®
POLY-FUSE Resettable PTCs
Radial Leaded > 72R Series
*
RoHS
72R Series
Description
The 72R Series is designed to provide overcurrent
protection to 72Vdc maximum voltage with a maximum
40A short circuit rating.
Features
• 72Vdc max voltage w/max • Resettable feature
40A short circuit rating
• Ideal for a broad range of
• RoHS compliant, Lead-Free general electronics using a
and Halogen Free*
low voltage power supply
Agency Approvals
Applications
AGENCY
AGENCY FILE NUMBER
E183209
• Load protection on wide
range of low voltage power
supplies
• Computer peripherals
• General electronics
• Computers
R50119318
Electrical Characteristics
MaximumTime
Agency
Resistance
Pd
typ.
(W)
ToTrip
Approvals
I hold
Part Number
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
R min
R 1max
Current
(A)
1.00
Time
(Sec.)
(Ω)
(Ω)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
72R020X
72R025X
72R030X
72R040X
72R050X
72R065X
72R075X
72R090X
72R110X
72R135X
72R160X
72R185X
72R250X
72R300X
72R375X
0.20
0.25
0.30
0.40
0.50
0.65
0.75
0.90
1.10
0.40
0.50
0.60
0.80
1.00
1.30
1.50
1.80
2.20
2.70
3.20
3.70
5.00
6.00
7.50
72
72
72
72
72
72
72
72
72
72
72
72
72
72
72
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
0.41
0.45
0.49
0.56
0.77
0.88
0.92
0.99
1.50
1.70
1.90
2.10
2.50
2.80
3.20
2.20
2.50
3.00
3.80
4.00
5.30
6.30
7.20
1.830
1.250
0.880
0.550
0.500
0.310
0.250
0.200
0.150
0.120
0.090
0.080
0.050
0.040
0.030
4.400
3.000
2.100
1.290
1.170
0.720
0.600
0.470
0.380
0.300
0.220
0.190
0.130
0.100
0.080
1.25
1.50
2.00
2.50
3.25
3.75
4.50
5.50
6.75
8.00
9.25
12.50
15.00
18.75
8.20
9.60
11.40
12.60
15.60
19.80
24.00
1.35
1.60
1.85
2.50
3.00
3.75
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.
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.
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
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.
)
* Effective January 1, 2010, all 72R PTC products will be manufactured Halogen Free (HF). Existing Non-Halogen Free 72R PTC products may continue to be sold, until supplies are depleted.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/22/17