Littelfuse SRDA3.3 Series - Manual (Page 3)

3 ©2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Please refer to
www.littelfuse.com for current information.
TVS Diode Arrays (SPA ® Diodes)
Revision: June 14, 2013
Lightning Surge Protection- SRDA3.3 Series
SRD
A3.3
SRDA3.3 Series
Cl
am
p V
ol
tag
e
V C
(V
)
20
1
0
2
4
6
8
10
12
14
16
18
10 20 30 35
I
PP
Peak Pulse Current- (A)
5 15 25
Clamping Voltage vs. I
PP
Pulse Waveform
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
110%
0.0 5.0 10.0 15.0 20.0 25.0 30.0
Time (μs)
Percent of
I PP
Time
T
e
mperature
T
P
T L
T S(max)
T
S(min)
25
t P
t L
t
S
time to peak temperature
Preheat Preheat
Ramp-up Ramp-up
Ramp-down Ramp-do
Critical Zone
T
L to T P
Critical Zone
T
L to T P
Refl ow Condition Pb – Free assembly
Pre Heat
- Temperature Min (T
s(min)
) 150°C
- Temperature Max (T
s(max)
) 200°C
- Time (min to max) (t
s
) 60 – 180 secs
Average ramp up rate (Liquidus) Temp
(T
L
) to peak
3°C/second max
T
S(max)
to T
L
- Ramp-up Rate 3°C/second max
Refl ow
- Temperature (T
L
) (Liquidus) 217°C
- Temperature (t
L
) 60 – 150 seconds
Peak Temperature (T
P
) 260 +0/-5 °C
Time within 5°C of actual peak
Temperature (t
p
)
20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (T
P
) 8 minutes Max.
Do not exceed 260°C
Soldering Parameters
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 fl ash & metal burr.
4. Blo is facing up for mold and facing down for trim/form, i.e. reverse trim/form.
5. Package surface matte fi nish VDI 11-13.
Power Derating Curve
0
10
20
30
40
50
60
70
80
90
100
110
0 25 50 75 100 125 150
Ambient Temperature-TA ( o C)
% o
f R
ated
Po
wer
o
r I
PP