VISHAY
KBU8A thru KBU8M
Vishay Semiconductors
Single-Phase Bridge Rectifier
Major Ratings and Characteristics
I
F(AV)
V
RRM
I
FSM
I
R
V
F
T
j
max.
8A
50 V to 1000 V
300 A
10 µA
1.0 V
150 °C
Case Style KBU
~
~
~
~
Features
•
•
•
•
•
UL Recognition file number E54214
Ideal for printed circuit boards
High surge current capability
High case dielectric strength of 1500 V
RMS
Meets MSL level 1, per J-STD-020C
Mechanical Data
Case:
KBU
Epoxy meets UL-94V-0 Flammability rating
Terminals:
Silver plated (E4 Suffix) leads, solderable
per J-STD-002B and MIL-STD-750, Method 2026
Polarity:
As marked on body
Mounting Torque:
10 cm-kg (8.8 inches-lbs) max.
Recommended Torque:
5.7 cm-kg (5 inches-lbs)
Typical Applications
General purpose use in ac-to-dc bridge full wave rec-
tification for Monitor, TV, Printer, SMPS, Adapter,
Audio equipment, and Home Appliances applications
Maximum Ratings
Ratings at 25 °C ambient temperature unless otherwise specified.
Parameter
Maximum repetitive peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forward T
C
= 100 °C
(1)(3)
rectified output current at
T
A
= 40 °C
(2)
I
FSM
T
J
, T
STG
Peak forward surge current single sine-wave
superimposed on rated load
Operating junction and storage temperature
range
Symbols
V
RRM
V
RMS
V
DC
I
F(AV)
KBU8A KBU8B KBU8D KBU8G
50
35
50
100
70
100
200
140
200
400
280
400
8.0
6.0
300
- 50 to + 150
KBU8J
600
420
600
KBU8K KBU8M
800
560
800
1000
700
1000
Units
V
V
V
A
A
°C
Electrical Characteristics
Ratings at 25 °C ambient temperature unless otherwise specified.
Parameter
Maximum instantaneous
forward drop per leg
Maximum DC reverse
current at rated DC blocking
voltage per leg
Document Number 88658
23-Nov-04
Test condition
at 8.0 A
T
A
= 25 °C
T
A
= 125 °C
Symbols
V
F
I
R
KBU8A KBU8B KBU8D KBU8G
1.0
10
1.0
KBU8J
KBU8K KBU8M
Units
V
µA
mA
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1
KBU8A thru KBU8M
Vishay Semiconductors
Thermal Characteristics
Ratings at 25 °C ambient temperature unless otherwise specified.
Parameter
Typical thermal resistance per leg
Symbols
R
θJA
R
θJC
KBU8A KBU8B KBU8D KBU8G
18
(2)
3.0
(3)
KBU8J
VISHAY
KBU8K KBU8M
Units
°C/W
Notes:
(1) Recommended mounting position is to bolt down on heatsink with silicone thermal compound for maximum heat transfer with #6 screw
(2) Units mounted in free air, no heatsink, P.C.B. at 0.375" (9.5 mm) lead length with 0.5 x 0.5" (12 x 12 mm) copper pads
(3) Units mounted on a 3.0 x 3.0" x 0.11" thick (7.5 x 7.5 x 0.3 cm) Al. Plate heatsink
Ratings and Characteristics Curves
(T
A
= 25
°C
unless otherwise noted)
8.0
Heatsink Mounting,
T
C,
3.0 x 3.0 x 12" Thk
Al. Plate (7.5 x 0.3 cm)
100
6.0
Instantaneous Forward Current (A)
Average Forward Current (A)
10
T
J
= 25 °C
Pulse Width = 300
µs
1% Duty Cycle
1
4.0
2.0
P.C.B. Mounting, T
A
0.375" x (9.5 mm) Lead Length
0.5 x 0.5" (12 x 12 mm) Copper Pads
60 H
Z
Resistive or Inductive Load
0
50
100
150
0
0.1
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
Temperature ( °C)
Instantaneous Forward Voltage (V)
Figure 1. Derating Curve Output Rectified Current
Figure 3. Typical Instantaneous Forward Characteristics Per Leg
300
50
Instantaneous Reverse Current (µA)
Peak Forward Surge Current (A)
T
J
= 150 °C
Single Sine-Wave
250
200
10
T
J
= 100 °C
150
100
1
0.1
T
J
= 25 °C
50
1.0 Cycle
0
1
10
100
0.01
0
20
40
60
80
100
Number
of Cycles at 60 H
Z
Percent of Rated Peak Reverse Voltage (%)
Figure 2. Maximum Non-Repetitive Peak Forward Surge Current
Figure 4. Typical Reverse Leakage Characteristics Per Leg
www.vishay.com
2
Document Number 88658
23-Nov-04
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