RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
SM4933
THRU
SM4937
SURFACE MOUNT GLASS PASSIVATED
FAST RECOVERY SILICON RECTIFIER
VOLTAGE RANGE 50 to 600 Volts CURRENT 1.0 Ampere
FEATURES
*
*
*
*
*
*
*
Fast switching
Glass passivated device
Ideal for surface mounted applications
Low leakage current
Metallurgically bonded construction
Mounting position: Any
Weight: 0.015 gram
MELF
MECHANICAL DATA
* Epoxy : Device has UL flammability classification 94V-0
.205 (5.2)
.190 (4.8)
SOLDERABLE
ENDS
.028 (.60)
.018 (.46)
.106 (2.7)
.095 (2.4)
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%.
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 T
A
= 55
o
C
Peak Forward Surge Current I
FM
(surge): 8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Maximum Thermal Resistance
Typical Junction Capacitance (Note 1)
Operating and Storage Temperature Range
ELECTRICAL CHARACTERISTICS
(At T
A
= 25
o
C unless otherwise noted)
CHARACTERISTICS
Maximum Forward Voltage at 1.0A DC
o
Maximum Full Load Reverse Current,Full cycle Average at T
A
= 55 C
Maximum Average Reverse Current at
Rated DC Blocking Voltage
Maximum Reverse Recovery Time (Note 4)
@T
A
= 25
o
C
o
@T
A
= 125 C
SYMBOL
V
F
I
R
trr
SM4933
SM4934
SM4935
1.2
50
5.0
100
200
SM4936
SM4937
UNITS
Volts
uAmps
uAmps
uAmps
nSec
2001-4
SYMBOL
V
RRM
V
RMS
V
DC
I
O
I
FSM
(Note 2) Rθ
JL
(Note 3) Rθ
JA
C
J
T
J
, T
STG
SM4933
50
35
50
SM4934
100
70
100
SM4935
200
140
200
1.0
30
30
75
15
-65 to + 175
SM4936
400
280
400
SM4937
600
420
600
UNITS
Volts
Volts
Volts
Amps
Amps
0
0
C/ W
C/ W
pF
0
C
NOTES : 1. Measured at 1.0 MHz and applied average voltage of 4.0VDC
2. Thermal resistance junction to terminal 6.0mm
2
copper pads to each terminal.
3. Thermal resistance junction to ambient, 6.0mm
2
copper pads to each terminal.
4. Test Conditions: I
F
= 1.0A, V
R
= 30V.
RATING AND CHARACTERISTIC CURVES ( SM4933 THRU SM4937 )
INSTANTANEOUS REVERSE CURRENT, (uA) AVERAGE FORWARD CURRENT, (A)
FORWARD SURGE CURRENT, (A)
FIG. 1 - TYPICAL FORWARD CURRENT
DERATING CURVE
1.0
.8
.6
.4
.2
0
0
25 50
75 100 125 150 175
AMBIENT TEMPERATURE, ( )
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
FIG. 2 - MAXIMUM NON-REPETITIVE FORWARD
SURGE CURRENT
50
40
30
20
10
8.3ms Single Half Sine-Wave
(JEDED Method)
0
1
2
4 6 8 10 20
40 60 80100
NUMBER OF CYCLES AT 60Hz
INSTANTANEOUS FORWARD CURRENT, (A)
10
4
1.0
.4
.1
.04
FIG. 3 - TYPICAL REVERSE CHARACTERISTICS
20
10
FIG. 4 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
TJ = 25
Pulse Width = 300us
1% Duty Cycle
TJ = 100
1.0
TJ = 25
.01
0
20 40
60 80 100 120 140
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
FIG. 5 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY
TIME CHARACTERISTIC
8
115Va 10K
60Hz 2W 7
6
C.P.CLARE
HPG 1002
5
4
1 AMP
SLO-BLO
FUSE
C1
1.0uF
300V
1
2 3.8uH
3 /1.4
30
50W
NON-INDUCTIVE
UNIT
UNDER TEST
1.0 Adc FROM
CONSTANT
R2
VOLTAGE SUPPLY
C1
1
RIPPLE = 3mVrms MAX
1.0uF
10W
300V
NON-
INDUCTIVE
Zout 11/2
MAX
DC to 2kHz
% CARBON CORE
FOR RECTIFIER
.1
.01
.6
.8
1.0
1.2
1.4
INSTANTANEOUS FORWARD VOLTAGE, (V)
30 Vdc
CONSTANT VOLTAGE
SUPPLY
JUNCTION CAPACITANCE, (pF)
FIG. 6 - TYPICAL JUNCTION CAPACITANCE
200
100
60
40
20
10
6
4
2
1
.1
.2 .4
1.0 2 4
10 20 40
REVERSE VOLTAGE, ( V )
100
TJ = 25
MINIMIZE ALL LEAD LENGTHS
A-TEKTRONIX 545A. K PLUG IN
PRE AMP P6000 PROBE OR EQUIVALENT
R1-ADJUSTED FOR 1.4 BETWEEN
POINT 2 OF RELAY AND RECTIFIER
INDUCTIVE = 3.8uH
trr
IFM 1.0
i(t)
di/dt = 50A/uS
R2-TEN-1W 10
IN PARALLEL
10
TA = 25
0
0
IRM (REC)
SET TIME BASE FOR
50/100 ns/cm
RECTRON
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