Fairchild KBU4A, KBU4M service manual
Features
• High surge current capability.
• Reliable construction technique.
• Ideal for printed circuit board.
Bridge Rectifiers
KBU4A - KBU4M
-
KBU
KBU4A - KBU4M
~
~
+
Absolute Maximum Ratings* T
Symbol
V
Maximum Repetitive Reverse Voltage 50 100 200 400 600 800 1000 V
RRM
V
Maximum RMS Bridge Input Voltage 35 70 140 280 420 560 700 V
RMS
Parameter
= 25°C unless otherwise noted
A
4A 4B 4D 4G 4J 4K 4M
Value
Units
VR DC Reverse Voltage (Rated VR) 50 100 200 400 600 800 1000 V
I
Average Rectified Forward Current, @ TA = 50°C 4.0 A
F(AV)
I
Non-repetitive Peak Forward Surge Current 200 A
FSM
T
stg
Storage Temperature Range -55 to +150
TJ Operating Junction Temperature -55 to +150
C
°
C
°
*These ratings are limiting values above which the serviceability of any semiconductor device may be impaired.
Thermal Characteristics
Symbol
PD Power Dissipation 6.6 W
R
θ
R
θ
Thermal Resistance, Junction to Ambient,* per leg 19
JA
Thermal Resistance, Junction to Lead,* per leg 4.0
JL
*Device mounted on PCB with 0.375 " (9.5 mm) lead length and 0.5 x 0.5" (13 x 13 mm) copper pads.
Electrical Characteristics T
Symbol Parameter Device Units
VF Forward Voltage, per bridge @ 4.0 A 1.0 V
IR
Reverse Current, total bridge @ rated V
TA = 25°C
T
Parameter
= 100°C
A
= 25°C unless otherwise noted
A
R
Value
5.0
500
Units
C/W
°
C/W
°
A
µ
A
µ
KBU4A-KBU4M, Rev. C2001 Fairchild Semiconductor Corporation
T ypical Characteristics
KBU4A - KBU4M
Bridge Rectifiers
(continued)
5
[A]
F
4
3
SINGLE PHASE
HALF WAVE
2
60HZ
RESISTIVE OR
INDUCTIVE LOAD
1
.375" 9.0 mm LEAD
LENGTHS
0
0 50 100 150
Average Rectified Forward Current, I
Ambient Temperature [ºC]
Figure 1. Forward Current Derating Curve
200
[A]
175
FSM
150
125
100
[A]
F
10
1
º
º
T = 25 C
T = 25 C
J
Forward Current, I
0.1
0.6 0.7 0.8 0.9 1 1.1 1.2 1.3
A
Pulse Width = 300
2% Duty Cycle
µµµµ
S
Forward Voltage, VF [V]
Figure 2. Forward Voltage Characteristics
100
T = 100 C
º
A
10
[mA]
R
100
75
50
25
0
Peak Forward Surge Current, I
12 51020 50100
Number of Cycles at 60Hz
1
T = 25 C
º
Reverse Current, I
0.1
0 20406080100120140
A
Percent of Rated Peak Reverse Voltage [%]
Figure 3. Non-Repetitive Surge Current Figure 4. Reverse Current vs Reverse Voltage
KBU4A-KBU4M, Rev. C2001 Fairchild Semiconductor Corporation
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