© Semiconductor Components Industries, LLC, 2004

December, 2004 − Rev. 3

1

Publication Order Number:

BCX17LT1/D

BCX17LT1, BCX18LT1, PNP

BCX19LT1, NPN

General Purpose

Transistors

(Voltage and Current are Negative

for PNP Transistors)

Features

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Collector−Emitter Voltage

BCX17LT1, BCX19LT1

BCX18LT1

45

25

Vdc

Collector−Base Voltage

BCX17LT1, BCX19LT1

BCX18LT1

50

30

Vdc

Emitter − Base Voltage

5.0

Vdc

Collector Current − Continuous

500

mAdc

Maximum ratings are those values beyond which device damage can occur.

Maximum ratings applied to the device are individual stress limit values (not

normal operating conditions) and are not valid simultaneously. If these limits

are exceeded, device functional operation is not implied, damage may occur

and reliability may be affected.

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Total Device Dissipation FR− 5 Board

Derate above 25

°C

225

1.8

mW

mW/

°C

Thermal Resistance,

Junction−to−Ambient

556

°C/W

Total Device Dissipation Alumina

Derate above 25

°C

300

2.4

mW

mW/

°C

Thermal Resistance,

Junction−to−Ambient

417

°C/W

Junction and Storage Temperature

− 55 to +150

°C

1. FR− 5 = 1.0

 0.75  0.062 in.

2. Alumina = 0.4

 0.3  0.024 in 99.5% alumina.

SOT−23

CASE 318

STYLE 6

MARKING DIAGRAM

xxM

1

2

3

COLLECTOR

3

1

BASE

2

EMITTER

COLLECTOR 3

1

BASE

2 EMITTER

PNP

NPN

xx

= T1, T2, or U1

M

= Date Code

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

http://onsemi.com