Littelfuse 16R Series Radial Leaded PTCs are designed to
provide resettable overcurrent protection serving a wide
range of electronics applications. With maximum 16 volts
and maximum 100-ampere short circuit rating, they offer an
ideal solution for USB protection.
Features
• 100A short circuit rating
• 16V Operating voltages
• Fast time–to–trip
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119318
• Meets all USB protection
requirements
• RoHS compliant, Lead-
Free and Halogen-Free*
Applications
• Computers & peripherals
• Any USB application
• General Electronics
Additional Information
Datasheet
Resources
Samples
Electrical Characteristics
I
trip
(A)
4.7
5.1
6.8
8.5
10.2
11.9
13.6
15.3
17
.0
18.7
20.4
23.8
V
max
(Vdc)
16
16
16
16
16
16
16
16
16
16
16
16
I
max
(A)
100
100
100
100
100
100
100
100
100
100
100
100
P
d
typ.
(W)
1.0
2.3
2.4
2.6
2.8
3.0
3.0
3.3
3.6
3.7
4.2
4.6
Maximum Time
To Trip
Current
(A)
12.5
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
70.0
Time
(Sec.)
5.0
1.0
1.7
2.0
3.3
3.5
5.0
5.5
6.0
7
.0
7
.5
9.0
Resistance
R
min
(Ω)
0.0220
0.0380
0.0210
0.0150
0.0100
0.0077
0.0056
0.0047
0.0040
0.0037
0.0033
0.0026
R
1max
(Ω)
0.0530
0.0975
0.0600
0.0340
0.0280
0.0200
0.0175
0.0135
0.0102
0.0089
0.0086
0.0064
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Part Number
I
hold
(A)
2.5
3.0
4.0
5.0
6.0
7
.0
8.0
9.0
10.0
11.0
12.0
14.0
Agency
Approvals
16R250G
16R300G
16R400G
16R500G
16R600G
16R700G
16R800G
16R900G
16R1000G
16R1100G
16R1200G
16R1400G
I
hold
= Hold current: maximum current device will pass without tripping in 20°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 20°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°C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
1max
= Maximum resistance of device at 20°C measured one hour after tripping.
Caution:
Operation beyond the specified rating may result in damage and possible arcing
and flame.
* Effective January 1, 2010, all 16R PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 16R PTC products may continue to be sold, until supplies are depleted.
Specifications are subject to change without notice.
Revised: 03/22/17
POLY-FUSE
®
Resettable PTCs
Radial Leaded > 16R Series
Dimensions
A
E
A
E
Part Marking System
Single Sided Marking
B
Littelfuse
Trademark
250G
XXXX
16
B
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
D
D
C
F
C
F
Figure 1
Part
Number
Figu
re
A
Inches
Max.
mm
Max.
Inches
Max.
B
Figure 2
C
mm
Max.
Inches
Typ.
mm
Typ.
D
Inches
Min.
mm
Min.
Inches
Max.
E
mm
Max.
Inches
Typ.
F
mm
Typ.
Physical Characteristics
Lead (dia)
Inches
mm
Material
16R250G
16R300G
16R400G
16R500G
16R600G
16R700G
16R700G
KL
16R800G
16R900G
16R1000G
16R1100G
16R1200G
16R1400G
2
1
1
1
1
1
2
1
1
1
1
1
1
0.35
0.28
0.35
0.41
0.42
0.44
0.44
0.50
0.55
0.65
0.69
0.69
0.93
8.90
7
.10
8.90
10.40
10.70
11.20
11.20
12.70
14.00
16.50
17
.50
17
.50
23.50
0.50
0.43
0.50
0.56
0.67
0.78
0.93
0.82
0.85
0.99
1.02
1.10
1.10
12.80
11.00
12.80
14.30
17
.10
19.70
23.70
20.90
21.70
25.20
26.00
28.00
27
.90
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.40
0.40
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
5.1
10.2
10.2
0.13
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
0.30
3.18
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
7
.6
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.14
0.14
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.00
3.50
3.50
0.035
0.047
0.047
0.047
0.047
0.047
0.047
0.047
0.047
0.047
0.047
0.055
0.055
0.9
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.4
1.4
0.020
0.032
0.032
0.032
0.032
0.032
0.032
0.032
0.032
0.032
0.032
0.039
0.039
0.51
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
0.81
1.00
1.00
Sn/
CuFe
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
Sn/Cu
WARNING
• Users shall independently assess the suitability of these devices for each of their applications
• Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire
• These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such
conditions are expected to be repetitive or prolonged in duration
• Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices
• These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses
• Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device.
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