RClamp2574NQ
High Power TVS for
Ethernet Interfaces
PROTECTION PRODUCTS - RailClamp®
Description
Features
RailClamp® TVS diodes are specifically designed to
protect sensitive components which are connected to
high-speed data and transmission lines from overvolt-
age caused by ESD (electrostatic discharge), CDE
(cable discharge events), and EFT (electrical fast
transients).
Transient protection for high-speed data lines to
IEC 61000-4-2 (ESD) ±30kV (air), ±30kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 40A (8/20µs)
Array of surge rated diodes with internal TVS Diode
Small package saves board space
Protects two line pairs
Low capacitance for high-speed interfaces
Low variation in capacitance vs. bias voltage
Low clamping voltage
The unique design incorporates surge rated, low
capacitance steering diodes and a TVS diode in a
single package. The RClamp®2574NQ is designed to
replace up to two components for board level GbE
protection. Each device is designed to protect two line
pairs. This is accomplished by routing traces through
the device. When connected in this fashion, the
device can withstand a high level of surge current
(40A, 8/20us) while maintaining a low loading capaci-
tance of less than 5pF. The high surge capability
means it can be used in high threat environments in
applications such as Gigabit Ethernet, telecommunica-
tion lines, and LVDS interfaces.
The RClamp®2574NQ is constructed using Semtech’s
proprietary EPD process technology. The EPD process
provides low stand-off voltages with significant reduc-
tions in leakage current and capacitance over silicon-
avalanche diode processes. It features a true operat-
ing voltage of 2.5 volts for superior protection.
Qualified to AEC-Q100 Grade1
Solid-state silicon-avalanche technology
Mechanical Characteristics
SLP3020N10 10L package
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Nominal Dimensions: 3.0 x 2.0 x 0.60 mm
Lead Finish: NiPdAu
Molding compound flammability rating: UL 94V-0
Marking : Marking code + Date code
Packaging : Tape and Reel
Applications
10/100/1000 Ethernet
Central Office Equipment
LVDS Interfaces
MagJacks / Integrated Magnetics
Notebooks / Desktops / Servers
The RClamp2574NQ is in a 10-pin SLP3020N10
package. It measures 3.0 x 2.0 x 0.60mm. The leads
are finished with lead-free NiPdAu.
RClamp®2574NQ is qualified to AEC-Q100 Grade 1.
Schematic
Pin Configuration
Pin 1
LINE 1 In
Pin 4
LINE 3 In
1
10
Line 1 In
Line 2 In
Line 1 Out
Line 2 Out
GND
GND
GND
GND
Pin 10
Pin 7
LINE 1 Out
LINE 3 Out
Pin 2
Pin 5
GND
LINE 2 In
LINE 4 In
Line 3 In
Line 4 In
Line 3 Out
Line 4 Out
5
6
Pin 9
Pin 6
LINE 2 Out
LINE 4 Out
Center Tabs
and Pins 3, 8
www.semtech.com
Revision 11/11/2011
1