Details

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BUY BF420 https://www.utsource.net/itm/p/12591180.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Collector-Emitter Voltage	VCE	-	-	30	V	Maximum voltage between collector and emitter with base open
Emitter-Base Voltage	VEB	-5	-	5	V	Maximum reverse voltage between emitter and base
Collector-Base Voltage	VCB	-	-	30	V	Maximum voltage between collector and base with emitter open
Collector Current	IC	-	-	100	mA	Maximum continuous collector current
Power Dissipation	PT	-	-	625	mW	Maximum power dissipation at TA = 25°C
DC Current Gain	hFE	100	300	700	-	DC current gain (IC = 10 mA, VCE = 10 V)
Transition Frequency	fT	-	150	-	MHz	Frequency at which hfe = 1 (IC = 10 mA, VCE = 10 V)
Storage Temperature	TSTG	-55	-	150	°C	Temperature range for storage and operation
Junction Temperature	TJ	-	-	150	°C	Maximum junction temperature

Instructions for Use:

1. Handling Precautions:

   • Avoid exposing the device to temperatures outside the specified operating range.
   • Use proper anti-static precautions to prevent damage from electrostatic discharge (ESD).

2. Mounting:

   • Ensure that the device is securely mounted to the PCB to minimize mechanical stress.
   • Use a heat sink if the device will operate near its maximum power dissipation.

3. Biasing:

   • Ensure that the base-emitter voltage (V_BE) is within the specified limits to avoid damaging the device.
   • Use appropriate biasing circuits to maintain stable operation over temperature and supply voltage variations.

4. Operating Conditions:

   • Do not exceed the maximum ratings listed in the table, as this can lead to device failure.
   • Monitor the junction temperature to ensure it does not exceed the maximum allowable value.

5. Testing:

   • Use a transistor tester or a multimeter to verify the device parameters before installation.
   • Test the device under actual operating conditions to ensure it meets the required performance specifications.

6. Storage:

   • Store the device in a dry, cool place to prevent moisture damage.
   • Keep the device in its original packaging until ready for use to protect against static and physical damage.

(For reference only)