TransientVoltage Suppression Diodes
Surface Mount – 1000W > 1KSMB series
RoHS
1KSMB Series
Description
Uni-directional
The 1KSMB series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Bi-directional
Features
• RoHS compliant
• Fast response time:
typically less than 1.0ps
from 0V to BV min
• For surface mounted
applications to optimize
board space
• Excellent clamping
capability
• Low profile package
• Low incremental surge
resistance
• Typical IR less than 1µA
above 12V
• High temperature
soldering guaranteed:
260°C/40 seconds at
terminals
•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
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E128662
Maximum Ratings andThermal Characteristics
(TA=25°C unless otherwise noted)
15kV(Air), 8kV (Contact)
• Plastic package has
underwriters laboratory
flammability 94V-O
• Meet MSL level1, per
J-STD-020, LF maximum
peak of 260°C
Parameter
Symbol
Value
Unit
• 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
• VBR @TJ= VBR@25°C × (1+αT
x (TJ - 25))
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 atTA=50°C
PM(AV)
IFSM
5.0
W
• Matte tin lead–free Plated
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3)
100
A
• Available in breakdown
Voltage from 6.8V to 180V
specially designed for
Maximum Instantaneous Forward
Voltage at 50A for Unidirectional
Only (Note 4)
VF
3.5V/5.0
V
automotive applications
(αT:Temperature Coefficient)
Operating Junction and Storage
Temperature Range
TJ, TSTG -55 to 150
°C
• Offers high-surge rating in
compact package: bridges
the gap between 600W
and 1.5KW
• Halogen free and RoHS
compliant
• Glass passivated chip
junction
• 1000W peak pulse power
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
TypicalThermal Resistance Junction
to Lead
RuJL
RuJA
20
°C/W
°C/W
TypicalThermal Resistance Junction
to Ambient
100
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated aboveTA = 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.
Applications
4. VF<3.5V for VBR<_ 50V and VF<5.0V for VBR>_ 51V.
TVS devices are ideal for the protection of I/O Interfaces,
CC bus and other vulnerable circuits used inTelecom,
Computer, Industrial and Consumer electronic applications.
V
Functional Diagram
Additional Information
Bi-directional
Cathode
Anode
Datasheet
Resources
Samples
Uni-directional
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 01/20/14