: JEDEC DO-41, moulded plastic.
: Plated axial leads, solderable
per MIL-STD-202, Method 208.
: Colour band denotes cathode end.
: Any
: 0.3 grams (0.012 ounce)
BA157 THRU BA159
1 AMP FAST RECOVERY SILICON RECTIFIERS
VOLTAGE
400 to 1000 Volts
CURRENT
1.0 Amp
Fast recovery times for high efficiency
Low cost construction utilizing void - free
moulded plastic technique
Plastic package has Underwriters Laboratories
Flammability Classification 94V-0
High surge current capability
Low leakage
High temperature soldering capability
250°C/10 seconds/9.5mm (.375in.) lead length at
2.3kg (5lb) tension
Easily cleaned with Freon, Alcohol, Chlorothene
and other similar solvents
FEATURES
MECHANICAL DATA
Case
Terminals
Polarity
Mounting Position
Weight
DIMENSIONS
- millimeters (inches)
25.4 (1.0)
min.
5.2 (.205)
4.1 (.160)
2.7 (.107)
2.0 (.080)
.86 (.034)
.71 (.028)
Cathode Band
25.4 (1.0)
min.
TECHNICAL SPECIFICATION
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25°C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%.
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
9.5mm (.375in.) Lead Length at TA = 75°C
V
V
A
A
Peak Forward Surge Current, 8.3 ms single half
sine - wave superimposed on rated load
µA
Storage Temperature Range °C
°C
BA157 BA158 BA159
400
400
600
600
1000
1000
280 420 700
Maximum Instantaneous Forward Voltage at 1.0A
Operating Temperature Range
1.0
30
1.2
5.0
- 50 to + 175
V
Maximum Reverse Current at Rated
DC Blocking Voltage
Typical Junction Capacitance (see Note 1)
Typical Thermal Resistance (see Note 2)
100
°C/W
pF
V
Notes :
1. Measured at 1.0 MHz and applied reverse voltage of 4.0 Volts
2. Thermal Resistance from Junction to Ambient
3. Test Conditions : IF = 0.5A, IR = 1.0A recovery to 0.25A
µA
50
VRMS
VDC
IF(AV)
IFSM
IR
TJ
TSTG
VRRM
RTHja
CJ
VF
Maximum Reverse Recovery Time (see Note 3)
Symbols
15
150
trr nS
Units
DO-41
250 500
TA = 100°C
TA = 25°C
- 50 to + 175
Reformatted by Anglia 9851
RATING AND CHARACTERISTIC CURVES
BA157 THRU BA159
FIG. 2 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT
10
25
30
110 100
NUMBER OF CYCLES AT 60Hz
PEAK FORWARD SURGE
CURRENT, AMPERES
2 5 20 50
15
20
TA = 75°C
8.3ms single half sine-wave
(JEDEC) method
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT,
AMPERES
1.6
.01
.03
0.1
10
0.4 0.6 0.8 1.0 1.2 1.4
INSTANTANEOUS FORWARD
VOLTAGE, VOLTS
0.3
1.0
3.0
30
100
TJ = 25°C
Pulse width = 300µs
2% duty cycle
5
FIG. 4 - TYPICAL JUNCTION CAPACITANCE
REVERSE VOLTAGE, VOLTS
1
10
1 10 100
CAPACITANCE, pF
2
5
15
2 5 20 50
.1 .2 .5
T = 25°C
f = 1MHz
VSIG = 50mVp-p
J
AVERAGE FORWARD RECTIFIED
CURRENT, AMPERES
FIG. 1 - FORWARD CURRENT DERATING CURVE
25 50 75 100 125 150 175 200
0
0.4
0.6
0.8
1.0
0.2
AMBIENT TEMPERATURE, °C
5mm x 5mm Cu Leafs
9.5mm Lead Length
L
0
FIG. 5 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTICS
+0.5A
0
-0.25A
-1.0A 1cm SET TIME BASE
FOR 50/100ns/cm
trr
PULSE
GENERATO
R (Note 2)
(–)
(+)
10ý NONINDUCTIVE50ý NONINDUCTIVE
DUT
OSCILLOSCOPE
(Note 1)
1ý NON
INDUCTIVE
25Vdc
(approx)
NOTES 1 Rise Time = 7ns max, Input Impedance = 1 megaohm 22pF
2 Rise Time = 10ns max, Source Impedance = 50 ohms
Reformatted by Anglia 9851
