D1649 Transistor – 800V, 2.5A, NPN, Datasheet, PDF, 2SD1649

Part Number: D1649, 2SD1649

Function: 800V, 2.5A, NPN Silicon Transistor

Package: TO3PML type

Manufacturer: Sanyo

Images:D1649 pdf pinout


D1649 is 800V, 2.5A, NPN Triple Diffused Planar Silicon Transistor. A NPN transistor is a type of bipolar junction transistor (BJT) that consists of two n-type semiconductor materials separated by a single p-type material.

The NPN transistor is used to amplify or switch electronic signals and is widely used in many electronic circuits. It works by controlling the current flow between the collector and emitter terminals through the base terminal.

When a small current is applied to the base, it controls a much larger current between the collector and emitter, making the NPN transistor an effective amplifier or switch.

Characteristics of NPN Transistors:

1. Bipolar Junction: NPN transistors are bipolar junction transistors (BJT), meaning they have a structure consisting of three regions of alternating P-type and N-type semiconductors.

2. Current Amplification: NPN transistors are designed to amplify electrical current, and can be used in a wide range of electronic applications such as amplifiers, switches, and oscillators.

3. Forward Biased: In order to operate, the base-emitter junction of an NPN transistor must be forward biased, meaning that the base must be connected to a positive voltage relative to the emitter.


1. Fast speed

2. High reliability ( Vcbo = 1500 V )

3. High breakdown voltage

D1649 datasheet

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 1500 V

2. Collector to Emitter Voltage: Vceo = 800 V

3. Emitter to Base Voltage: Vebo = 6 V

4. Collector Current: Ic = 2. 5A

5. Collector Dissipation : Pc = 50 W ( Tc=25°C )

6. Junction Temperature: Tj = 150°C

7. Storage Temperature: Tsg = -55 ~ +150°C


1. High-voltage, Power switching

D1649 PDF Datasheet

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