Littelfuse Fixed Voltage Q2L Series 3.3x3.3 QFN - Manual (Page 2)

SIDACtor ® Protection Thyristors
98
Revised: February 22, 2011
© 2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
SLIC Protection
Series
I
pp
I
TSM
di/dt
2x10μs 1.2x50μs/8x20μs 10x160μs 10x560μs 10x1000μs 50 / 60Hz
A min A min A min A min A min A min Amps/μs max
C 500 400 200 150 100 30 500
Surge Ratings
Package Symbol Parameter Value Unit
3.3x3.3 QFN
T
J
Operating Junction Temperature Range 
UP
 °C
T
S
Storage Temperature Range 
UP
 °C
R
0JA
Thermal Resistance: Junction to Ambient 120 °C/W
Thermal Considerations
50
100
0
t
r
t
d
0
Peak
Value
Half Value
t – Time (μs)
I PP
– P
eak Pulse Current – %I
PP
t
r
= rise time to peak value
t
d
= decay time to half value
Waveform = t
r x t d
V-I Characteristics t
r
x t
d
Pulse Waveform
-8
-40 -20 0 20 40 60 80 100 120 140 160
-6
-4
0
2
4
6
8
10
12
14
Junction Temperature (T
J
) – °C
P
ercent of
V
S
Change – % 25 °C
25°C
Case Temperature (T
C
) - ºC
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
-40 -20 0 20 40 60 80 100 120 140 160
R
atio of
I H
I H
(T
C
= 2
5
ºC)
Normalized V
S
Change vs. Junction Temperature Normalized DC Holding Current vs. Case Temperature
Notes:
- Peak pulse current rating (I
PP
) is repetitive and guaranteed for the life of the product.
- I
PP

SBUJOHT
BQQMJDBCMF
PWFS
UFNQFSBUVSF
SBOHF
PG
$
UP
$
- The device must initially be in thermal equilibrium with -40°C < T
J
<
¡$
I
H
I
DRM
V
DRM
V
T
+V
+I
V
S
I
S
I
T
V
F
-V
-I