POLYFUSE
廬
Resettable PTCs
Axial Leaded Strap
ST Series
Description
The new ST series device provides reliable, noncycling
protection against overcharging and short circuits events
for rechargeable battery cells where resettable protection
is desired.
Features
鈥?RoHS compliant and
lead-free
鈥?Weldable nickel terminals
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50082521
鈥?Low resistance
鈥?Provides overcurrent
protection at 125擄C trip
temperature
Applications
鈥?Rechargeable battery cell
protection
Electrical Characteristics
I
hold
(A)
1.2
1.2
1.75
1.75
I
trip
(A)
2.7
2.7
3.8
3.8
V
max
(Vdc)
15
15
15
15
I
max
(A)
100
100
100
100
P
d
max.
(W)
1.2
1.2
2.5
2.5
Maximum Time
To Trip
Current
(A)
6.00
6.00
8.75
8.75
Time
(Sec.)
5.00
5.00
5.00
5.00
R
min
(惟)
0.085
0.085
0.050
0.050
Resistance
R
typ
(惟)
0.160
0.160
0.090
0.090
R
1max
(惟)
0.220
0.220
0.120
0.120
X
X
X
X
X
X
X
X
Agency
Approvals
Part Number
15ST120
15ST120S
15ST175
15ST175S
I
hold
= Hold current: maximum current device will pass without tripping in 20擄C still air.
I
trip
= Trip current: minimum current at which the device will trip in 20擄C still air.
V
max
= Maximum voltage device can withstand without damage at rated current (I max)
I
max
= Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
d
= Power dissipated from device when in the tripped state at 20擄C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
typ
= Typical resistance of device in initial (un-soldered) state.
R
1max
= Maximum resistance of device at 20擄C measured one hour after tripping or reflow
soldering of 260擄C for 20 sec.
Caution:
Operation beyond the specified rating may result in damage and possible arcing
and flame.
ST Series
Specifications are subject to change without notice.
Electronics Designers Guide
www.littelfuse.com
漏2006 Littelfuse
LITTELFUSE
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