Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
The 1KSMB series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Description
Agency Approvals
Features
• 1000W peak pulse power
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
• 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
30kV(Air), 30kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Built-in strain relief
• VBR @ TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT:Temperature
Coefficient, typical value
is 0.1%)
• Glass passivated chip
junction
• Fast response time:
typically less than 1.0ps
from 0V to BV min
• Excellent clamping
capability
• Low incremental surge
resistance
• Typical IR less than 1μA
when VBR max>12V
• High temperature
to reflow soldering
guaranteed: 260°C/40sec
• Plastic package is
flammability rated V-0 per
Underwriters Laboratories
• Meet MSL level1, per
J-STD-020, LF maximun
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
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD-
609A.01)
Applications
TVS devices are ideal for the protection of I/O Interfaces,
VCC bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic
applications.
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power Dissipation at
TA=25ºC by 10/1000µs Waveform
(Fig.2)(Note 1), (Note 2)
PPPM 1000 W
Power Dissipation on Infinite Heat
Sink at TL=50OCPD5.0 W
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3) IFSM 120 A
Maximum Instantaneous Forward
Voltage at 50A for Unidirectional
Only
VF3.5 V
Operating Temperature Range TJ-65 to 150 °C
Storage Temperature Range TSTG -65 to 175 °C
Typical Thermal Resistance Junction
to Lead RθJL 20 °C/W
Typical Thermal Resistance Junction
to Ambient RθJA 100 °C/W
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated above TJ (initial) =25OC per Fig. 3.
2. Mounted on copper pad area of 0.2x0.2” (5.0 x 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.
AGENCY AGENCY FILE NUMBER
E230531
1KSMB Series
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
Bi-directional
Uni-directional
RoHS
Pb
e3
Datasheet
Additional Infomarion
Resources
Samples
Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Number
(Uni)
Part
Number
(Bi)
Marking Reverse
Stand off
Voltage VR
(Volts)
Breakdown
Voltage VBR
(Volts) @ IT
Test
Current
IT
(mA)
Maximum
Clamping
Voltage VC
@ Ipp
(V)
Maximum
Peak
Pulse
Current Ipp
(A)
Maximum
Reverse
Leakage IR
@ VR
(µA)
Agency
Approval
UNI BI MIN MAX
1KSMB6.8A 1KSMB6.8CA A10A N10A 5.80 6.45 7. 1 4 10 10.5 95.2 900 x
1KSMB7.5A 1KSMB7.5CA A10B N10B 6.40 7. 1 3 7.88 10 11. 3 88.5 400 x
1KSMB8.2A 1KSMB8.2CA A10C N10C 7.02 7.79 8.61 10 12.1 82.6 180 x
1KSMB9.1A 1KSMB9.1CA A10D N10D 7.78 8.65 9.55 1 13.4 74.6 45 x
1KSMB10A 1KSMB10CA A10E N10E 8.55 9.50 10.50 1 14.5 69.0 8 x
1KSMB11A 1KSMB11CA A10F N10F 9.40 10.50 11.60 1 15.6 64.1 4 x
1KSMB12A 1KSMB12CA A10G N10G 10.20 11.40 12.60 1 16.7 59.9 1 x
1KSMB13A 1KSMB13CA A10H N10H 11. 10 12.40 13.70 1 18.2 54.9 1 x
1KSMB15A 1KSMB15CA A10I N10I 12.80 14.30 15.80 1 21.2 47.2 1 x
1KSMB16A 1KSMB16CA A10J N10J 13.60 15.20 16.80 1 22.5 44.4 1 x
1KSMB18A 1KSMB18CA A10K N10K 15.30 1 7. 1 0 18.90 1 25.5 39.2 1 x
1KSMB20A 1KSMB20CA A10L N10L 1 7. 1 0 19.00 21.00 1 27.7 36.1 1 x
1KSMB22A 1KSMB22CA A10M N10M 18.80 20.90 23.10 1 30.6 32.7 1 x
1KSMB24A 1KSMB24CA A10N N10N 20.50 22.80 25.20 1 33.2 30.1 1 x
1KSMB27A 1KSMB27CA A10O N10O 23.10 25.70 28.40 1 37.5 26.7 1 x
1KSMB30A 1KSMB30CA A10P N10P 25.60 28.50 31.50 1 41.4 24.2 1 x
1KSMB33A 1KSMB33CA A10Q N10Q 28.20 31.40 34.70 1 45.7 21.9 1 x
1KSMB36A 1KSMB36CA A10R N10R 30.80 34.20 37.80 1 49.9 20.0 1 x
1KSMB39A 1KSMB39CA A10S N10S 33.30 37.10 41.00 1 53.9 18.6 1 x
1KSMB43A 1KSMB43CA A10T N10T 36.80 40.90 45.20 1 59.3 16.9 1 x
1KSMB47A 1KSMB47CA A10U N10U 40.20 44.70 49.40 1 64.8 15.4 1 x
1KSMB51A 1KSMB51CA A10V N10V 43.60 48.50 53.60 1 70.1 14.3 1 x
1KSMB56A 1KSMB56CA A10W N10W 47.80 53.20 58.80 1 77.0 13.0 1 x
1KSMB62A 1KSMB62CA A10X N10X 53.00 58.90 65.10 1 85.0 11. 8 1 x
1KSMB68A 1KSMB68CA A10Y N10Y 58.10 64.60 71.40 1 92.0 10.9 1 x
1KSMB75A 1KSMB75CA A10Z N10Z 64.10 71.30 78.80 1 103.0 9.7 1 x
1KSMB82A 1KSMB82CA B10A O10A 70.10 77.90 86.10 1 113.0 8.8 1 x
1KSMB91A 1KSMB91CA B10B O10B 77.80 86.50 95.50 1 125.0 8.0 1 x
1KSMB100A 1KSMB100CA B10C O10C 85.50 95.00 105.00 1 137.0 7. 3 1 x
1KSMB110A 1KSMB110CA B10D O10D 94.00 105.00 116.00 1 152.0 6.6 1 x
1KSMB120A 1KSMB120CA B10E O10E 102.00 114.00 126.00 1 165.0 6.1 1 x
1KSMB130A 1KSMB130CA B10F O10F 111.0 0 124.00 137.00 1 179.0 5.6 1 x
1KSMB150A 1KSMB150CA B10G O10G 128.00 143.00 158.00 1 207.0 4.8 1 x
1KSMB160A 1KSMB160CA B10H O10H 136.00 152.00 168.00 1 219.0 4.6 1 x
1KSMB170A 1KSMB170CA B10I O10I 144.50 162.00 179.00 1 234.0 4.3 1 x
1KSMB180A 1KSMB180CA B10J O10J 153.00 171.00 189.00 1 246.0 4.1 1 x
For bidirectional type having VR of 10 volts and less, the IR limit is double.
For parts without A VBR is ± 10% and VC is 5% higher than with A parts.
Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
I-V Curve Characteristics
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
1
10
100
0.001 0.01 0.11
t
d
-Pulse Width (ms)
P
PPM
-Peak Pulse Power (kW)
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
TJ initial = Tamb
Figure 2 - Peak Pulse Power Rating Curve
Figure 1 - TVS Transients Clamping Waveform
Voltage Transients
Time
Voltage Across TVS
Current Through TVS
Vc VBR VR
IR
IT
Ipp
V
Uni-directional
VF
Vc VBR VR
IR
IT
Ipp
V
Vc
VBR
VR
Ipp
IR
IT
Bi-directional
PPPM Peak Pulse Power Dissipation -- Max power dissipation
VR Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation
VBR Breakdown Voltage -- Maximum voltage that flows though the TVS at a specified test current (IT)
VC Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
IR Reverse Leakage Current -- Current measured at VR
VF Forward Voltage Drop for Uni-directional
continues on next page.
Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
IPPM- Peak Pulse Current, % IRSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM ( )
1
10
100
1000
10000
1.010.0100.0 1000.0
Cj (pF)
Tj=25C
f=1.0MHz
Vsig=50mVp-p
Uni-directional V=0V
Bi-directional V=0V
V
BR
- Reverse Breakdown Voltage (V)
Uni-directional @V
R
Bi-directional @V
R
Figure 3 - Peak Pulse Power Derating Curve Figure 4 - Pulse Waveform
Figure 5 - Typical Junction Capacitance
0
20
40
60
80
100
120
110100
Number of Cycles at 60 Hz
IFSM - Peak Forward Surge Current
(A)
Figure 7 - Maximum Non-Repetitive Peak Forward
Surge Current Uni-Directional Only
Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)
0
20
40
60
80
100
0255075100 125 175
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage %
150
TJ - Initial Junction Temperature (ºC)
Figure 6 - Typical Transient Thermal Impedance
0.01
0.1
1
10
100
0123456
IF- Peak Forward Current(A)
VF-Peak Forward Voltage(V)
Figure 8 - Peak Forward Voltage Drop vs Peak Forward
Current (Typical Values)
0.1
1
10
100
1000
0.001
0.01 0.11 10 100 1000
Transient Thermal Impedance (°C/W)
T -Pulse Duration (s)
P
Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
Physical Specifications
Weight 0.003 ounce, 0.093 grams
Case JEDEC DO214AA. Molded plastic body
over glass passivated junction
Polarity Color band denotes cathode except
Bidirectional.
Terminal Matte Tin-plated leads, Solderable per
JESD22-B102
Soldering Parameters
Temperature (T)
Time (t)
Ts(min)
Ts(max)
TL
TP
ts
Preheat
tL
tp
Ramp-up Critical Zone
TL to TP
Ramp-down
t 25˚C to Peak
25˚C
Reflow Condition Lead–free
assembly
Pre Heat
- Temperature Min (Ts(min)) 150°C
- Temperature Max (Ts(max)) 200°C
- Time (min to max) (ts) 60 – 180 secs
Average ramp up rate (Liquidus Temp (TA)
to peak 3°C/second max
TS(max) to TA - Ramp-up Rate 3°C/second max
Reflow - Temperature (TA) (Liquidus) 217°C
- Time (min to max) (ts) 60 – 150 seconds
Peak Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Do not exceed 260°C
Dimensions
Inches Millimeters
Min Max Min Max
A 0.077 0.086 1.950 2.200
B 0.160 0.180 4.060 4.570
C 0.130 0.155 3.300 3.940
D 0.084 0.096 2.130 2.440
E 0.030 0.060 0.760 1.520
F - 0.008 - 0.203
G 0.205 0.220 5.210 5.590
H 0.006 0.012 0.152 0.305
I 0.089 - 2.260 -
J 0.085 - 2.160 -
K - 0.107 - 2.740
L 0.085 - 2.160 -
Dimensions
A
D
EG
F
H
C
B
Cathode Band
(for Uni-directional products only)
DO-214AA (SMB J-Bend)
(all dimensions in mm)
I
L
K
J
Solder Pads
Environmental Specifications
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Temperature Cycling JESD22-A104
MSL JEDEC-J-STD-020, Level 1
H3TRB JESD22-A101
RSH JESD22-A111
Transient Voltage Suppression Diodes
© 2015 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/20/15
Surface Mount – 1000W > 1KSMB series
Part Numbering System
Packaging
Part number Component
Package Quantity Packaging
Option
Packaging
Specification
1KSMBxxxXX DO-214AA 3000 Tape & Reel - 12mm tape/13” reel EIA STD RS-481
Part Marking System
V
BR
VOLTAGE
BI-DIRECTIONAL
5%
V
BR
VOLTAGE TOLERANCE
SERIES
1KSMB XXX CA
Tape and Reel Specification
0.47
(12.0)
0.315
(8.0)
0.157
(4.0)
0.49
(12.5)
0.80 (20.2)
Arbor Hole Dia.
13.0 (330)
Dimensions are in inches
(and millimeters).
Direction of Feed
0.059 DIA
(1.5) Cover tape
Cathode
F
XX
YMXXX
Marking Code
Trace Code Marking
Y:Year Code
M: Month Code
XXX: Lot Code
Littelfuse Logo
Cathode Band
(for Uni-directional products only)