Details

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BUY BF998 https://www.utsource.net/itm/p/12608433.html

Parameter	Description	Min	Typ	Max	Unit
VCEO	Collector-Emitter Voltage (Emitter Open)	-	40	-	V
VCBO	Collector-Base Voltage (Emitter Open)	-	50	-	V
VEBO	Emitter-Base Voltage (Collector Open)	-	5	-	V
IC	Continuous Collector Current	-	100	-	mA
IB	Base Current	-	-	10	mA
fT	Transition Frequency	-	300	-	MHz
PT	Total Power Dissipation (TA = 25掳C)	-	350	-	mW
RthJC	Thermal Resistance, Junction to Case	-	150	-	掳C/W
RthJA	Thermal Resistance, Junction to Ambient	-	350	-	掳C/W
TA	Operating Ambient Temperature	-40	-	150	掳C

Instructions for Using BF998:

1. Power Supply:

   • Ensure that the operating voltage does not exceed the maximum ratings of V_CEO, V_CBO, and V_EBO.
   • Use appropriate decoupling capacitors to stabilize the power supply.

2. Current Handling:

   • Do not exceed the maximum continuous collector current (I_C) or base current (I_B).
   • Use heat sinks if the device is expected to dissipate significant power (P_T).

3. Thermal Management:

   • Monitor the junction temperature to ensure it stays within safe limits.
   • Use thermal resistance data (R_thJC and R_thJA) to design effective cooling solutions.

4. Frequency Response:

   • The transition frequency (f_T) indicates the maximum frequency at which the transistor can operate effectively.
   • For high-frequency applications, consider parasitic capacitances and inductances in the circuit layout.

5. Storage and Handling:

   • Store the device in a dry, cool environment.
   • Handle with care to avoid static damage; use ESD protection when handling the device.

6. Mounting:

   • Follow recommended soldering profiles to avoid thermal stress during assembly.
   • Ensure proper mechanical alignment and secure mounting to prevent physical damage.

7. Testing:

   • Use appropriate test equipment and methods to verify the performance parameters.
   • Refer to the datasheet for specific test conditions and procedures.

(For reference only)