Resettable PTCs
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9
RESETTABLE PTCs
Radial Leaded PTC
60R Series
Standard reel quantities:
ENVIRONMENTAL SPECIFICATIONS:
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 / –40°C, 20 times. ±10% typical
resistance change.
Vibration: MIL-STD 202, Method 201. No resistance change.
Mechanical Shock: MIL-STD-202, Method 213 test condition I
(100 g’s, 6 sec.). No resistance change.
Max. Surface Temperature: 125°C
Operating/Storage Temperature: –40°C to 85°C
• The 60R Series Resettable devices utilize a unique polymer-based,
Positive Temperature Coefficient (PTC) material to protect electrical
circuits against overcurrent conditions.
• In normal operation, the 60R Series PTC has many conductive paths
and a very low resistance. In an overcurrent condition, the temperature
of the polymer material rises. This dramatically reduces the conductive
paths resulting in an immediate rise in resistance. In this condition, the
device provides circuit protection by significantly limiting the flow of
current. However, once the cause of the initial overcurrent condition
is eliminated, the 60R Series PTC cools down and resets to a low
resistance value permitting the normal current flow to resume.
• The 60R Series is a 60V Radial Leaded Device with a 40A Short
Circuit Rating.
AGENCY APPROVALS: Recognized under the Components Program
of Underwriters Laboratory and the Component Acceptance Program of
CSA. TUV approved.
AGENCY FILE NUMBERS: UL E183209, CSA LR 108832
PHYSICAL SPECIFICATIONS:
Materials: Leads
60R010: Tin coated constantan, 24 AWG
(0.020" Dia.)
60R017-040: Tin plated copper-clad steel, 24 AWG (0.020"
Dia.)
60R050-090: Tin plated copper, 24 AWG (0.020" Dia.)
60R110-375: Tin plated copper, 20 AWG (0.032" Dia.)
Lead Solderability: MIL-STD-202, Method 208E
Coating: Thermoset Coating
Device Labeling: Device is marked with the letter ‘L’, amperage rating,
voltage rating & date code.
Packaging: Standard bulk packaging is 500 pieces per container.
Optional tape and reel packaging per EIA 468-B is also available.
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 85
0
50
100
150
200
Temperature (°C)
Percentage of Rated Current
Part Reel
Number Quantity
R60R010
R60R020
R60R025
R60R030 3000
R60R040
R60R050
R60R065
R60R075
R60R090
Part Reel
Number Quantity
R60R017 2500
R60R110
R60R135 1500
R60R160
R60R185 1000
60R250 Bulk Only
60R300 500 Per
60R375 Container
Rerating Curve for 60R Series
®
®
Resettable PTCs
358
www.littelfuse.com
Radial Leaded PTC
60R Series
Part Number ‘A’ (Max.) ‘B’ (Max.) ‘C’ (Typ.)
60R010 7.37 (0.29) 12.7 (0.50) 5.08 (0.20)
60R017 7.37 (0.29) 12.7 (0.50) 5.08 (0.20)
60R020 7.37 (0.29) 12.19 (0.48) 5.08 (0.20)
60R025 7.37 (0.29) 12.7 (0.50) 5.08 (0.20)
60R030 7.37 (0.29) 12.95 (0.51) 5.08 (0.20)
60R040 7.62 (0.30) 13.46 (0.53) 5.08 (0.20)
60R050 7.62 (0.30) 13.72 (0.54) 5.08 (0.20)
60R065 9.65 (0.38) 14.48 (0.57) 5.08 (0.20)
60R075 10.41 (0.41) 15.24 (0.60) 5.08 (0.20)
60R090 11.68 (0.46) 15.75 (0.62) 5.08 (0.20)
60R110 12.95 (0.51) 18.0 (0.71) 5.08 (0.20)
60R135 14.48 (0.57) 19.56 (0.77) 5.08 (0.20)
60R160 16.26 (0.64) 21.34 (0.84) 5.08 (0.20)
60R185 17.78 (0.70) 22.86 (0.90) 5.08 (0.20)
60R250 21.34 (0.84) 26.42 (1.04) 10.16 (0.40)
60R300 24.89 (0.98) 29.97 (1.18) 10.16 (0.40)
60R375 28.45 (1.12) 33.53 (1.32) 10.16 (0.40)
MARKING
A
C
B
D
E
Dimension ‘D’is 0.30" Minimum
Dimension ‘E’is 0.12" Maximum
Note: Stand-offs only used for 60R010-60R090
3.75A
3.00A
2.50A
1.85A
1.60A
1.35A
1.10A
.900A
.750A
.650A
.500A
.400A
.300A
.250A
.200A
.170A
.100A
5001001010.10.05
0.01
0.1
10
100
1000
1
TIME IN SECONDS
CURRENT IN AMPERES
Average Time Current Curves
Part Ihold Itrip Vmax Imax Pdmax. Current Time RIL RAT
Number (A) (A) (Vdc) (A) (W) (A) (Sec) (Ω)(Ω)
60R010 0.10 0.20 60 40 0.38 0.50 4.0 2.50 7.50
60R017 0.17 0.34 60 40 0.48 0.85 3.0 3.30 8.00
60R020 0.20 0.40 60 40 0.41 1.00 2.2 1.83 4.40
60R025 0.25 0.50 60 40 0.45 1.25 2.5 1.25 3.00
60R030 0.30 0.60 60 40 0.49 1.50 3.0 0.88 2.10
60R040 0.40 0.80 60 40 0.56 2.00 3.8 0.55 1.29
60R050 0.50 1.00 60 40 0.77 2.50 4.0 0.50 1.17
60R065 0.65 1.30 60 40 0.88 3.25 5.3 0.31 0.72
60R075 0.75 1.50 60 40 0.92 3.75 6.3 0.25 0.60
60R090 0.90 1.80 60 40 0.99 4.50 7.2 0.20 0.47
60R110 1.10 2.20 60 40 1.50 5.50 8.2 0.15 0.38
60R135 1.35 2.70 60 40 1.70 6.75 9.6 0.12 0.30
60R160 1.60 3.20 60 40 1.90 8.00 11.4 0.09 0.22
60R185 1.85 3.70 60 40 2.10 9.25 12.6 0.08 0.19
60R250 2.50 5.00 60 40 2.50 12.50 15.6 0.05 0.13
60R300 3.00 6.00 60 40 2.80 15.00 19.8 0.04 0.10
60R375 3.75 7.50 60 40 3.20 18.75 24.0 0.03 0.08
Resistance
Ihold = Hold Current: maximum current device will sustain for 4 hours without tripping in 20°C still air.
Itrip = Trip Current: minimum current at which the device will trip in 20°C still air.
Vmax = Maximum voltage device can withstand without damage at rated current (Imax)
Imax = 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.
RIL = Minimum resistance of device in initial (un-soldered) state.
RAT = Maximum resistance of device at 20°C measured one hour after tripping.
CAUTION: Operation beyond the specified ratings may result in damage and possible arcing and flame.
ORDERING INFORMATION:
Dimensions (Inches)
Maximum Time
To Trip
