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
XX
XX
XX
XX
XX
XX
XX
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.
POLYFUSE® Resettable PTCs
POLYFUSE® Resettable PTCs
Axial Lead Battery Strap Type > VT Series
Physical Specifications
Terminal Material
Insulating Material Polyester tape
0.13mm nominal thickness, quarter-hard
Nickel
Part Marking System
Double Sided Marking
Top Side
VT
Littelfuse
Trademark
Bottom Side
210
VT
210
XXEF
Dimensions
Figure 1
A
E
B
D1
B
D1 D2
B
D2
D1 D2
C
Figure 5
Environmental Specifications
Operating/Storage
Temperature
Passive Aging
Humidity Aging
Product Series
Current Rating
(Items with S at end of part number) (Items with SS at end of part number)
SLIT
(.02”x .15”)
A
Figure 2
0.5 x 4.0
Lot Number
(Contact Littelfuse for
additional information)
NOMINAL
A
B
E
C
Thermal Shock
Vibration
Figure 3
0.5 x 4.0
(.02”x .15”)
A
B
NOMINAL
SLIT
D1 D2
E
C
-40°C to +85°C
+70°C, 1000 hours,
-/+10% typical resistance change
+85°C, 85%R.H., 7 days,
-/+5% typical resistance change
MIL–STD–202F, Method 107G,
+85°C/-40°C 20 times
-30% typical resistance change
MIL–STD–883C, Method 2007.1,
Condition A, No change
Figure 4
A
E
B
C
D1 D2
D1
Figure 6
A
E
D2
C
E
C
ABCD1D2E
Part Number Figure
16VT170 1
16VT170XS 2
16VT175 1
16VT175S 2
16VT175L 1
16VT175XL 4
16VT175EL 6
16VT175NEL 6
16VT200 1
16VT200S 2
16VT200UL 4
16VT210 1
16VT210S 2
16VT210SS 3
16VT210L 1
16VT210NL 5
16VT210UL 5
16VT240 1
© 2010 Littelfuse, Inc
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/VT.html for current information.
Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max Min Max Min Max Min Max Min Max Min Max
0.61 0.69 15.40 17.50 0.28 0.29 7.00 7.40 0.02 0.03 0.50 0.80 0.16 0.24 4.0 6.2 0.16 0.24 4.0 6.2 0.15 0.16 3.90 4.10
0.82 0.90 20.90 22.90 0.19 0.21 4.90 5.30 0.02 0.03 0.50 0.80 0.16 0.34 4.0 8.6 0.16 0.34 4.0 8.6 0.15 0.16 3.90 4.10
0.82 0.87 20.90 22.20 0.14 0.15 3.50 3.80 0.02 0.03 0.50 0.80 0.16 0.20 4.0 5.0 0.16 0.20 4.0 5.0 0.11 0.12 2.90 3.10
0.82 0.87 20.90 22.20 0.14 0.15 3.50 3.80 0.02 0.03 0.50 0.80 0.16 0.20 4.0 5.0 0.16 0.20 4.0 5.0 0.11 0.12 2.90 3.10
1.02 1.10 26.00 28.00 0.14 0.15 3.50 3.80 0.02 0.03 0.50 0.80 0.24 – 6.0 – 0.24 – 6.0 – 0.11 0.12 2.90 3.10
1.00 1.11 25.50 28.20 0.14 0.15 3.50 3.90 0.02 0.03 0.50 0.80 0.34 0.41 8.7 10.3 0.22 0.29 5.7 7.3 0.09 0.10 2.40 2.60
1.53 1.62 38.80 41.20 0.14 0.15 3.50 3.90 0.02 0.03 0.60 0.80 0.74 0.80 18.7 20.3 0.34 0.41 8.7 10.3 0.09 0.10 2.40 2.60
1.53 1.62 38.80 41.20 0.11 0.13 2.90 3.30 0.02 0.03 0.60 0.80 0.79 0.87 20.0 22.0 0.20 0.27 5.2 6.8 0.09 0.10 2.40 2.60
0.82 0.91 20.90 23.10 0.15 0.17 3.80 4.30 0.02 0.03 0.60 0.70 0.16 0.20 4.0 5.0 0.16 0.20 4.0 5.0 0.11 0.12 2.90 3.10
0.82 0.91 20.90 23.10 0.15 0.17 3.80 4.30 0.02 0.03 0.60 0.70 0.16 0.20 4.0 5.0 0.16 0.20 4.0 5.0 0.11 0.12 2.90 3.10
1.42 1.54 36.00 39.00 0.16 0.17 4.10 4.30 0.02 0.03 0.50 0.80 0.15 0.21 3.9 5.3 0.78 0.85 19.7 21.5 0.11 0.12 2.90 3.10
0.82 0.91 20.90 23.10 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 0.16 0.23 4.1 5.8 0.16 0.23 4.1 5.8 0.15 0.16 3.90 4.10
0.82 0.91 20.90 23.10 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 0.16 0.23 4.1 5.8 0.16 0.23 4.1 5.8 0.15 0.16 3.90 4.10
0.82 0.91 20.90 23.10 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 0.16 0.23 4.1 5.8 0.16 0.23 4.1 5.8 0.15 0.16 3.90 4.10
0.94 1.02 24.00 26.00 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 0.20 0.28 5.0 7.1 0.20 0.28 5.0 7.1 0.15 0.16 3.90 4.10
2.78 2.81 70.50 71.50 0.15 0.17 3.80 4.30 0.02 0.03 0.60 0.80 0.98 – 25.0 – 0.98 – 25.0 – 0.11 0.12 2.90 3.10
2.78 2.81 70.50 71.50 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 1.12 – 28.5 – 1.12 – 28.5 – 0.15 0.16 3.90 4.10
0.95 1.03 24.20 26.20 0.19 0.21 4.90 5.30 0.02 0.03 0.60 0.80 0.20 0.22 5.0 5.7 0.20 0.22 5.0 5.7 0.15 0.16 3.90 4.10
131
Revised: June 4, 2010
VT Series
VT Series
Part Ordering Number System
16 VT 175 NEL U
QUANTITY CODE
U: 500 (bulk)
LEAD OPTIONS:
HOLD CURRENT (VALUE DIVIDED BY 100 = HOLD CURRENT IN AMPS)
SERIES
Voltage Rating (VDC)
Packaging
POLYFUSE® Resettable PTCs
Axial Lead Battery Strap Type > VT Series
Blank = standard
EL = extra long lead
L = long lead
NEL = narrow extra long lead
NL = narrow long lead
S = slit lead
SS = both leads slit
UL = ultra long lead
XL = extended long lead
XS = extended long lead slit
Part Number
16VT170 16VT170U
16VT170XS 16VT170XSU
16VT175 16VT175U
16VT175S 16VT175SU
16VT175L 16VT175LU
16VT175XL 16VT175XLU
16VT175EL 16VT175ELU
16VT175NEL 16VT175NELU
16VT200 16VT200U
16VT200S 16VT200SU
16VT200UL 16VT200ULU
16VT210 16VT210U
16VT210S 16VT210SU
16VT210SS 16VT210SSU
16VT210L 16VT210LU
16VT210NL 16VT210NLU
16VT210UL 16VT210ULU
16VT240 16VT240U
Ordering
Number
I
hold
(A)
I
hold
Code
Packaging
Option
Quantity
Quantity &
Packaging Codes
1.70 170 Bulk 500 U
1.70 170 Bulk 500 U
1.75 175 Bulk 500 U
1.75 175 Bulk 500 U
1.75 175 Bulk 500 U
1.75 175 Bulk 500 U
1.75 175 Bulk 500 U
1.75 175 Bulk 500 U
2.00 200 Bulk 500 U
2.00 200 Bulk 500 U
2.00 200 Bulk 500 U
2.10 210 Bulk 500 U
2.10 210 Bulk 500 U
2.10 210 Bulk 500 U
2.10 210 Bulk 500 U
2.10 210 Bulk 500 U
2.10 210 Bulk 500 U
2.40 240 Bulk 500 U
VT Series
132
Revised: June 4, 2010
© 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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