3. A transient suppressor is normally selected according to the Working Peak Reverse Voltage (V
RWM
) which should be equal to or greater
than the DC or continuous peak operating voltage level.
4. V
BR
measured at pulse test current I
T
at ambient temperature of 25°C.
Z
in
V
in
LOAD
V
L
Figure 1. Typical Protection Circuit
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2
1SMF16BT1, 1SMF16BT3, 1SMF16BT3G
10,000
t
r
PP, PEAK POWER (WATTS)
1000
100
VALUE (%)
PEAK VALUE − I
RSM
PULSE WIDTH (t
P
) IS DEFINED
AS THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50%
OF I
RSM
.
t
r
≤
10
ms
100
50
t
P
I
HALF VALUE −
RSM
2
10
1.0
10
100
t
P
, PULSE WIDTH (ms)
1000
10,000
0
0
1
2
t, TIME (ms)
3
4
Figure 2. Pulse Rating Curve
Figure 3. 10 X 1000
ms
Pulse Waveform
100
90
% OF PEAK PULSE CURRENT
80
70
60
50
40
30
20
10
0
0
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ T = 25
°
C
A
t
r
PEAK VALUE I
RSM
@ 8
ms
PULSE WIDTH (t
P
) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAY = 8
ms
HALF VALUE I
RSM
/2 @ 20
ms
160
140
120
100
80
60
40
20
0
0
25
50
75
100
125
150
t
P
20
40
t, TIME (ms)
60
80
T
A
, AMBIENT TEMPERATURE (°C)
Figure 4. 8 X 20
ms
Pulse Waveform
Figure 5. Pulse Derating Curve
1
0.7
0.5
DERATING FACTOR
0.3
0.2
0.1
0.07
0.05
0.03
0.02
10
ms
0.01
0.1 0.2
0.5
1
2
5
10
20
50 100
100
ms
PULSE WIDTH
10 ms
CAPACITANCE (pF)
300
250
200
150
1 ms
100
50
0
2
4
6
8
10
12
14
16
REVERSE VOLTAGE (V)
D, DUTY CYCLE (%)
Figure 6. Typical Derating Factor for Duty Cycle
Figure 7. Capacitance versus Reverse Voltage
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3
1SMF16BT1, 1SMF16BT3, 1SMF16BT3G
PACKAGE DIMENSIONS
SOD−123FL
CASE 498−01
ISSUE O
B
L
E
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH.
4. DIMENSIONS D AND J ARE TO BE MEASURED
ON FLAT SECTION OF THE LEAD: BETWEEN 0.10
AND 0.25 MM FROM THE LEAD TIP.
DIM
A
B
C
D
E
H
J
K
L
MILLIMETERS
MIN
MAX
1.50
1.80
2.50
2.90
0.90
1.00
0.70
1.10
0.55
0.95
0.00
0.10
0.10
0.20
3.40
3.80
0
°
8
°
INCHES
MIN
MAX
0.059
0.071
0.098
0.114
0.035
0.039
0.028
0.043
0.022
0.037
0.000
0.004
0.004
0.008
0.134
0.150
0
°
8
°
A
H
C
D
POLARITY INDICATOR
OPTIONAL AS NEEDED
K
L
J
SOLDERING FOOTPRINT*
0.91
0.036
2.36
0.093
4.19
0.165
SOD−123
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ON Semiconductor
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