15ST120 Datasheet, PDF (1/3 Pages) Littelfuse – POLYFUSE® Resettable PTCs

POLYFUSE^® Resettable PTCs
Axial Leaded Strap
ST Series
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50082521
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
• RoHS compliant and
lead-free
• Weldable nickel terminals
• Low resistance
• Provides overcurrent
protection at 125°C trip
temperature
Applications
• R echargeable battery cell
protection
Electrical Characteristics
Part Number
15ST120
15ST120S
15ST175
15ST175S
I _hold
(A)
1.2
1.2
1.75
1.75
Maximum Time
I _trip
(A)
V _max
(Vdc)
I _max
(A)
P_d
max.
(W)
To Trip
Current Time
(A)
(Sec.)
Resistance
R _min
(Ω)
R _typ
(Ω)
R _1max
(Ω)
2.7
15
100
1.2
6.00
5.00
0.085 0.160 0.220
2.7
15
100
1.2
6.00
5.00
0.085 0.160 0.220
3.8
15
100
2.5
8.75
5.00
0.050 0.090 0.120
3.8
15
100
2.5
8.75
5.00
0.050 0.090 0.120
Agency
Approvals
X
X
X
X
X
X
X
X
I = Hold current: maximum current device will pass without tripping in 20°C still air.
hold
I = Trip current: minimum current at which the device will trip in 20°C still air.
trip
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°C still air.
R _min = Minimum resistance of device in initial (un-soldered) state.
R = Typical resistance of device in initial (un-soldered) state.
typ
R = Maximum resistance of device at 20°C measured one hour after tripping or reflow
1max
soldering of 260°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.

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