© Semiconductor Components Industries, LLC, 2005

November, 2005 − Rev. 14

1

Publication Order Number:

BD237/D

BD237 (NPN), BD234 (PNP),

BD238 (PNP)

Preferred Devices

Plastic Medium Power

Bipolar Transistors

Designed for use in 5.0 to 10 W audio amplifiers and drivers

utilizing complementary or quasi complementary circuits.

Features

Machine Model, C; >400 V

MAXIMUM RATINGS

Rating

Symbol

BD234

BD237

BD238

Unit

Collector−Emitter Voltage

45

80

Vdc

Collector−Base Voltage

60

100

Vdc

Emitter−Base Voltage

5.0

Vdc

Collector Current

2.0

Adc

Base Current

1.0

Adc

Total Device Dissipation

25

W

Operating and Storage Junction

Temperature Range

– 55 to + 150

_C

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Thermal Resistance, Junction−to−Case

5.0

_C/W

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.

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Device

Package

Shipping

ORDERING INFORMATION

BD237

TO−225

500 Units / Box

MARKING DIAGRAM

BD23x = Device Code

x

= 4, 7 or 8

Y

= Year

WW

= Work Week

G

= Pb−Free Package

Preferred devices are recommended choices for future use

and best overall value.

BD238

TO−225

500 Units / Box

http://onsemi.com

2.0 AMPERES

POWER TRANSISTORS

25 WATTS

TO−225

CASE 77

STYLE 1

3

2 1

BD237G

TO−225

(Pb−Free)

500 Units / Box

BD238G

TO−225

(Pb−Free)

500 Units / Box

YWW

BD23xG

BD234

TO−225

500 Units / Box

BD234G

TO−225

(Pb−Free)

500 Units / Box