Low Power NPN Transistors

<p>Low power, small signal, general purpose and RF, NPN transistors.</p>

Low power NPN transistors

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Technical Details
Questions (5)

Device	Mftr.	Case	V_CE	V_CB	V_EB	I_C	P_tot	h_FE min.	f_T
		style	max. (V)	max. (V)	max. (V)	max. (mA)	max. (mW)	@I_C(mA)	MHz
2N2222A	CDIL	TO-18	30	60	5	800	500	100@150	250
2N3053	CDIL	TO-39	40	60	5	700	500	50@150	100
2N3704	CDIL	TO-92 (A)	30	50	5	600	625	100@50	100
2N3705	CDIL	TO-92 (A)	30	50	5	600	625	50@50	100
2N3904	TRU	TO-92 (B)	40	60	6	200	625	100@10	30
2N4401	TRU	TO-92 (B)	40	60	5	600	625	100@150	250
2N4401	CDIL	TO-92	40	60	6	600	625	100 to 300@150	250
BC107	CDIL	TO-18	45	50	6	200	600	100@2	150
BC107B	CDIL	TO-18	45	50	6	200	600	200@2	150
BC108	CDIL	TO-18	25	30	5	200	600	100@2	150
BC108B	CDIL	TO-18	25	30	5	200	600	200@2	150
BC108C	CDIL	TO-18	25	30	5	200	600	420@2	150
BC109	CDIL	TO-18	25	30	5	200	600	200@2	150
BC182L	FCH	TO-92 (A)	50	60	6	100	350	120@2	150
BC183L	CDIL	TO-92 (A)	30	45	6	100	350	120@2	150
BC184	CDIL	TO-92 (C)	30	45	6	100	350	250@2	150
BC184L	FCH	TO-92 (A)	30	45	6	100	350	250@2	150
BC238B	CDIL	TO-92 (C)	25	30	5	100	350	200@2	150
BC337–16	TRU	TO-92 (C)	45	50	5	800	625	100@100	210
BC337–16	DIO	TO-92	50	45	5	800	625	100@100	100
BC337–25	DIO	TO-92	50	45	5	800	625	100@100	100
BC547	CDIL	TO-92	45	50	6	100	500	110@2	100
BC547B	TRU	TO-92	45	50	6	100	500	110@2	300
BC548B	CDIL	TO-92 (C)	30	30	6	100	500	220@2	150
BC548B	FCH	TO-92	30	30	5	100	500	110@2	300
BC548B	TRU	TO-92	30	30	5	100	500	110@2	300
BC548C	ONS	TO-92	30	30	6	100	625	300@100	300
BC549B	TRU	TO-92	30	30	5	100	625	450@2	250
BC549C	TRU	TO-92 (C)	30	30	5	100	625	420@2	-
MPSA42	FCH	TO-92 (B)	300	300	6	500	625	40@30	50
P2N2222A	ONS	TO-92	40	75	6	600	625	40@500	300

*Question functionality currently disabled

25 June 2013 Question by: Rapid Customer

Q. we normally use a BC548 in a light & Dark buzzer circuit, what is the alturnative as it is discontinued ?

A. Hi Jools. Thank you for your question. The following alternatives are all BC548B: 81-0068, 81-0466 or 81-0066.

15 March 2013 Question by: Rapid Customer | Product code: 81-0441

Q. (also 81-0442) Puzzled by datasheets, two different manufacturers. Both devices have two different power ratings, spread across two datasheet columns. I'll take the smaller, but what does it mean? Power dissipation at Tc = 25°C PD 625 mW Derate above 25°C 5.0 mW/°C then on the next row, Power dissipation at Tc = 25°C PD 1.5 W Derate above 25°C 12 mW/°C

A. Hi Matthew. Thank you for your question. Basically this is the amount of power the case will dissipate dependent on the temperature it is running at. The calculation is based on an average of 25 deg but shows to average power at set temperatures: Power dissipation at Tc = 25°C Derate above 25°C PD 625 mW 5.0 mW/°C Power dissipation at Tc = 25°C Derate above 25°C PD 1.5 W 12 mW/°C

06 March 2013 Question by: Rapid Customer | Product code: 81-0036

Q. Could you tell me what transistor i would need to use? we are making a flashing Alien circuit run by a 9v battery,it has 2 LED's and they flash alternately. Thankyou.

A. Hi Mr Mullard. Thank you for your question. 81-0472 is commonly used in this type of project.

20 February 2013 Question by: Rapid Customer | Product code: 81-0484

Q. how to chek pin conection

A. Hi Anjula. Thank you for your question. There are many ways to test a transistor: we sell a unit that can be used or this link shows a few ways to test a transistor.

31 March 2012 Question by: Rapid Customer | Product code: 81-0441

Q. bc549c does not appear in the technical spec area. I need to know if it is TO 92 a,b or c, quite important.

A. HI Max, the bc549C unit is a TO92 and the unit is a C type