Single Bipolar Transistors

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	Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	Vce Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Frequency - Transition	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
	2SCR513RTL TRANS NPN 50V 1A TSMT3 Rohm Semiconductor	4,899 In Stock	1 : £0.53000 Cut Tape (CT) 3,000 : £0.12529 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	NPN	1 A	50 V	350mV @ 25mA, 500mA	1µA (ICBO)	180 @ 50mA, 2V	500 mW	360MHz	150°C (TJ)	Surface Mount	SC-96	TSMT3
	BC817-40LT1G TRANS NPN 45V 0.5A SOT23-3 onsemi	0 In Stock Check Lead Time	1 : £0.11000 Cut Tape (CT) 3,000 : £0.02202 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	NPN	500 mA	45 V	700mV @ 50mA, 500mA	100nA (ICBO)	250 @ 100mA, 1V	300 mW	100MHz	-65°C ~ 150°C (TJ)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3 (TO-236)

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Discrete Bipolar Junction Transistors (BJTs) are commonly used to construct analog signal amplification functions in audio, radio, and other applications. One of the first semiconductor devices to be mass produced, their characteristics are less favorable than those of other device types for applications involving high frequency switching and operation with high currents or voltages, but they remain a technology of choice for applications requiring analog signal reproduction with minimal added noise and distortion. BJTs come in two varieties - NPN and PNP - which refer to the sequence of semiconductor layers that make up the transistor. NPN transistors consist of a thin P-type semiconductor between two N-type materials, while PNP transistors have an N-type semiconductor between two P-types. This gives the two types opposite polarity operation. NPN transistors sink current, while PNP transistors source current.