Circuit Protection
SRF2920 Series
Surface-Mount Devices | 2920 Size
PTC Resettable Fuses
Applications
Features
Computer
Portable electronics
Multimedia
Game machines
Telephony and broadband
Mobile phones
Automotive
Industrial controls
Compact design saves board space
Fast response to fault currents
Compatible with high temperature solders
Low resistance
Low-profile
RoHS compliant, lead-free and halogen-free
RoHS
2015/863/EC
Electrical Characteristics
IH
(A)
IT
(A)
V max
(V)
I max
(A)
Time to Trip
(A)
(Sec.)
SRF2920P030
0.30
0.60
60
10
1.5
3.0
SRF2920P050
0.50
1.00
60
10
2.5
SRF2920P075
0.75
1.50
33
40
SRF2920P100
1.00
2.00
33
SRF2920P125
1.25
2.50
SRF2920P150
1.50
SRF2920P185
Rmin
(Ω)
R1max
(Ω)
1.5
0.600
4.300
3.0
1.5
0.180
1.400
8.0
0.3
1.5
0.100
1.000
40
8.0
0.5
1.5
0.065
0.410
33
40
8.0
2.0
1.5
0.050
0.250
3.00
33
40
8.0
2.0
1.5
0.035
0.230
1.85
3.70
33
100
8.0
2.0
1.5
0.030
0.150
SRF2920P200
2.00
4.00
16
40
8.0
4.5
1.5
0.020
0.120
SRF2920P200/24
2.00
4.00
24
40
8.0
4.5
1.5
0.020
0.120
SRF2920P250
2.50
5.00
16
40
8.0
16.0
1.5
0.018
0.085
SRF2920P260
2.60
5.20
16
40
8.0
20.0
1.5
0.014
0.075
SRF2920P260/24
2.60
5.20
24
100
8.0
18.0
1.5
0.014
0.075
SRF2920P300
3.00
6.00
12
40
8.0
25.0
1.5
0.010
0.055
SRF2920P300/24
3.00
6.00
24
100
8.0
20.0
1.5
0.010
0.055
SRF2920P450
4.50
9.00
16
40
22.5
5.0
1.5
0.005
0.020
Part Number
I hold = Hold current: maximum current device will pass without tripping in 25°C still air.
I trip = Trip current: minimum current at which the device will trip in 25°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 25°C still air.
Pd typ
(W)
R min = Minimum resistance of device in initial (un-soldered) state.
R typ = Typical resistance of device in initial (un-soldered) state.
R 1max = Maximum resistance of device at 25°C measured one hour after tripping or reflow
soldering of 260°C for 20 sec.
1 Document Number: P0F0310130415003J
Surface-Mount Devices | 2920 Size
SRF2920 Series
PTC Resettable Fuses
Thermal Derating Chart Hold Current (A)
Ambient Operating Temperature
Part Number
-40°C
-20°C
0°C
25°C
40°C
50°C
60°C
70°C
85°C
SRF2920P030
0.45
0.40
0.35
0.30
0.25
0.23
0.20
0.17
0.14
SRF2920P050
0.76
0.67
0.59
0.50
0.42
0.38
0.33
0.29
0.23
SRF2920P075
1.13
1.01
0.88
0.75
0.62
0.56
0.50
0.44
0.34
SRF2920P100
1.66
1.47
1.29
1.10
0.91
0.83
0.73
0.64
0.50
SRF2920P125
1.89
1.68
1.46
1.25
1.04
0.94
0.83
0.73
0.56
SRF2920P150
2.27
2.01
1.76
1.50
1.25
1.13
1.00
0.87
0.74
SRF2920P185
2.80
2.47
2.17
1.85
1.54
1.39
1.22
1.07
0.85
SRF2920P200
3.02
2.68
2.34
2.00
1.80
1.70
1.54
1.40
1.30
SRF2920P200/24
3.02
2.68
2.34
2.00
1.80
1.70
1.54
1.40
1.30
SRF2920P250
3.78
3.35
2.93
2.50
2.25
2.13
1.93
1.75
1.63
SRF2920P260
3.93
3.48
3.04
2.60
2.34
2.21
2.00
1.82
1.69
SRF2920P260/24
3.93
3.48
3.04
2.60
2.34
2.21
2.00
1.82
1.69
SRF2920P300
4.53
4.02
3.51
3.00
2.52
2.26
1.99
1.75
1.34
SRF2920P300/24
4.53
4.02
3.51
3.00
2.52
2.26
1.99
1.75
1.34
SRF2920P450
6.80
6.03
5.27
4.50
4.05
3.83
3.47
3.15
2.93
Temperature Rerating Curve
170%
Percentage of Rated Current
150%
130%
110%
90%
70%
50%
30%
10%
-40 -30 -20
-10
0
10
20
30
40
50
60
70
80
Temperature (°C)
2 Document Number: P0F0310130415003J
Surface-Mount Devices | 2920 Size
SRF2920 Series
PTC Resettable Fuses
Dimensions
A
Top
View
B
C
Recommended Pad Layout (mm)
Side
View
4.60
5.30
Bottom
View
2.00
D
P/N
Marking
A
B
C
D
Min
Max
Min
Max
Min
Max
Min
SRF2920P030
T030
6.73
7.98
4.80
5.44
0.75
1.25
0.30
SRF2920P050
T050
6.73
7.98
4.80
5.44
0.75
1.25
0.30
SRF2920P075
T075
6.73
7.98
4.80
5.44
0.65
1.05
0.30
SRF2920P100
T100
6.73
7.98
4.80
5.44
0.65
1.05
0.30
SRF2920P125
T125
6.73
7.98
4.80
5.44
0.65
1.05
0.30
SRF2920P150
T150
6.73
7.98
4.80
5.44
0.90
1.30
0.30
SRF2920P185
T185
6.73
7.98
4.80
5.44
0.90
1.30
0.30
SRF2920P200
T200
6.73
7.98
4.80
5.44
0.45
0.85
0.30
SRF2920P200/24
T200
6.73
7.98
4.80
5.44
0.90
1.30
0.30
SRF2920P250
T250
6.73
7.98
4.80
5.44
0.45
0.95
0.30
SRF2920P260
T260
6.73
7.98
4.80
5.44
0.45
0.85
0.30
SRF2920P260/24
T260
6.73
7.98
4.80
5.44
1.10
1.60
0.30
SRF2920P300
T300
6.73
7.98
4.80
5.44
0.45
0.85
0.30
SRF2920P300/24
T300
6.73
7.98
4.80
5.44
1.10
1.50
0.30
SRF2920P450
T450
6.73
7.98
4.80
5.44
1.10
1.40
0.30
Packaging Options
I hold(A)
Quantity
0.30~1.25A
1,500pcs
1.5A,1.85A,2A/24V,2.6A/24V,3A/24V,4.5A
1,000pcs
2A,2.5A,2.6A,3A
2,000pcs
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
3 Document Number: P0F0310130415003J
The PROSEMI logo, and all other PROSEMI
trademarks are the property of PROSEMI Inc.
All other trademarks are the property of their
respective owners.
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