2N2857 datasheet(1/1 Pages) CENTRAL

Part #	2N2857

Description	Small Signal NPN Transistors / Dual Transistors

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Manufacturer	CENTRAL [Central Semiconductor Corp]

Direct Link	http://www.centralsemi.com

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Small Signal NPN Transistors

TO-72 Case

69

www.centralsemi.com

Dual Transistors

TO-71 Case

PD @ TA=25

oC=360mW Total (Both Die Equal Power)

TYPENO.

DESCRIPTION

VCBO VCEO VEBO ICBO @VCB

hFE

@ IC @ VCE VCE (SAT) @ IC

fT

Cob

(V)

(

µµA)

(V)

(mA)

(V)

(mA)

(MHz)

*Ccb

(pF)

MIN

MAX

MIN

MAX

MIN

MAX

2N917

RF/IF OSCILLATOR

30

15

3.0

0.001

15

20

- -

3.0

1.0

0.5

3.0

500

1.7

2N917A

RF/IF OSCILLATOR

30

15

3.0

- -

20

200

3.0

10

- -

600

1.7

2N918

RF/IF OSCILLATOR

30

15

3.0

0.01

15

20

- -

3.0

1.0

0.4

10

600

1.7

2N998

DARLINGTON

100

60

15

0.01

90

1,600 8,000

10

5.0

1.8

100

60

30

2N2857

VHF/UHF OSC

30

15

2.5

0.01

15

30

150

3.0

1.0

- -

1,000

1.0*

2N2865

RF/IF OSCILLATOR

25

13

3.0

0.01

15

20

200

4.0

10

0.4

10

600

2.5

2N3478

VHF/UHF LOW NOISE

30

15

2.0

0.02

1.0

25

150

2.0

8.0

- -

750

1.0*

2N3839

VHF/UHF AMPL/OSC

30

15

2.5

0.01

15

30

150

3.0

1.0

- -

1,000

1.0*

2N5179

VHF/UHF AMPL/OSC

20

12

2.5

0.02

15

25

250

3.0

1.0

0.4

10

900

1.0*

BFY90

VHF/UHF AMPL/OSC

30

15

2.5

0.01

15

20

125

25

1.0

- -

1,000

1.5*

Shaded areas indicate Darlington.

TYPENO.

DESCRIPTION

VCBO VCEO VEBO ICBO @VCB

hFE

@ IC @ VCE VCE (SAT) @ IC

MATCHING

(V)

(nA)

(V)

(mA)

(V)

(mA)

hFE

VBE

MIN

MAX

MIN

MAX

%

(mV)

CEN741

NPN LOW NOISE

45

6.0

10

45

150

600

0.01

5.0

0.35

1.0

20

5.0

CEN832

PNP LOW NOISE

60

5.0

10

50

150

450

1.0

5.0

0.25

1.0

20

5.0

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