BF840 datasheet(1/1 Pages) KEXIN

部件名	BF840

功能描述	NPN Medium Frequency Transistor

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制造商	KEXIN [Guangdong Kexin Industrial Co.,Ltd]

网页	http://www.kexin.com.cn/index.asp

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SMD Type

IC

www.kexin.com.cn

1

SMD Type

Transistors

0.4+0.1

-0.1

2.9+0.1

-0.1

0.95+0.1

-0.1

1.9+0.1

-0.1

1.Base

2.Emitter

3.collector

12

3

Unit: mm

SOT-23

0.1+0.05

-0.01

NPN Medium Frequency Transistor

BF840

Features

Low current (max. 25 mA).

Low voltage (max. 40 V).

Absolute Maximum Ratings Ta = 25

Parameter

Symbol

Rating

Unit

Collector-base voltage

VCBO

40

V

Collector-emitter voltage

VCEO

40

V

Emitter-base voltage

VEBO

4V

Collector current

IC

25

mA

Peak collector current

ICM

25

mA

Total power dissipation *

Ptot

250

mW

Storage temperature

Tstg

-65to+150

Junction temperature

Tj

150

Operating ambient temperature

Ramb

-65to+150

Thermal resistance from junction to ambient *

Rth j-a

500

K/W

* Transistor mounted on an FR4 printed-circuit board.

Electrical Characteristics Ta = 25

Parameter

Symbol

Testconditons

Min

Typ

Max

Unit

Collector cutoff current

ICBO

IE =0; VcB = 20 V

100

nA

Emitter cutoff current

IEBO

Ic = 0; VEB = 4 V

100

nA

DC current gain

hFE

Ic = 1 mA; VcE = 10 V

67

222

Base to emitter voltage

VBE

Ic = 1 mA; VcE = 10 V

675

725

775

mV

Feedback capacitance

Cre

Ic = 0; VcB =10V; f = 1MHz

0.3

pF

Transition frequency

fT

Ic = 1 mA; VcE = 10 V; f = 100 MHz

380

MHz

Marking

NC

类似零件编号 - BF840

制造商	部件名	数据表	功能描述
NXP Semiconductors	BF840	41Kb / 8P	NPN medium frequency transistor 1999 Apr 12
Siemens Semiconductor G...	BF840	20Kb / 2P	NPN Silicon RF Transistors (Suitable for common emitter RF, IF amplifiers Low collector-base capacitance due to contact shield diffusion)
Rectron Semiconductor	BF840	27Kb / 2P	SOT-23 - Power Transistor and Darlingtons
NXP Semiconductors	BF840	101Kb / 6P	NPN medium frequency transistor 2004 Jan 13
Continental Device Indi...	BF840	85Kb / 3P	SILICON PLANAR TRANSISTORS

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