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Motorola SmallSignal Transistors, FETs and Diodes Device Data

High Voltage Transistors

PNP Silicon

MAXIMUM RATINGS

Rating

Symbol

BF421

BF423

Unit

Collector Emitter Voltage

VCEO

300

250

Vdc

Collector Base Voltage

VCBO

300

250

Vdc

Emitter Base Voltage

VEBO

5.0

Vdc

Collector Current -- Continuous

500

mAdc

Total Device Dissipation

@ TA = 25

Derate above 25

625

5.0

mW/

Total Device Dissipation

@ TC = 25

Derate above 25

1.5

Watts

mW/

Operating and Storage Junction

Temperature Range

TJ, Tstg

55 to +150

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Thermal Resistance, Junction to Ambient

200

C/W

Thermal Resistance, Junction to Case

83.3

C/W

ELECTRICAL CHARACTERISTICS

(TA = 25

C unless otherwise noted)

Characteristic

Symbol

Min

Max

Unit

OFF CHARACTERISTICS

Collector Emitter Breakdown Voltage (1)

(IC = 1.0 mAdc, IB = 0)

BF421
BF423

V(BR)CEO

300
250

--
--

Vdc

Collector Base Breakdown Voltage

(IC = 100

Adc, IE = 0)

BF421
BF423

V(BR)CBO

300
250

--
--

Vdc

Emitter Base Breakdown Voltage

(IE = 100

Adc, IC = 0)

BF421
BF423

V(BR)EBO

5.0
5.0

--
--

Vdc

Collector Cutoff Current

(VCB = 200 Vdc, IE = 0)

BF421
BF423

ICBO

--
--

0.01

Adc

Emitter Cutoff Current

(VEB = 5.0 Vdc, IC = 0)

BF421
BF423

IEBO

--
--

100

nAdc

1. Pulse Test: Pulse Width

300

s; Duty Cycle

2.0%.

Order this document

by BF421/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

BF421

BF423

CASE 2904, STYLE 14

TO92 (TO226AA)

Motorola, Inc. 1996

COLLECTOR

BASE

EMITTER

BF421 BF423

Motorola SmallSignal Transistors, FETs and Diodes Device Data

ELECTRICAL CHARACTERISTICS

(TA = 25

C unless otherwise noted) (Continued)

Characteristic

Symbol

Min

Max

Unit

ON CHARACTERISTICS

DC Current Gain

(IC = 25 mA, VCE = 20 Vdc)

BF421
BF423

hFE

50
50

--
--

Collector Emitter Saturation Voltage

(IC = 20 mAdc, IB = 2.0 mAdc)

VCE(sat)

0.5

Vdc

Base Emitter Saturation Voltage

(IC = 20 mA, IB = 2.0 mA)

VBE(sat)

2.0

Vdc

SMALL SIGNAL CHARACTERISTICS

Current Gain -- Bandwidth Product

(IC = 10 mAdc, VCE = 10 Vdc, f = 20 MHz)

MHz

Common Emitter Feedback Capacitance

(VCB = 30 Vdc, IE = 0, f = 1.0 MHz)

Cre

2.8

BF421 BF423

Motorola SmallSignal Transistors, FETs and Diodes Device Data

Figure 1. DC Current Gain

IC, COLLECTOR CURRENT (mA)

150

1.0

, DC CURRENT

GAIN

TJ = +125

+25

VCE = 10 Vdc

100

2.0

3.0

5.0

7.0

100

C, CAP

ACIT

ANCE (pF)

Figure 2. Capacitances

VR, REVERSE VOLTAGE (VOLTS)

0.1

100

1.0

Ccb

2.0

5.0

Cib

Figure 3. CurrentGain -- Bandwidth Product

IC, COLLECTOR CURRENT (mA)

5.0

2.0

100

TJ = 25

VCE = 20 Vdc

, CURRENTGAIN -- BANDWIDTH PRODUCT

(MHz)

1.0

IC, COLLECTOR CURRENT (mA)

Figure 4. "On" Voltages

, VOL

T
AGE (VOL

TS)

1.0

VCE(sat) @ IC/IB = 10 mA

VBE @ VCE = 10 V

0.8

0.6

0.4

0.2

VCE, COLLECTOREMITTER VOLTAGE (VOLTS)

I C

, COLLECT

OR CURRENT

(mA)

BF423

Figure 5. Active Region -- Safe Operating Area

BONDING WIRE LIMITATION
SECOND BREAKDOWN
LIMITATION

BF421

100

1.0 ms

TJ = 150

1.5 WATT THERMAL
LIMITATION @ TC = 25

625 mW THERMAL
LIMITATION @ TA = 25

500

5.0

100

200

0.2 0.5 1.0 2.0 5.0 10 20

50 100 200 500 1000

100

5.0

2.0

1.0

100

3.0

5.0

20 30

100

200 300

1.0 s

BF421 BF423

Motorola SmallSignal Transistors, FETs and Diodes Device Data

PACKAGE DIMENSIONS

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R

IS UNCONTROLLED.

4. DIMENSION F APPLIES BETWEEN P AND L.

DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.

SECTION XX

X X

SEATING
PLANE

DIM

MIN

MAX

MIN

MAX

MILLIMETERS

INCHES

0.175

0.205

4.45

5.20

0.170

0.210

4.32

5.33

0.125

0.165

3.18

4.19

0.016

0.022

0.41

0.55

0.016

0.019

0.41

0.48

0.045

0.055

1.15

1.39

0.095

0.105

2.42

2.66

0.015

0.020

0.39

0.50

0.500

12.70

0.250

6.35

0.080

0.105

2.04

2.66

0.100

2.54

0.115

2.93

0.135

3.43

CASE 02904

(TO226AA)

ISSUE AD

STYLE 14:

PIN 1. EMITTER

2. COLLECTOR
3. BASE

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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
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Opportunity/Affirmative Action Employer.

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BF421/D

*BF421/D*

Part Number BF421