666 NPN power transistor

Tip: Check the pinout with the datasheet or a multimeter before soldering, as it can differ from other TO-220 parts. Fit a heatsink whenever the transistor dissipates more than a watt or two, and keep the collector current below 3 A.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.