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66
Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
60R Series
• The 60R series radial leaded device is designed to
provide overcurrent protection for (≤60V) applications
where space is not a concern and resettable protection
is preferred.
Electrical Characteristics
Part Number I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
P d
max.
(W)
Maximum Time
To Trip Resistance Agency
Approvals
Current
(A)
Time
(Sec.)
R min
(Ω)
R 1max
(Ω)
60R010 0.10 0.20 60 40 0.38 0.50 4.00 2.500 7.500 X X
60R020 0.20 0.40 60 40 0.41 1.00 2.20 1.830 4.400 X X
60R025 0.25 0.50 60 40 0.45 1.25 2.50 1.250 3.000 X X
60R030 0.30 0.60 60 40 0.49 1.50 3.00 0.880 2.100 X X
60R040 0.40 0.80 60 40 0.56 2.00 3.80 0.550 1.290 X X
60R050 0.50 1.00 60 40 0.77 2.50 4.00 0.500 1.170 X X
60R065 0.65 1.30 60 40 0.88 3.25 5.30 0.310 0.720 X X
60R075 0.75 1.50 60 40 0.92 3.75 6.30 0.250 0.600 X X
60R090 0.90 1.80 60 40 0.99 4.50 7.20 0.200 0.470 X X
60R110 1.10 2.20 60 40 1.50 5.50 8.20 0.150 0.380 X X
60R135 1.35 2.70 60 40 1.70 6.75 9.60 0.120 0.300 X X
60R160 1.60 3.20 60 40 1.90 8.00 11.40 0.090 0.220 X X
60R185 1.85 3.70 60 40 2.10 9.25 12.60 0.080 0.190 X X
60R250 2.50 5.00 60 40 2.50 12.50 15.60 0.050 0.130 X X
60R300 3.00 6.00 60 40 2.80 15.00 19.80 0.040 0.100 X X
60R375 3.75 7.50 60 40 3.20 18.75 24.00 0.030 0.080 X X
Description
Features
Applications
• RoHS compliant and
lead-free
• Fast time-to-trip
• Cured, flame retardant
epoxy polymer insulating
material meets UL 94V-0
requirements
• USB hubs, ports
and peripherals
• IEEE1394 ports
• Computers & peripherals
• Motor protection
• General electronics
• Automotive applications
• Industrial controls
• Transformers
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 (Vmax)
Pd = 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 typ = Typical resistance of device in initial (un-soldered) state.
R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
Caution: Operation beyond the specified rating may result in damage and possible arcing
and flame.
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50082521
60R Series
Specifications are subject to change without notice.
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Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
10%
30%
50%
70%
90%
110%
130%
150%
170%
Temperature (°C)
Percentage of Rated Current
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)
60R010 0.16 0.14 0.12 0.10 0.08 0.07 0.06 0.05 0.04
60R020 0.31 0.27 0.24 0.20 0.16 0.14 0.13 0.11 0.08
60R025 0.39 0.34 0.30 0.25 0.20 0.18 0.16 0.14 0.10
60R030 0.47 0.41 0.36 0.30 0.24 0.22 0.19 0.16 0.12
60R040 0.62 0.54 0.48 0.40 0.32 0.29 0.25 0.22 0.16
60R050 0.78 0.68 0.60 0.50 0.41 0.36 0.32 0.27 0.20
60R065 1.01 0.88 0.77 0.65 0.53 0.47 0.41 0.35 0.26
60R075 1.16 1.02 0.89 0.75 0.61 0.54 0.47 0.41 0.30
60R090 1.40 1.22 1.07 0.90 0.73 0.65 0.57 0.49 0.36
60R110 1.71 1.50 1.31 1.10 0.89 0.79 0.69 0.59 0.44
60R135 2.09 1.84 1.61 1.35 1.09 0.97 0.85 0.73 0.54
60R160 2.48 2.18 1.90 1.60 1.30 1.15 1.01 0.86 0.64
60R185 2.87 2.52 2.20 1.85 1.50 1.33 1.17 1.00 0.74
60R250 3.88 3.40 2.98 2.50 2.03 1.80 1.58 1.35 1.00
60R300 4.65 4.08 3.57 3.00 2.43 2.16 1.89 1.62 1.20
60R375 5.81 5.10 4.46 3.75 3.04 2.70 2.36 2.03 1.50
Temperature Rerating
Temperature Rerating CurveAverage Time Current Curves
CURRENT IN AMPERES
TIME IN SECONDS
0.001
0.010
0.100
1
10
100
1000
10000
100000
1 10 100 10000.20
0.200A
0.250A
0.300A
0.400A
0.500A
0.650A
0.750A
0.900A
1.10A
1.35A
1.60A
1.85A
2.50A
3.00A
3.75A
60R Series
Specifications are subject to change without notice.
Note: 1.00 means the number one with two decimal places. AKL V3.9 06.05.16
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.
60R Series
Specifications are subject to change without notice.
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Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
Environmental Specifications
Operating/Storage
Temperature -40°C to +85°C
Maximum Device Surface
Temperature in Tripped State 125°C
Passive Aging +85°C, 1000 hours
±5% typical resistance change
Humidity Aging +85°C, 85%R.H. 1000 hours
±5% typical resistance change
Thermal Shock +85°C to -40°C 10 times
±5% typical resistance change
Solvent Resistance MIL-STD-202, Method 215F
Physical Specifications
Lead Material .20-.40A: Tin-plated copper clad steel
.50-3.75A: Tin-plated copper
Soldering
Characteristics
Solderability per MIL-STD-202,
Method 208E
Insulating Material Cured, flame retardant epoxy polymer
meets UL94V-0 requirements.
Device Labeling Marked with LF, voltage, current rating,
and date code.
Soldering Parameters - Wave Soldering
Pre-Heating Zone
Refer to the condition
recommended by the
flux manufacturer.
Max. ramping rate
should not exceed
4°C/Sec.
Soldering Zone
Max. solder temperature
should not exceed
260°C
Cooling Zone Cooling by natural
convection in air.
Preheating
160
190
220
260
05 max.
Temperature ( °C)
Soldering Cooling
60 min.
Time(s)
60R Series
Specifications are subject to change without notice.
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Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
Dimensions
A
C
B
D
E
MARKING
60
050X
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark 60
025X
Voltage Rating
Current Rating
Littelfuse
Trademark
60
XXXX
Voltage Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark
Single Sided Marking
0.50A to 3.75A
Double Sided Marking
0.20A to 0.40A
Top Side
Bottom Side
Part Number
A B C D E Physical Characteristics
Inches mm Inches mm Inches mm Inches mm Inches mm Lead (dia)
Material
Max. Max. Max. Max. Typ. Typ. Min. Min. Max. Max. Inches mm
60R010 0.29 7.4 0.50 12.7 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/CuFe
60R020 0.29 7.4 0.46 11.7 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/CuFe
60R025 0.29 7.4 0.50 12.7 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/CuFe
60R030 0.29 7.4 0.50 12.7 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/CuFe
60R040 0.30 7.6 0.53 13.5 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/CuFe
60R050 0.31 7.9 0.54 13.7 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/Cu
60R065 0.37 9.4 0.57 14.5 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/Cu
60R075 0.40 10.2 0.59 15 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/Cu
60R090 0.44 11.2 0.62 15.8 0.20 5.1 0.30 7.6 0.12 3.1 0.02 0.51 Sn/Cu
60R110 0.51 13 0.72 18.2 0.20 5.1 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R135 0.53 13.58 0.78 19.8 0.20 5.1 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R160 0.60 15.36 0.85 21.6 0.20 5.1 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R185 0.66 16.76 0.91 23 0.20 5.1 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R250 0.78 19.93 1.03 26.2 0.40 10.2 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R300 0.91 23.11 1.15 29.3 0.40 10.2 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
60R375 1.04 26.3 1.22 31.1 0.40 10.2 0.30 7.6 0.12 3.1 0.03 0.81 Sn/Cu
A
C
B
D
E
MARKING
60
050X
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark 60
025X
Voltage Rating
Current Rating
Littelfuse
Trademark
60
XXXX
Voltage Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark
Single Sided Marking
0.50A to 3.75A
Double Sided Marking
0.20A to 0.40A
Top Side
Bottom Side
Part Marking System
A
C
B
D
E
MARKING
60
050X
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark 60
025X
Voltage Rating
Current Rating
Littelfuse
Trademark
60
XXXX
Voltage Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark
Single Sided Marking
0.50A to 3.75A
Double Sided Marking
0.20A to 0.40A
Top Side
Bottom Side
A
C
B
D
E
MARKING
60
050X
XXXX
Voltage Rating
Current Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark 60
025X
Voltage Rating
Current Rating
Littelfuse
Trademark
60
XXXX
Voltage Rating
Date Code
(Contact Littelfuse
for additional
information)
Littelfuse
Trademark
Single Sided Marking
0.50A to 3.75A
Double Sided Marking
0.20A to 0.40A
Top Side
Bottom Side
60R Series
Specifications are subject to change without notice.
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©2006 Littelfuse
70
Electronics Designers Guide
POLYFUSE® Resettable PTCs
Radial Leaded
Part Numbering System
Packaging
PACKAGING STYLE
I
HOLD
CURRENT CODE (SEE TABLE BELOW)
QUANTITY CODE: F=200 H=100 M=1000 P=2000 U=500
BLANK: Bulk
R: Tape & Ammo
60 R 250 X M R
TYPE: X (60VDC)
R: RADIAL
SERIES
VOLTAGE RATING (VDC)
I hold
(A) I hold Code Packaging
Option Quantity Quantity &
Packaging Codes
0.10 010 Bulk 500 U
Tape and Ammo 2000 PR
0.20 020 Bulk 500 U
Tape and Ammo 2000 PR
0.30 030 Bulk 500 U
Tape and Ammo 2000 PR
0.40 040 Bulk 500 U
Tape and Ammo 2000 PR
0.50 050 Bulk 500 U
Tape and Ammo 2000 PR
0.65 065 Bulk 500 U
Tape and Ammo 2000 PR
0.75 075 Bulk 500 U
Tape and Ammo 2000 PR
0.90 090 Bulk 500 U
Tape and Ammo 2000 PR
1.10 110 Bulk 500 U
Tape and Ammo 1000 MR
1.35 135 Bulk 200 F
Tape and Ammo 1000 MR
1.60 160 Bulk 200 F
Tape and Ammo 1000 MR
1.85 185 Bulk 200 F
Tape and Ammo 1000 MR
2.50 250 Bulk 200 F
Tape and Ammo 1000 MR
3.00 300 Bulk 200 F
3.75 375 Bulk 100 H
60R Series
Specifications are subject to change without notice.
