© Semiconductor Components Industries, LLC, 2006
March, 2006 − Rev. 5
1 Publication Order Number:
BUH51/D
BUH51
SWITCHMODEt NPN Silicon
Planar Power Transistor
The BUH51 has an application specific state−of−art die designed for
use in 50 W Halogen electronic transformers.
This power transistor is specifically designed to sustain the large
inrush current during either the startup conditions or under a short
circuit across the load.
• Improved Efficiency Due to the Low Base Drive Requirements:
High and Flat DC Current Gain h
FE
Fast Switching
• Epoxy Meets UL 94 V−0 @ 0.125 in
• ESD Ratings:
Machine Model, C
Human Body Model, 3B
w This device is available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
MAXIMUM RATINGS
Rating Symbol Value Unit
Collector−Emitter Sustaining Voltage V
CEO
500 Vdc
Collector−Base Breakdown Voltage V
CBO
800 Vdc
Collector−Emitter Breakdown Voltage V
CES
800 Vdc
Emitter−Base Voltage V
EBO
10 Vdc
Collector Current − Continuous
− Peak (Note 1)
I
C
I
CM
3.0
8.0
Adc
Base Current − Continuous
Base Current − Peak (Note 1)
I
B
I
BM
2.0
4.0
Adc
*Total Device Dissipation @ T
C
= 25_C
*Derate above 25°C
P
D
50
0.4
Watt
W/_C
Operating and Storage Temperature T
J
, T
stg
– 65 to
150
_C
THERMAL CHARACTERISTICS
Thermal Resistance, Junction−to−Case R
θ
JC
2.5
_C/W
Thermal Resistance, Junction−to−Ambient R
θ
JA
100
_C/W
Maximum Lead Temperature for Soldering
Purposes: 1/8″ from case for 5 seconds
T
L
260
_C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings
are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended
Operating Conditions may affect device reliability.
1. Pulse Test: Pulse Width = 5 ms, Duty Cycle ≤ 10%.
Device Package Shipping
ORDERING INFORMATION
BUH51 TO−225
TO−225
CASE 77
STYLE 3
500 Units/Box
2
1
3
MARKING DIAGRAM
YWW
BUH51
Y = Year
WW = Work Week
1 BASE
2 COLLECTOR
3 EMITTER
http://onsemi.com
POWER TRANSISTOR
3.0 AMPERE
800 VOLTS
50 WATTS