VISHAY
KBU8A thru KBU8M
Document Number 88658
23-Nov-04
Vishay Semiconductors
www.vishay.com
1
Case Style KBU
~
~
~~
Single-Phase Bridge Rectifier
Major Ratings and Characteristics
IF(AV) 8 A
VRRM 50 V to 1000 V
IFSM 300 A
IR10 µA
VF1.0 V
Tj max. 150 °C
Features
• UL Recognition file number E54214
• Ideal for printed circuit boards
• High surge current capability
• High case dielectric strength of 1500 VRMS
• Meets MSL level 1, per J-STD-020C
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
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)
Maximum Ratings
Ratings at 25 °C ambient temperature unless otherwise specified.
Electrical Characteristics
Ratings at 25 °C ambient temperature unless otherwise specified.
Parameter Symbols KBU8A KBU8B KBU8D KBU8G KBU8J KBU8K KBU8M Units
Maximum repetitive peak reverse voltage VRRM 50 100 200 400 600 800 1000 V
Maximum RMS voltage VRMS 35 70 140 280 420 560 700 V
Maximum DC blocking voltage VDC 50 100 200 400 600 800 1000 V
Maximum average forward TC = 100 °C (1)(3)
rectified output current at TA = 40 °C (2)
IF(AV) 8.0
6.0
A
Peak forward surge current single sine-wave
superimposed on rated load
IFSM 300 A
Operating junction and storage temperature
range
TJ, TSTG - 50 to + 150 °C
Parameter Test condition Symbols KBU8A KBU8B KBU8D KBU8G KBU8J KBU8K KBU8M Units
Maximum instantaneous
forward drop per leg
at 8.0 A VF 1.0 V
Maximum DC reverse
current at rated DC blocking
voltage per leg
TA = 25 °C
TA = 125 °C
IR 10
1.0
µA
mA
www.vishay.com
2
Document Number 88658
23-Nov-04
VISHAY
KBU8A thru KBU8M
Vishay Semiconductors
Thermal Characteristics
Ratings at 25 °C ambient temperature unless otherwise specified.
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
(TA = 25 °C unless otherwise noted)
Parameter Symbols KBU8A KBU8B KBU8D KBU8G KBU8J KBU8K KBU8M Units
Typical thermal resistance per leg RθJA
RθJC
18(2)
3.0(3)
°C/W
Figure 1. Derating Curve Output Rectified Current
Figure 2. Maximum Non-Repetitive Peak Forward Surge Current
Temperature ( °C)
Average Forward Current (A)
050 100 150
0
2.0
4.0
6.0
8.0
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
Heatsink Mounting,
T
C,
3.0 x 3.0 x 12" Thk
Al. Plate (7.5 x 0.3 cm)
Number of Cycles at 60 H
Z
Peak Forward Surge Current (A)
110 100
0
50
100
150
200
250
300
T
J
= 150°C
Single Sine-Wave
1.0 Cycle
Figure 3. Typical Instantaneous Forward Characteristics Per Leg
Figure 4. Typical Reverse Leakage Characteristics Per Leg
Instantaneous Forward Voltage (V)
Instantaneous Forward Current (A)
0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
0.1
1
10
100
T
J
=25°C
Pulse Width = 300 µs
1% Duty Cycle
Percent of Rated Peak Reverse Voltage (%)
Instantaneous Reverse Current (µA)
020 40 60 80 100
0.01
0.1
1
10
50
T
J
= 100°C
T
J
=25°C
VISHAY
KBU8A thru KBU8M
Document Number 88658
23-Nov-04
Vishay Semiconductors
www.vishay.com
3
Package outline dimensions in inches (millimeters)
Figure 5. Typical Junction Capacitance Per Leg
Reverse Voltage (V)
Junction Capacitance, pF
110 100
10
100
400
TJ=25°C
f = 1.0 MH
Z
Vsig = 50mVp-p
0.160 (4.1)
0.065 (1.7)
0.185 (4.7)
0.895 (22.7)
0.935 (23.7)
0.140 (3.6) 0.165 (4.2)
0.085 (2.2)
0.240 (6.09)
0.200 (5.08)
0.220 (5.6)
0.180 (4.6)
0.075 (1.9) R. TYP.
(2 PLACES)
45o
0.205 (5.2)
0.185 (4.7)
0.052 (1.3)
0.048 (1.2)
0.280 (7.1)
0.260 (6.6)
DIA.
0.760
(19.3)
MAX.
0.700
(17.8)
0.660
(16.8)
1.0
(25.4)
MIN.
0.455 (11.3)
0.405 (10.3)
Case Style KBU