Details

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BUY 2N4991 https://www.utsource.net/itm/p/12616516.html

Parameter	Symbol	Min	Typ	Max	Unit
Collector-Emitter Voltage	VCEO	-	-	30	V
Collector-Base Voltage	VCBO	-	-	50	V
Emitter-Base Voltage	VEBO	-	-	5	V
Collector Current	IC	-	-	200	mA
Base Current	IB	-	-	20	mA
Power Dissipation	PD	-	-	625	mW
Transition Frequency	FT	-	400	-	MHz
Storage Temperature Range	TSTG	-65	-	150	掳C
Operating Temperature Range	TJ	-65	-	150	掳C

Instructions for Use:

1. Handling Precautions: The 2N4991 is sensitive to electrostatic discharge (ESD). Handle with care and use appropriate anti-static precautions.
2. Mounting: Ensure proper heat dissipation if operating near the maximum power dissipation limit. Use a heatsink if necessary.
3. Biasing: Proper biasing of the base-emitter junction is crucial for optimal performance. Ensure that the base current does not exceed the maximum rating.
4. Voltage Ratings: Do not exceed the maximum voltage ratings for collector-emitter, collector-base, and emitter-base as this can lead to device failure.
5. Operating Conditions: Ensure that the operating temperature remains within the specified range to avoid thermal damage.
6. Testing: When testing or measuring parameters, ensure that all conditions are within the specified limits to avoid misleading results or damage to the device.
7. Storage: Store in a dry, cool place away from direct sunlight and sources of heat.

(For reference only)