Page 1
TVS Diode Arrays (SPA
RoHS
GREEN
SOT-143-4
GND
I/O 1
Vcc
I/O 2
®
Diodes)
Lightning Surge Protection- SR70 Series
SR70 Series 70V 40A Diode Array
Pinout
Pb
Description
The SR70 consists of four, low capacitance, rail-to-rail
diodes that provide protection against ESD and lightning
surge events.These robust diodes can safely absorb up to
40A (t
=8/20μs) and repetitive ESD strikes at the maximum
P
level (Level 4) specified in the IEC 61000-4-2 international
standard without performance degradation.
Its low loading capacitance makes it ideal for protecting
high-speed data lines such as VDSL and VDSL2.
Features
• ESD, IEC61000-4-2 ,
±30kV contact discharge,
±30kV air discharge
• EFT, IEC61000-4-4, 80A
(t
=5/50ns)
p
• Lightning protection,
IEC61000-4-5, 40A
(t
=8/20µs)
p
• Low capacitance of 2.0pF
(TYP) per I/O
• Low clamp voltage
• Small SOT143 (JEDEC TO-
253) packaging
Functional Block Diagram
Additional Information
Datasheet
Resources
Samples
Life Support Note:
Not Intended for Use in Life Support or Life Saving Applications
The products shown herein are not designed for use in life sustaining or life
saving applications unless otherwise expressly indicated.
Applications
• xDSL Lines
• Video Lines
• Customer Premises
Application Example
I/O
I/O
Equipment
• 10/100/1000 Ethernet
1
2
V
CC
4
3
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/24/13
Page 2
TVS Diode Arrays (SPA
DC Bias (V)
Capacitance (pF)
0.00
0.50
1.00
1.50
2.00
2.50
0.00.5 1.01.5 2.02.5 3.03.5 4.04.5 5.0
I/O -GND
I/O
-I/O
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
110%
0.05.0 10.0 15.0 20.0 25.0 30.0
Time (μs)
Percent of I
PP
®
Diodes)
Lightning Surge Protection- SR70 Series
Absolute Maximum Ratings
Symbol Parameter Value Units
I
PP
T
OP
T
STOR
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress only rating and operation of the device
at these or any other conditions above those indicated in the operational sections of this
specification is not implied.
Electrical Characteristics (T
Reverse Standoff Voltage V
Reverse Leakage Current I
Clamp Voltage
Dynamic Resistance R
ESD Withstand Voltage
Diode Capacitance
Peak Current (tp=8/20μs) 40.0 A
Operating Temperature –40 to 125 °C
Storage Temperature –55 to 150 °C
=25ºC)
OP
Parameter Symbol Test Conditions Min Typ Max Units
RWM
LEAK
VR=70V 5 µA
IPP=1A, tp=8/20µs, Fwd 1. 4 V
1
1
1
V
C
I/O-GND
C
V
C
DYN
ESD
I/O-I/O
I
=10A, tp=8/20µs, Fwd 4.7 V
PP
I
=30A, tp=8/20µs, Fwd 12 V
PP
(VC2-VC1)/(I
IEC61000-4-2 (Contact) ±30 kV
IEC61000-4-2 (Air) ±30 kV
Reverse Bias=0V, f=1MHz 2.0 3.0 pF
Reverse Bias=0V, f=1MHz 1. 3 2.0 pF
Thermal Information
Parameter Rating Units
Storage Temperature Range –55 to 150 °C
Maximum Junction Temperature 150 °C
Maximum Lead Temperature
(Soldering 20-40s)
70 V
) 0.35 Ω
PP2-IPP1
260 °C
Note: 1. Parameter is guaranteed by design and/or device characterization.
Capacitance vs. Reverse Bias
Pulse Waveform
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 04/24/13
Page 3
TVS Diode Arrays (SPA
t
R
R
o
C
e
T
SR
70
02
C T
G
Series
T= Tape & Reel
702C
Peak Pulse Current-I
PP
(A)
Clamp Voltage (V
C
)
0
2
4
6
8
10
12
14
16
0510 15 20 25 30 35 40
®
Diodes)
Lightning Surge Protection- SR70 Series
Clamping Voltage vs. I
PP
Soldering Parameters
Reflow Condition Pb – Free assembly
- Temperature Min (T
Pre Heat
- Temperature Max (T
- Time (min to max) (ts) 60 – 180 secs
Average ramp up rate (Liquidus) Temp
(T
) to peak
L
to TL - Ramp-up Rate 3°C/second max
T
S(max)
Reflow
- Temperature (TL) (Liquidus) 217°C
- Temperature (tL) 60 – 150 seconds
Peak Temperature (TP) 260
Time within 5°C of actual peak
Temperature (t
)
p
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (T
Do not exceed 260°C
) 150°C
s(min)
) 200°C
s(max)
3°C/second max
+0/-5
°C
20 – 40 seconds
) 8 minutes Max.
P
Product Characteristics
Lead Plating Matte Tin
Lead Material Copper Alloy
Lead Coplanarity 0.0004 inches (0.102mm)
Substitute Material Silicon
Body Material Molded Epoxy
Flammability UL 94 V-0
Notes :
1. All dimensions are in millimeters
2. Dimensions include solder plating.
3. Dimensions are exclusive of mold flash & metal burr.
4. Blo is facing up for mold and facing down for trim/form, i.e. reverse trim/form.
5. Package surface matte finish VDI 11-13.
t
T
P
Ramp-up
t
amp-up
PreheatPrehea
S
T
L
T
S(max)
Temperature
T
S(min)
25
time to peak temperature
P
t
L
Critical Zone
ritical Zon
L to TP
to
T
Ramp-down
amp-d
Time
Ordering Information
Part Number Package Marking Min. Order Qty.
SR70-02CTG SOT143
702C
3000
Part Numbering System
–
Number of
Channels
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/24/13
Part Marking System
G= Green
Package
C: SOT143-4
Page 4
User Feeding Direction
Pin 1
Package Dimensions—SOT143
e
3.40 (.134")
3.60 (.140")
0.80 (.032")
1.00 (.040")
2.20
(.087")
REF
1.90
(.075")
1.70
(.067")
1.00 (.040")
1.20 (.048")
0.80 (.032")
1.00 (.040")
BSC
MAX
1.40 (.055")
4
3
Recommended Pad Layout
E
503B
1
e1
D
b2
c
E1
2
3.40 (.134")
3.60 (.140")
A
A1
b
L
L1
TVS Diode Arrays (SPA
Lightning Surge Protection- SR70 Series
Package SOT143
Pins 4
JEDEC TO-253
0.80 (.032")
1.00 (.040")
2.20
(.087")
REF
1.00 (.040")
1.20 (.048")
1.90
(.075")
1.70
(.067")
BSC
1.40 (.055")
0.80 (.032")
1.00 (.040")
MAX
A1 0.05 0.15 0.002 0.006
b2 0.76 0.89 0.030 0.035
E1 1.20 1.40 0.047 0.055
e1 0.20 BSC 0.008 BSC
L1 0.550 REF 0.022 REF
®
Diodes)
Millimeters Inches
Min Max Min Max
A 0.8 1.22 0.03 0.048
b 0.30 0.50 0.012 0.020
c 0.08 0.20 0.003 0.008
D 2.80 3.04 0.110 0.120
E 2.10 2.64 0.082 0.104
e 1.92 BSC 0.076 BSC
L 0.4 0.6 0.016 0.024
Embossed Carrier Tape & Reel Specification—SOT143
Notes :
1. All dimensions are in millimeters
Symbol Millimeters
A 3.19±0.10
B 2.8±0.10
C 1.31±0.10
d 1.50±0.10
E 1.75±0.10
F 3.50±0.10
P0 4.00±0.10
P 4.00±0.10
P1 2.00±0.10
W 8.00±0.10
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 04/24/13
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