4/98
KBU8A THRU KBU8M
SINGLE-PHASE BRIDGE RECTIFIER
Reverse Voltage - 50 to 1000 Volts
Forward Current - 8.0 Amperes
FEATURES
Plastic material used carries Underwriters Laboratory
Flammability Classification 94V-0
This series is UL listed under Recognized Component Index,
file number E54214
High case dielectric strength
of 1500 V
RMS
Ideal for printed circuit boards
High forward surge current capability
High temperature soldering guaranteed:
250C/10 seconds, 0.375" (9.5mm) lead length,
5lbs. (2.3 kg) tension
MECHANICAL DATA
Case: Molded plastic body
Terminals: Plated leads solderable per MIL-STD-750,
Method 2026
Mounting Position: Any
(NOTE 1)
Mounting Torque: 5 in.-lb. max.
Weight: 0.3 ounce, 8.0 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25C ambient temperature unless otherwise specified.
KBU
KBU
KBU
KBU
KBU
KBU
KBU
SYMBOLS
8A
8B
8D
8G
8J
8K
8M
UNITS
Maximum repetitive peak reverse voltage
V
RRM
50
100
200
400
600
800
1000
Volts
Maximum RMS voltage
V
RMS
35
70
140
280
420
560
700
Volts
Maximum DC blocking voltage
V
DC
50
100
200
400
600
800
1000
Volts
Maximum average forward rectified T
C
=100C
(NOTE 1, 3)
8.0
output current at
T
A
=45C
(NOTE 2)
I
(AV)
6.0
Amps
Peak forward surge current single half sine-wave
superimposed on rated load (JEDEC Method) T
J
=150C
I
FSM
300.0
Amps
Maximum instantaneous forward voltage drop
per leg at 8.0A
V
F
1.0
Volts
Maximum DC reverse current at rated
T
A
=25C
10.0
A
DC blocking voltage per leg
T
A
=125C
I
R
1.0
mA
Typical thermal resistance per leg
(NOTE 2)
R
JA
18.0
(NOTE 3)
R
JC
3.0
C/W
Operating junction and storage temperature range
T
J
, T
STG
-50 to +150
C
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" (9.5mm) lead length with 0.5 x 0.5" (12 x 12mm) copper pads
(3) Units mounted on a 3.0 x 3.0" x 0.11" thick (7.5 x 7.5 x 0.3cm) Al. Plate heatsink
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)
45
o
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
Dimensions in inches and (millimeters)
0
50
100
150
0
2.0
4.0
6.0
8.0
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
0.1
1
10
100
1
10
100
0
50
100
150
200
250
300
1
10
100
10
100
400
0
20
40
60
80
100
0.01
0.1
1
10
50
RATINGS AND CHARACTERISTICS CURVES KBU8A THRU KBU8M
FIG. 1 - DERATING CURVE OUTPUT RECTIFIED
CURRENT
TEMPERATURE, C
P.C.B. MOUNTING, T
A
0.375" (9.5mm) LEAD LENGTH
0.5 x 0.5" (12 x 12mm) COPPER PADS
PERCENT OF RATED PEAK REVERSE
VOLTAGE, %
INSTANTANEOUS FORWARD VOLTAGE,
VOLTS
INSTANTANEOUS REVERSE CURRENT,
MICROAMPERES
T
J
=25C
PULSE WIDTH=300
s
1% DUTY CYCLE
FIG. 4 - TYPICAL REVERSE LEAKAGE
CHARACTERISTICS PER LEG
INSTANTANEOUS FORWARD CURRENT,
AMPERES
FIG. 5 - TYPICAL JUNCTION CAPACITANCE
PER LEG
REVERSE VOLTAGE, VOLTS
T
J
=25
C
f=1.0 MHz
Vsig=50mVp-p
T
J
=100C
HEAT-SINK MOUNTING,T
C
3.0 x 3.0 x 12"THK AL. PLATE
(7.5 x 0.3cm)
AVERAGE FORWARD CURRENT,
AMPERES
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS PER LEG
SINGLE SINE-WAVE
(JEDEC Method)
T
J
=150C
NUMBER OF CYCLES AT 60 H
Z
PEAK FORWARD SURGE CURRENT,
AMPERES
FIG. 2 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT
T
J
=25C
60 H
Z
RESISTIVE OR INDUCTIVE LOAD
1.0 CYCLE
JUNCTION
CAPACITANCE, pF
PDF 
ZIP