Littelfuse VT User Manual
VT Series
POLYFUSE® Resettable PTCs
POLYFUSE® Resettable PTCs
Axial Lead Battery Strap Type > VT Series
Description
The new VT 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
• Compact design saves
lead–free
• Weldable Nickel terminals
• Low resistance
• Slim, low profile design
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
Applications
• Rechargeable battery cell
protection
R50119583
- Mobile phones
- Laptop computers
Electrical Characteristics
Maximum Time
d
Current
(A)
To Trip
Time
(Sec.)
Part Number
I
hold
(A)
I
(A)
V
trip
(Vdc)
max
I
(A)
max
P
max.
(W)
16VT170 1.70 3.40 16 100 1.4 8.50 3.00 0.030 0.052 0.105
16VT170XS 1.70 3.40 16 100 1.4 8.50 3.00 0.030 0.052 0.105
16VT175 1.75 3.80 16 100 1.4 9.00 3.00 0.025 0.045 0.090
16VT175S 1.75 3.80 16 100 1.4 9.00 3.00 0.025 0.045 0.090
16VT175L 1.75 3.80 16 100 1.4 9.00 3.00 0.025 0.045 0.090
16VT175XL 1.75 3.80 16 100 1.4 8.75 5.00 0.029 0.051 0.102
16VT175EL 1.75 3.60 16 100 1.4 8.75 5.00 0.029 0.051 0.102
16VT175NEL 1.75 3.60 16 100 1.4 8.75 5.00 0.029 0.051 0.102
16VT200 2.00 4.50 16 100 1.5 10.00 4.00 0.021 0.039 0.080
16VT200S 2.00 4.50 16 100 1.5 10.00 4.00 0.021 0.039 0.080
16VT200UL 2.00 4.70 16 100 1.5 10.00 5.00 0.022 0.039 0.076
16VT210 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.030 0.060
16VT210S 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.030 0.060
16VT210SS 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.030 0.060
16VT210L 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.030 0.060
16VT210NL 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.035 0.065
16VT210UL 2.10 4.70 16 100 1.5 10.00 5.00 0.018 0.035 0.065
16VT240 2.40 5.40 16 100 1.5 12.00 4.00 0.015 0.026 0.052
I
= Hold current: maximum current device will pass without tripping in 20°C still air.
hold
= Trip current: minimum current at which the device will trip in 20°C still air.
I
trip
= Maximum voltage device can withstand without damage at rated current (I max)
V
max
= Maximum fault current device can withstand without damage at rated voltage (V
I
max
= Power dissipated from device when in the tripped state at 20°C still air.
P
d
= Minimum resistance of device in initial (un-soldered) state.
R
min
© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/VT.html for current information.
)
max
Revised: June 4, 2010
= Typical resistance of device in initial (un-soldered) state.
R
typ
= Maximum resistance of device at 20°C measured one hour after tripping or reflow
R
1max
soldering of 260°C for 20 sec.
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
129
R
(Ω)
min
Resistance
R
typ
(Ω)
board space
R
1max
(Ω)
Agency
Approvals
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
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XX
VT Series
VT Series
POLYFUSE® Resettable PTCs
Axial Lead Battery Strap Type > VT Series
Temperature Rerating
Ambient Operation Temperature
-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C
Part Number Hold Current (A)
16VT170 3.20 2.70 2.20 1.70 1.30 1.00 0.80 0.50 0.10
16VT170XS 3.20 2.70 2.20 1.70 1.30 1.00 0.80 0.50 0.10
16VT175 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT175S 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT175L 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT175XL 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT175EL 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT175NEL 3.20 2.70 2.20 1.75 1.30 1.00 0.80 0.50 0.10
16VT200 3.70 3.20 2.60 2.00 1.50 1.20 0.90 0.50 0.10
16VT200S 3.70 3.20 2.60 2.00 1.50 1.20 0.90 0.50 0.10
16VT200UL 3.70 3.20 2.60 2.00 1.50 1.20 0.90 0.50 0.10
16VT210 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT210S 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT210SS 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT210L 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT210NL 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT210UL 4.10 3.50 2.90 2.10 1.60 1.30 1.00 0.70 0.10
16VT240 4.40 3.70 3.10 2.40 1.80 1.50 1.20 0.90 0.10
Average Time Current Curves
1.70 A
1.75 A
2.00 A
2.10 A
2.40 A
10
1
Time in Seconds
0.1
0.01
1 10 100 1000
Current in Amperes
VT
Temperature Rerating Curve
200%
170%
150%
130%
110%
90%
70%
50%
Percentage of Rated Current
30%
10%
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Temperature (°C)
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
VT Series
Revised: June 4, 2010
130
© 2010 Littelfuse, Inc.
Please refer to www.littelfuse.com/series/VT.html for current information.
Specifications are subject to change without notice.
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