PROTECTION PRODUCTS
Description
RailClamps are surge rated diode arrays designed to
protect high speed data interfaces. The SR series has
been specifically designed to protect sensitive compo-
nents which are connected to data and transmission
lines from overvoltage caused by electrostatic dis-
charge
(ESD),
electrical fast transients
(EFT),
and
lightning.
The unique design of the SR series devices incorpo-
rates four surge rated, low capacitance steering diodes
and a TVS diode in a single package. During transient
conditions, the steering diodes direct the transient to
either the positive side of the power supply line or to
ground. The internal TVS diode prevents over-voltage
on the power line, protecting any downstream compo-
nents.
The low capacitance array configuration allows the user
to protect two high-speed data or transmission lines.
The low inductance construction minimizes voltage
overshoot during high current surges.
RailClamp
Low Capacitance TVS Diode Array
Features
ESD protection to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 24A (8/20µs)
Array of surge rated diodes with internal TVS Diode
Protects two I/O lines
Low capacitance (<10pF) for high-speed interfaces
Low clamping voltage
Low operating voltage: 5.0V
Solid-state silicon-avalanche technology
SR05
Mechanical Characteristics
JEDEC SOT-143 package
UL 497B listed
Molding compound flammability rating: UL 94V-0
Marking : R05
Packaging : Tape and Reel per EIA 481
Applications
USB Power & Data Line Protection
Ethernet 10BaseT
I
2
C Bus Protection
Video Line Protection
T1/E1 secondary IC Side Protection
Portable Electronics
Microcontroller Input Protection
WAN/LAN Equipment
ISDN S/T Interface
Circuit Diagram
Pin 4
Schematic & PIN Configuration
1
Pin 2
Pin 3
4
2
Pin 1
3
SOT-143 (Top View)
Revision 02/18/05
1
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