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Partno	Mfg	Dc	Qty	Available	Descript
BUF644	TEL	N/a	1480	avai	Silicon NPN High Voltage Switching Transistor
BUF644	VISHAY	N/a	296	avai	Silicon NPN High Voltage Switching Transistor
BUF644	TFK	N/a	126	avai	Silicon NPN High Voltage Switching Transistor

BUF644 ,Silicon NPN High Voltage Switching TransistorApplicationsElectronic lamp ballast circuits Switch-mode power supplies
BUF644 ,Silicon NPN High Voltage Switching TransistorAbsolute Maximum RatingsT = 25°C, unless otherwise specifiedcaseParameter Test Conditions Symbol Va ..
BUF644 ,Silicon NPN High Voltage Switching TransistorFeatures

BUF644
Silicon NPN High Voltage Switching Transistor
BUF644
Vishay Telefunken
www.vishay.de • FaxBack +1-408-970-5600
Document Number 86512
Silicon NPN High V oltage Switching Transistor
Features Simple-sWitch-Off Transistor (SWOT) HIGH SPEED technology Planar passivation 100 kHz switching rate Very low switching losses Very low dynamic saturation Very low operating temperature Optimized RBSOA High reverse voltage
Applications
Electronic lamp ballast circuits
Switch-mode power supplies
Absolute Maximum Ratings
Tcase = 25°C, unless otherwise specified
Maximum Thermal Resistance
Tcase = 25°C, unless otherwise specified

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