Circuit Protection
SRF1812 Series
Surface-Mount Devices | 1812 Size
PTC Resettable Fuses
Applications
Features
Resettable over current and over
temperature protection
Small size of 1812
Fast time-to-trip
Small footprint
RoHS complaint
Low resistance
Computer
Portable electronics
Multimedia
Game machines
Telephony and broadband
Mobile phones
Battery
Industrial controls
RoHS
2015/863/EC
Electrical Characteristics
IH
(A)
IT
(A)
V max
(V)
I max
(A)
Time to Trip
Part Number
(A)
SRF1812P200/12
2.0
4.0
12
100
8.0
IH = Hold current: maximum current at which the device will not trip at 25℃ still air reflow
soldering of 260℃ for 20 sec.
IT = Trip current: minimum current at which the device will always trip at 25℃ still air
reflow soldering of 260℃ for 20 sec.
Vmax = Maximum continuous voltage device can withstand without damage at rated current
Imax = Maximum fault current device can withstand without damage at rated voltage.
Ttrip = Maximum time to trip(s) at assigned current reflow soldering of 260℃ for 20 sec.
Pdtyp = Typical power dissipation: typical amount of power dissipated by the device when
in state air environment.
(Sec.)
Pd typ
(W)
Rmin
(Ω)
R1max
(Ω)
1.0
0.8
0.02
0.12
Rmin = Minimum resistance of device in initial (un-soldered) state.
R1max = Maximum resistance of device at 25℃ measured one hour after reflow soldering
of 260℃ for 20 sec.
Value specified is determined by using the PWB with 0.030"*1.5oz copper traces.
Caution: Operation beyond the specified rating may result in damage and possible
arcing and flame.
Thermal Derating Chart Hold Current (A)
Part Number
SRF1812P200/12
1 Document Number: P0F0310133334003B
Ambient Operating Temperature
-40°C
-20°C
0°C
25°C
40°C
50°C
60°C
70°C
85°C
2.88
2.61
2.25
2.00
1.80
1.66
1.45
1.09
0.80
Surface-Mount Devices | 1812 Size
SRF1812 Series
PTC Resettable Fuses
Dimensions
A
Top
View
B
200
B
C
Recommended Pad Layout (mm)
Side
View
Bottom
View
3.45±0.1
B
200
3.15±0.1
1.78±0.1
D
Part Number
SRF1812P200/12
A
B
C
D
Min
Max
Min
Max
Min
Max
Min
4.37
4.73
3.07
3.41
0.60
1.30
0.30
Solder Reflow Recommendation
Recommended reflow methods:IR,hot air oven ,nitrogen oven
Devices can be cleaned using standard industry methods and solvents.
NOTE:
If reflow temperatures exceed the recommended profile,devices may not meet the performance requirements.
Caution: Operation beyond the rated voltage or current may result in rupture electrical arcing or flame
Packaging Options
Part Number
Quantity
SRF1812P200/12
1,500pcs
Reel packaging per EIA -481-1 standard
© 2021 PROSEMI Inc. All Rights Reserved.
Specifications and features are subject to
change without notice.
www.prosemitech.com
The PROSEMI logo, and all other PROSEMI
trademarks are the property of PROSEMI Inc.
All other trademarks are the property of their
respective owners.
2 Document Number: P0F0310133335002B
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