1. Device Overview:

️· Type: NPN Bipolar Junction Transistor (BJT)
️· Application: Designed for switching and amplification applications.
️· Package: SOT-323

2. Key Electrical Characteristics (Typical @ 25°C unless otherwise noted):

️· Collector-Emitter Voltage (Vce): Up to 40V
️· Collector-Base Voltage (Vcb): Up to 50V
️· Emitter-Base Voltage (Veb): Typically 0.7V
️· Collector Current (Ic): 1A max
️· Power Dissipation (Pd): 200mW
️· Gain (hFE): Ranges significantly (see graphs and table in datasheet).

3. Detailed Electrical Specifications (From Tables & Notes):

️· DC Current Gain (hFE): The datasheet presents this data in graphs (Fig. 3).
️· Saturation Voltage (Vce(sat)): Typically below 0.5V
️· Transition Frequency (fT): Measured with the gain bandwidth product.
️· Input Impedance
️· Output Impedance
️· Noise Figure

4. Graphs and Curves:

The datasheet contains several important graphs that show the device’s behavior:

️· Fig. 4: Base Emitter Voltage vs. Collector Current: Shows how the voltage between the base and emitter changes based on current flow.
️· Fig. 2: Collector-Emitter Saturation Voltage vs. Collector Current: Illustrates the saturation voltage at different collector currents.
️· Fig. 5: Gain Bandwidth Product vs. Collector Current: Shows the frequency response of the transistor as a function of collector current.
️· Fig. 1: Collector characteristics

5. Marking Information:

️· K1D: Product Type Marking Code
️· YM: Date Code (Year and Month)
️· Date code keys provided for deciphering the date of manufacture.

6. Packaging and Ordering Information:

️· Packaging: Available in SOT-323 package
️· Quantity: 3000 units per reel.

7. Important Notes and Disclaimers:

️· Green Molding Compound: Newer devices use environmentally friendly molding compounds.
️· Life Support Applications: Requires written approval for use in life support systems.
️· Disclaimers: Standard legal disclaimers regarding product changes, liability, and use in critical applications.

To effectively use this datasheet, you would need to:

️· Refer to the graphs: Pay close attention to the graphs depicting hFE and gain bandwidth product for specific operating conditions.
️· Consider application requirements: Select the device based on specific voltage, current, and frequency needs.