Transient Voltage Suppression Diodes
Surface Mount – 1000W > 1KSMB series
1KSMB Series
Uni-directional
Bi-directional
Description
RoHS
The 1KSMB series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Features
• RoHS compliant
• For surface mounted
applications to optimize
board space
• Low profile package
• Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
15kV(Air), 8kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2 (IEC801-2)
• EFT protection of data
lines in accordance with
IEC 61000-4-4 (IEC801-4)
• Built-in strain relief
•
V
BR
@T
J
= V
BR
@25°C × (1+
α
T
x (T
J
- 25))
(αT:
Temperature Coefficient)
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Maximum Ratings and Thermal Characteristics
(T
A
=25°C unless otherwise noted)
Parameter
Peak Pulse Power Dissipation at
T
A
=25ºC by 10/1000µs Waveform
(Fig.2)(Note 1), (Note 2)
Power Dissipation on Infinite Heat
Sink at T
A
=50°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
-55 to 150
20
100
Unit
W
W
A
V
°C
°C/W
°C/W
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated above T
A
= 25°C per Fig. 3.
2. Mounted on copper pad area of 0.2x0.2” (5.0 × 5.0mm) to each terminal.
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.
_
_
• Glass passivated chip
junction
• 1000W peak pulse power
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
Applications
• Fast response time:
typically less than 1.0ps
from 0V to BV min
• Excellent clamping
capability
• Low incremental surge
resistance
• Typical I
R
less than 1µA
above 12V
• High temperature
soldering guaranteed:
260°C/40 seconds at
terminals
• Plastic package has
underwriters laboratory
flammability 94V-O
• Meet MSL level1, per
J-STD-020, LF maximum
peak of 260°C
• Matte tin lead–free Plated
• Available in breakdown
Voltage from 6.8V to 180V
specially designed for
automotive applications
• Offers high-surge rating in
compact package: bridges
the gap between 600W
and 1.5KW
• Halogen free and RoHS
compliant
Functional Diagram
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.
Additional Information
Bi-directional
Cathode
Uni-directional
Anode
Datasheet
Resources
Samples
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/13/13
1KSMB Series
Surface Mount – 1000W > 1KSMB series
Transient Voltage Suppression Diodes
Electrical Characteristics
.(T
A
=25°C unless otherwise noted)
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
1KSMB170A
1KSMB180A
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
1KSMB170CA
1KSMB180CA
Marking
UNI
A10A
A10B
A10C
A10D
A10E
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
B10E
B10F
B10G
B10H
B10I
B10J
BI
N10A
N10B
N10C
N10D
N10E
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
O10E
O10F
O10G
O10H
O10I
O10J
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
144.50
153.00
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
162.00
171.00
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
179.00
189.00
Maximum Maximum Maximum
Test
Agency
Peak
Reverse
Current Clamping
Approval
Voltage
Pulse
Leakage
I
T
V
C
@ I
pp
Current I
pp
I
R
@ 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
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
234.0
246.0
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
4.3
4.1
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
1
1
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
For bidirectional type having V
R
of 10 volts and less, the I
R
limit is double.
For parts without A V
BR
is ± 10% and V
C
is 5% higher than with A parts.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/13/13
Transient Voltage Suppression Diodes
Surface Mount – 1000W > 1KSMB series
I-V Curve Characteristics
Uni-directional
Bi-directional
I
pp
Vc V
BR
V
R
I
R
V
F
I
T
V
Vc V
BR
V
R
I
T
I
R
I
R
I
T
V
R
V
BR
Vc
V
I
pp
I
pp
P
PPM
Peak Pulse Power Dissipation
-- Max power dissipation
V
R
Stand-off Voltage
-- Maximum voltage that can be applied to the TVS without operation
V
BR
Breakdown Voltage
-- Maximum current that flows though the TVS at a specified test current (I
T
)
V
C
Clamping Voltage
-- Peak voltage measured across the suppressor at a specified Ippm (peak impulse current)
I
R
Reverse Leakage Current
-- Current measured at V
R
V
F
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted)
Figure 1 - TVS Transients Clamping Waveform
Voltage Transients
Figure 2 - Peak Pulse Power Rating Curve
100
P
PPM
-Peak Pulse Power (kW)
Voltage Across TVS
Voltage or Current
Current Through TVS
10
0.2x0.2" (5.0x5.0mm)
1
Copper Pad Area
0.000001
Time
0.00001
0.0001
0.001
t
d
-Pulse Width (sec.)
continues on next page.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/13/13
Surface Mount – 1000W > 1KSMB series
Transient Voltage Suppression Diodes
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted)
(Continued)
Figure 3 - Pulse Derating Curve
100
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
80
60
40
20
0
I
PPM
- Peak Pulse Current, % I
RSM
Figure 4 - Pulse Waveform
150
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
100
Half Value
IPPM
IPPM
2
( )
10/1000µsec. Waveform
as defined by R.E.A
50
0
25
50
75
100
125
150
175
0
td
0
1.0
2.0
t-Time (ms)
3.0
4.0
T
A
-Ambient temperature (ºC)
Figure 5 - Typical Junction Capacitance
10000
Bi-directional V=0V
Figure 6 - Steady State Power Dissipation Derating
Curve
6
P
M(AV)
, Steady State Power Dissipation
(W)
1000
Uni-directional @V
R
Uni-directional V=0V
5
4
3
2
1
0
Cj (pF)
100
Bi-directional @V
R
10
Tj=25C
f=1.0MHz
Vsig=50mVp-p
1
1.0
10.0
100.0
1000.0
0
25
50
75
100
125
150
175
V
BR
- Reverse Breakdown Voltage (V)
T
A
- Ambient Temperature(ºC)
Figure 7 - 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
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/13/13
Transient Voltage Suppression Diodes
Surface Mount – 1000W > 1KSMB series
Soldering Parameters
Reflow Condition
- 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
)
Lead–free assembly
150°C
200°C
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
280°C
Temperature (T)
T
P
Ramp-up
t
p
Critical Zone
T
L
to T
P
T
L
T
s(max)
t
L
T
s(min)
Ramp-down
Preheat
t
s
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
Environmental Specifications
High Temp. Storage
HTRB
Thermal Shock
MSL
H3TRB
RSH
JESD22-A103
JESD22-A108
JESD22-A106
JEDEC-J-STD-020C, Level 1
JESD22-A101
JESD22-B106C
Physical Specifications
Weight
Case
Polarity
Terminal
0.003 ounce, 0.093 grams
JEDEC DO214AA. Molded plastic body
over glass passivated junction
Color band denotes cathode except
Bidirectional.
Matte Tin-plated leads, Solderable per
JESD22-B102D
Dimensions
DO-214AA (SMB J-Bend)
(for uni-directional products only)
Cathode Band
Dimensions
A
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
B
H
D
F
J
C
B
C
D
E
F
G
H
I
E
Dimension in inches and (millimeters)
G
K
L
J
K
L
I
© 2013 Littelfuse, Inc.
(all dimensions in mm)
Specifications are subject to change without notice.
Revised: 09/13/13
Solder Pads
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