Littelfuse 72R Series Uživatelský manuál

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91
Revised: July 12, 2010
POLYFUSE
®
Resettable PTCs
© 2010 Littelfuse, Inc
72R Series
Radial Leaded > 72R Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/72R.html for current information.
72R Series
72R Series
The 72R Series is designed to provide overcurrent
protection to 72Vdc maximum voltage with a maximum
40A short circuit rating.
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50119318
Electrical Characteristics
Part Number
I
hold
(A)
I
trip
(A)
V
max
(Vdc)
I
max
(A)
P
d
typ.
(W)
Maximum Time
To Trip
Resistance
Agency
Approvals
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
1max
(Ω)
72R020X 0.20 0.40 72 40 0.41 1.00 2.20 1.830 4.400
XX
72R025X 0.25 0.50 72 40 0.45 1.25 2.50 1.250 3.000
XX
72R030X 0.30 0.60 72 40 0.49 1.50 3.00 0.880 2.100
XX
72R040X 0.40 0.80 72 40 0.56 2.00 3.80 0.550 1.290
XX
72R050X 0.50 1.00 72 40 0.77 2.50 4.00 0.500 1.170
XX
72R065X 0.65 1.30 72 40 0.88 3.25 5.30 0.310 0.720
XX
72R075X 0.75 1.50 72 40 0.92 3.75 6.30 0.250 0.600
XX
72R090X 0.90 1.80 72 40 0.99 4.50 7.20 0.200 0.470
XX
72R110X 1.10 2.20 72 40 1.50 5.50 8.20 0.150 0.380
XX
72R135X 1.35 2.70 72 40 1.70 6.75 9.60 0.120 0.300
XX
72R160X 1.60 3.20 72 40 1.90 8.00 11.40 0.090 0.220
XX
72R185X 1.85 3.70 72 40 2.10 9.25 12.60 0.080 0.190
XX
72R250X 2.50 5.00 72 40 2.50 12.50 15.60 0.050 0.130
XX
72R300X 3.00 6.00 72 40 2.80 15.00 19.80 0.040 0.100
XX
72R375X 3.75 7.50 72 40 3.20 18.75 24.00 0.030 0.080
XX
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.
Description
Features
Applications
t7EDNBYWPMUBHFXNBY
40A short circuit rating
t3P)4DPNQMJBOU-FBE'SFF
and Halogen Free*
t3FTFUUBCMFGFBUVSF
t*EFBMGPSBCSPBESBOHFPG
general electronics using a
low voltage power supply
t-PBEQSPUFDUJPOPOXJEF
range of low voltage power
supplies
t$PNQVUFST
t$PNQVUFSQFSJQIFSBMT
t(FOFSBMFMFDUSPOJDT
* 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.
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Strany 1 - 72R Series

91Revised: July 12, 2010POLYFUSE® Resettable PTCs© 2010 Littelfuse, Inc72R SeriesRadial Leaded > 72R SeriesSpecifications are subject to change with

Strany 2

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Strany 3

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Strany 4 - Part Marking System

94Revised: July 12, 2010POLYFUSE® Resettable PTCs© 2010 Littelfuse, Inc.72R SeriesRadial Leaded > 72R SeriesSpecifications are subject to change wi

Strany 5 - Radial Leaded > 72R Series

95Revised: July 12, 2010POLYFUSE® Resettable PTCs© 2010 Littelfuse, Inc72R SeriesRadial Leaded > 72R SeriesSpecifications are subject to change with

Strany 6 - Tape and Ammo Specifications

96Revised: July 12, 2010POLYFUSE® Resettable PTCs© 2010 Littelfuse, Inc.72R SeriesRadial Leaded > 72R SeriesSpecifications are subject to change wi

Strany 7 - Figure 1

97Revised: July 12, 2010POLYFUSE® Resettable PTCs© 2010 Littelfuse, Inc72R SeriesRadial Leaded > 72R SeriesSpecifications are subject to change with

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