© Semiconductor Components Industries, LLC, 2005

October, 2005− Rev. 14

1

Publication Order Number:

BD437/D

BD435, BD437, BD439,

BD441

Plastic Medium Power

Silicon NPN Transistor

This series of plastic, medium−power silicon NPN transistors can be

used for amplifier and switching applications. Complementary types

are BD438 and BD442.

Features

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Collector−Emitter Voltage

BD435

BD437

BD439

BD441

32

45

60

80

Vdc

Collector−Base Voltage

BD435

BD437

BD439

BD441

32

45

60

80

Vdc

Emitter−Base Voltage

5.0

Vdc

Collector Current

4.0

Adc

Base Current

1.0

Adc

Derate above 25

°C

36

288

W

W/

°C

Operating and Storage Junction

Temperature Range

– 55 to + 150

°C

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Thermal Resistance, Junction−to−Case

3.5

°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.

http://onsemi.com

Device

Package

Shipping

BD435

TO−225AA

500 Units/Box

BD437

TO−225AA

500 Units/Box

4.0 AMPERES

POWER TRANSISTORS

NPN SILICON

BD439

TO−225AA

500 Units/Box

BD441

TO−225AA

500 Units/Box

TO−225AA

CASE 77

STYLE 1

MARKING DIAGRAM

YWW

BD4xxG

3

2 1

BD437T

TO−225AA

50 Units/Rail

ORDERING INFORMATION

BD4xx

= Device Code

xx = 35, 37, 37T, 39, 41

Y

= Year

WW

= Work Week

G

= Pb−Free Package

BD435G

TO−225AA

(Pb−Free)

500 Units/Box

BD437G

TO−225AA

(Pb−Free)

500 Units/Box

BD437TG

TO−225AA

(Pb−Free)

50 Units/Rail

BD439G

TO−225AA

(Pb−Free)

500 Units/Box

BD441G

TO−225AA

(Pb−Free)

500 Units/Box