4/98
KBU8A THRU KBU8M
SINGLE-PHASE BRIDGE RECTIFIER
Reverse Voltage - 50 to 1000 Volts Forward Current - 8.0 Amperes
FEATURES
♦ Plastic material used carr ies Underwriters Laborator y
Flammability Classification 94V-0
♦ This series is UL listed under Recognized Component Index,
file number E54214
♦ High case dielectric strength
of 1500 VRMS
♦ Ideal for printed circuit boards
♦ High forward surge current capability
♦ High temperature soldering guaranteed:
250°C/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 T orque: 5 in.-lb. max.
Weight: 0.3 ounce, 8.0 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C 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 VRRM 50 100 200 400 600 800 1000 Volts
Maximum RMS voltage VRMS 35 70 140 280 420 560 700 Volts
Maximum DC blocking voltage VDC 50 100 200 400 600 800 1000 Volts
Maximum average forward rectified TC=100°C (NOTE 1, 3) 8.0
output current at TA=45°C (NOTE 2) I(AV) 6.0 Amps
Peak forward surge current single half sine-wave
superimposed on rated load (JEDEC Method) TJ=150°C IFSM 300.0 Amps
Maximum instantaneous forward voltage drop
per leg at 8.0A VF1.0 Volts
Maximum DC reverse current at rated TA=25°C 10.0 µA
DC blocking voltage per leg TA=125°C IR1.0 mA
Typical thermal resistance per leg (NOTE 2) RΘJA 18.0
(NOTE 3) RΘJC 3.0 °C/W
Operating junction and storage temperature range TJ, 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
110100
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, TA
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
TJ=25°C
PULSE WIDTH=300µs
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
TJ=25°C
f=1.0 MHz
Vsig=50mVp-p
TJ=100°C
HEAT-SINK MOUNTING,TC
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)
TJ=150°C
NUMBER OF CYCLES AT 60 HZ
PEAK FORWARD SURGE CURRENT,
AMPERES
FIG. 2 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT
TJ=25°C
60 HZRESISTIVE OR INDUCTIVE LOAD 1.0 CYCLE
JUNCTION CAPACITANCE, pF
