72R020X Datasheet, PDF (1/7 Pages) Littelfuse – POLYFUSE Resettable PTCs

72R Series
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E183209
R50119318
POLYFUSE^® Resettable PTCs
Radial Leaded > 72R Series
Description
The 72R Series is designed to provide overcurrent
protection to 72Vdc maximum voltage with a maximum
40A short circuit rating.
Features
t

3P)4
$PNQMJBOU
BOE



t
3FTFUUBCMF
GFBUVSF
lead-free
t
*EFBM
GPS
B
CSPBE
SBOHF
PG

t
7ED
NBY
WPMUBHF
XNBY
general electronics using a
40A short circuit rating
low voltage power supply
Applications
t

-PBE
QSPUFDUJPO
PO
XJEF
t
$PNQVUFS
QFSJQIFSBMT
range of low voltage power
supplies
t
(FOFSBM
FMFDUSPOJDT
t
$PNQVUFST
Electrical Characteristics
Part Number
72R020X
72R025X
72R030X
72R040X
72R050X
72R065X
72R075X
72R090X
72R110X
72R135X
72R160X
72R185X
72R250X
72R300X
72R375X
I _hold
(A)
0.20
0.25
0.30
0.40
0.50
0.65
0.75
0.90
1.10
1.35
1.60
1.85
2.50
3.00
3.75
I _trip
(A)
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
V _max
(Vdc)
72
72
72
72
72
72
72
72
72
72
72
72
72
72
72
Maximum Time
I _max
(A)
P_d(Wty) p.
To Trip
Current
Time
(A)
(Sec.)
40
0.41
1.00
2.20
40
0.45
1.25
2.50
40
0.49
1.50
3.00
40
0.56
2.00
3.80
40
0.77
2.50
4.00
40
0.88
3.25
5.30
40
0.92
3.75
6.30
40
0.99
4.50
7.20
40
1.50
5.50
8.20
40
1.70
6.75
9.60
40
1.90
8.00
11.40
40
2.10
9.25
12.60
40
2.50
12.50
15.60
40
2.80
15.00
19.80
40
3.20
18.75
24.00
Resistance
R _min
(Ω)
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
R _1max
(Ω)
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
Agency
Approvals
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
I _hold = Hold current: maximum current device will pass without tripping in 23°C still air.
I _trip = Trip current: minimum current at which the device will trip in 23°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 23°C still air.
R _min = Minimum resistance of device in initial (un-soldered) state.
R _1max = Maximum resistance of device at 23°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.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/72R.html for current information.
139
Revised: April 3, 2009
72R Series