RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
FM420
THRU
FM440
SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER
VOLTAGE RANGE 20 to 40 Volts CURRENT 4.0 Amperes
FEATURES
*
*
*
*
*
Ideal for surface mounted applications
Low leakage current
Metallurgically bonded construction
Mounting position: Any
Weight: 0.24 gram
DO-214AB
MECHANICAL DATA
* Epoxy: Device has UL flammability classification 94V-O
0.125 (3.17)
0.115 (2.92)
0.280 (7.11)
0.260 (6.60)
0.245 (6.22)
0.220 (5.59)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
o
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
0.103 (2.62)
0.079 (2.06)
0.060 (1.52)
0.030 (0.76)
0.320 (8.13)
0.305 (7.75)
0.012 (0.305)
0.006 (0.152)
0.008 (0.203)
0.004 (0.102)
Dimensions in inches and (millimeters)
MAXIMUM RATINGS
(At T
A
= 25
o
C unless otherwise noted)
RATINGS
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
at Derating Lead Temperature
Peak Forward Surge Current 8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Typical Thermal Resistance (Note 1)
Typical Junction Capacitance (Note 2)
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
RRM
V
RMS
V
DC
I
O
I
FSM
R
θ
JA
C
J
T
J
T
STG
FM420
20
14
20
FM430
30
21
30
4.0
90
25
200
-55 to + 125
-55 to + 150
FM440
40
28
40
UNITS
Volts
Volts
Volts
Amps
Amps
0
C/ W
pF
0
0
C
C
ELECTRICAL CHARACTERISTICS
(At T
A
= 25
o
C unless otherwise noted)
CHARACTERISTICS
Maximum Instantaneous Forward Voltage at 4.0A DC
Maximum Average Reverse Current
at Rated DC Blocking Voltage
@T
A
= 25 C
@T
A
= 100
o
C
o
SYMBOL
V
F
I
R
FM420
FM430
.55
2.0
20
FM440
UNITS
Volts
mAmps
mAmps
2002-4
NOTES : 1. Thermal Resistance (Junction to Ambient).
2. Measured at 1 MHz and applied reverse voltage of 4.0 volts.
3. P.C.B Monuted with 0.4X0.4” (10.0X10.0mm
2
) copper pad area.
RATING AND CHARACTERISTIC CURVES ( FM420 THRU FM440 )
FIG. 1 - TYPICAL FORWARD CURRENT
DERATING CURVE
FIG. 2 - TYPICAL REVERSE CHARACTERISTICS
6.0
10
5.0
INSTANTANEOUS REVERSE CURRENT, (mA)
AVERAGE FORWARD CURRENT, (A)
TJ = 125
1.0
4.0
Single Phase
Half Wave 60Hz
Resistive of
Inductive LoadP.C.B Mounted on
0.4X0.4"(10X10mm)
copper pad areas
TJ = 75
3.0
.1
2.0
TJ = 25
.01
1.0
P.C.B Mounted on
0.4X0.4"(10X10mm)
copper pad areas
0
0
INSTANTANEOUS FORWARD CURRENT, (A)
.001
25
50
75
100
125
LEAD TEMPERATURE, ( )
150
0
20
40
60
80
100
120
140
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS
20
FIG. 4 - TYPICAL JUNCTION CAPACITANCE
500
TJ = 25
10
JUNCTION CAPACITANCE, (pF)
TJ = 25
Pulse Width = 300uS
1% Duty Cycle
200
100
50
20
10
5
1.0
.1
.2
.3
.4
.5
.6
.7
.8
.9
INSTANTANEOUS FORWARD VOLTAGE, (V)
PEAK FORWARD SURGE CURRENT, (A)
.1
.2
.5
1
2
5
10 20
REVERSE VOLTAGE, (V)
40
FIG. 5 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT
120
105
90
75
60
45
30
15
1
2
5
10
20
50
NUMBER OF CYCLE AT 60Hz
100
TL = 75
8.3ms Single Half Sine-Wave
(JEDEC Method)
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