Transient Voltage Suppression Diodes
Surface Mount – 1000W
RoHS
1KSMB Series
Description
The 1KSMB series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Features
less than 1μA
above 12V
R
applications to optimize
board space
soldering guaranteed:
260°C/40 seconds at
terminals
Underwriters Laboratory
Flammability 94V-O
Plated
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
temperature coefficient
Δ V
BR
= 0.1% × V
BR
@25°C
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Peak Pulse Power Dissipation at
T
A
=25ºC by 10x1000μs waveform
(Fig.1)(Note 1), (Note 2)
Power Dissipation on infinite heat
sink at T
A
=50
O
C
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
Maximum Instantaneous Forward
Voltage at 50A for Unidirectional
only (Note 4)
Operating Junction and Storage
Temperature Range
Typical Thermal Resistance Junction
to Lead
Typical Thermal Resistance Junction
to Ambient
Symbol
P
PPM
P
M(AV)
I
FSM
V
F
T
J
, T
STG
R
uJL
R
uJA
Value
1000
5.0
100
3.5V/5.0
-65 to 150
20
100
Unit
W
W
A
V
°C
°C/W
°C/W
capability at 10×1000μs
waveform, repetition rate
(duty cycles):0.01%
typically less than 1.0ps
from 0V to BV min
capability
resistance
Voltage from 6.8V
to 160V specially
designed for automotive
applications
in compact package:
bridges the gap between
600W and 1.5KW
Applications
TVS devices are ideal for the protection of I/O Interfaces,
V
CC
bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
Notes:
1. Non-repetitive current pulse , per Fig. 3 and derated above T
A
= 25
O
C per Fig. 2.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional
device only, duty cycle=4 per minute maximum.
_
_
4. V
F
<3.5V for V
BR
<
50V and V
F
<5.0V for V
BR
>
51V.
1KSMB Series
Specifications are subject to change without notice.
25
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©2007 Littelfuse
Transient Voltage Suppression Diodes
Surface Mount – 1000W
Electrical Characteristics
Part
Number
(Uni)
1KSMB6.8A
1KSMB7
.5A
1KSMB8.2A
1KSMB9.1A
1KSMB10A
1KSMB11A
1KSMB12A
1KSMB13A
1KSMB15A
1KSMB16A
1KSMB18A
1KSMB20A
1KSMB22A
1KSMB24A
1KSMB27A
1KSMB30A
1KSMB33A
1KSMB36A
1KSMB39A
1KSMB43A
1KSMB47A
1KSMB51A
1KSMB56A
1KSMB62A
1KSMB68A
1KSMB75A
1KSMB82A
1KSMB91A
1KSMB100A
1KSMB110A
1KSMB120A
1KSMB130A
1KSMB150A
1KSMB160A
Part
Number
(Bi)
1KSMB6.8CA
1KSMB7
.5CA
1KSMB8.2CA
1KSMB9.1CA
1KSMB10CA
1KSMB11CA
1KSMB12CA
1KSMB13CA
1KSMB15CA
1KSMB16CA
1KSMB18CA
1KSMB20CA
1KSMB22CA
1KSMB24CA
1KSMB27CA
1KSMB30CA
1KSMB33CA
1KSMB36CA
1KSMB39CA
1KSMB43CA
1KSMB47CA
1KSMB51CA
1KSMB56CA
1KSMB62CA
1KSMB68CA
1KSMB75CA
1KSMB82CA
1KSMB91CA
1KSMB100CA
1KSMB110CA
1KSMB120CA
1KSMB130CA
1KSMB150CA
1KSMB160CA
Marking
UNI
A10A
A10B
A10C
A10D
A10F
A10G
A10H
A10I
A10J
A10K
A10L
A10M
A10N
A10O
A10P
A10Q
A10R
A10S
A10T
A10U
A10V
A10W
A10X
A10Y
A10Z
B10A
B10B
B10C
B10D
B10F
B10G
B10H
BI
N10A
N10B
N10C
N10D
N10F
N10G
N10H
N10I
N10J
N10K
N10L
N10M
N10N
N10O
N10P
N10Q
N10R
N10S
N10T
N10U
N10V
N10W
N10X
N10Y
N10Z
O10A
O10B
O10C
O10D
O10F
O10G
O10H
Reverse
Stand off
Voltage V
R
(Volts)
5.80
6.40
7
.02
7
.78
8.55
9.40
10.20
11.10
12.80
13.60
15.30
17
.10
18.80
20.50
23.10
25.60
28.20
30.80
33.30
36.80
40.20
43.60
47
.80
53.00
58.10
64.10
70.10
77
.80
85.50
94.00
102.00
111.00
128.00
136.00
Breakdown
Voltage V
BR
(Volts) @ I
T
MIN
6.45
7
.13
7
.79
8.65
9.50
10.50
11.40
12.40
14.30
15.20
17
.10
19.00
20.90
22.80
25.70
28.50
31.40
34.20
37
.10
40.90
44.70
48.50
53.20
58.90
64.60
71.30
77
.90
86.50
95.00
105.00
114.00
124.00
143.00
152.00
MAX
7
.14
7
.88
8.61
9.55
10.50
11.60
12.60
13.70
15.80
16.80
18.90
21.00
23.10
25.20
28.40
31.50
34.70
37
.80
41.00
45.20
49.40
53.60
58.80
65.10
71.40
78.80
86.10
95.50
105.00
116.00
126.00
137
.00
158.00
168.00
Maximum Maximum Maximum
Test
Agency
Peak
Reverse
Current Clamping
Approval
Voltage V
C
Pulse
Leakage I
R
I
T
@ I
pp
Current I
pp
@ V
R
(mA)
(V)
(A)
(μA)
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10.5
11.3
12.1
13.4
14.5
15.6
16.7
18.2
21.2
22.5
25.5
27
.7
30.6
33.2
37
.5
41.4
45.7
49.9
53.9
59.3
64.8
70.1
77
.0
85.0
92.0
103.0
113.0
125.0
137
.0
152.0
165.0
179.0
207
.0
219.0
95.2
88.5
82.6
74.6
69.0
64.1
59.9
54.9
47
.2
44.4
39.2
36.1
32.7
30.1
26.7
24.2
21.9
20.0
18.6
16.9
15.4
14.3
13.0
11.8
10.9
9.7
8.8
8.0
7
.3
6.6
6.1
5.6
4.8
4.6
900
400
180
45
8
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
For bidirectional type having V
R
of 10 volts and less, the I
R
limit is double.
BR
is ± 10%) is not avaliable.
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©2007 Littelfuse
26
1KSMB Series
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
Surface Mount – 1000W
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Figure 1 - Peak Pulse Power Rating Curve
100
Figure 2 - Pulse Derating Curve
100
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
P
PPM
-Peak Pulse Power (kW)
80
60
10
40
20
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
1
0.000001
0.00001
0.0001
0.001
0
0
25
50
75
100
125
150
175
t
d
-Pulse Width (sec.)
T
A
-Ambient temperature (ºC)
Figure 3 - Pulse Waveform
150
I
PPM
- Peak Pulse Current, % I
RSM
tr=10μsec
Peak Value
IPPM
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to
50%
of IPPM
Figure 4 - Typical Junction Capacitance
10000
Bi-directional V=0V
Uni-directional V=0V
Uni-directional @V
R
1000
100
Half Value
IPPM
IPPM
2
Cj (pF)
( )
10/1000μsec. Waveform
as defined by R.E.A
100
Bi-directional @V
R
50
10
Tj=25C
f=1.0MHz
Vsig=50mVp-p
0
td
0
1.0
2.0
t-Time (ms)
3.0
4.0
1
1.0
10.0
100.0
1000.0
V
BR
- Reverse Breakdown Voltage (V)
Figure 5 - Steady State Power Dissipation Derating
Curve
6
P
M(AV)
, Steady State Power Dissipation
(W)
5
4
3
2
1
0
0
25
50
75
100
125
150
175
T
A
- Ambient Temperature(ºC)
Figure 6 - Maximum Non-Repetitive Peak Forward
Surge Current Uni-Directional Only
120
I
FSM
- Peak Forward Surge Current
(A)
100
80
60
40
20
0
1
10
Number of Cycles at 60 Hz
100
1KSMB Series
Specifications are subject to change without notice.
27
www.littelfuse.com
©2007 Littelfuse
Transient Voltage Suppression Diodes
Surface Mount – 1000W
Soldering Parameters
Reflow Condition
T
P
t
p
Ramp-up
Critical Zone
T
L
to T
P
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Time (min to max) (t
s
)
150°C
200°C
Temperature (T)
T
L
T
s(max)
t
L
3°C/second max
3°C/second max
217°C
260
+0/-5
°C
Ramp-down
T
s(min)
t
s
Preheat
25˚C
t 25˚C to Peak
Time (t)
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
6°C/second max
8 minutes Max.
280°C
Physical Specifications
Weight
Case
Polarity
Terminal
Color band denotes cathode except
Bidirectional.
Matte Tin-plated leads, Solderable per
0.003 ounce, 0.093 grams
Environmental Specifications
Temperature Cycle
Pressure Cooker
High Temp. Storage
HTRB
Thermal Shock
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©2007 Littelfuse
28
1KSMB Series
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
Surface Mount – 1000W
Dimensions
DO-214AA (SMB J-Bend)
Dimensions
Cathode Band
Inches
Min
0.077
0.160
0.130
0.084
0.030
-
0.205
0.006
0.089
0.085
-
0.085
Max
0.086
0.180
0.155
0.096
0.060
0.008
0.220
0.012
-
-
0.107
-
Millimeters
Min
1.950
4.060
3.300
2.130
0.760
-
5.210
0.152
2.260
2.160
-
2.160
Max
2.200
4.570
3.940
2.440
1.520
0.203
5.590
0.305
-
-
2.740
-
A
A
B
H
D
F
G
C
B
C
D
F
G
H
I
J
E
J
K
L
K
L
I
Part Numbering System
1KSMB XXX C A
Part Marking System
Cathode Band
XXX
5%
VOLTAGE TOLERANCE
BI-DIRECTIONAL
VOLTAGE
SERIES
F
Littelfuse Logo
Marking Code
Packaging
Part number
1KSMBxxxXX
Component
Package
DO-214AA
Quantity
3000
Packaging
Option
Packaging
Specification
1KSMB Series
Specifications are subject to change without notice.
29
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©2007 Littelfuse
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