Littelfuse 2920L User Manual
POLY-FUSE® Resettable PTCs
Surface Mount > 2920L Series
2920L Series
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50119118
RoHS
Description
The 2920L Series PTC provides surface mount overcurrent
protection for medium voltage (≤60V) applications where
resettable protection is desired.
Features
• RoHS compliant, lead-free
and halogen-free
• High voltage
• Low-prole
• Fast response to fault
currents
Applications
• IEE1394 port protection
• Powered ethernet port
• Low voltage telecom
equipment protection
protection (IEEE 802.3 af)
• Automotive electronic
control module protection
Electrical Characteristics
Maximum Time
Part Number Marking
I
hold
(A)
I
V
(A)
trip
(Vdc)
max
I
max
(A)
P d
typ.
(W)
To Trip
Current
(A)
Time
(Sec.)
2920L030 LF030 0.30 0.60 60 10 1.50 1.50 3.00 1.200 3.000 4.800
2920L050 LF050 0.50 1. 00 60 10 1.50 2.50 4.00 0.350 0.870 1.400
2920L075 LF075 0.75 1.50 30 40 1.50 8.00 0.30 0.350 0.670 1.000
2920L075/60 LF075-60 0.75 1.50 60 10 1.50 8.00 0.30 0.300 0.60 0.950
2920L100 LF100 1. 10 2.20 33 40 1.50 8.00 0.50 0.120 0.270 0.410
2920L125 LF125 1.25 2.50 15 40 1.50 8.00 2.00 0.070 0.160 0.250
2920L150 LF150 1.50 3.00 33 40 1.50 8.00 2.00 0.080 0.150 0.230
2920L185 LF185 1.85 3.70 33 40 1.50 8.00 2.50 0.050 0.110 0.150
2920L200 LF200 2.00 4.00 15 40 1.50 8.00 5.00 0.050 0.090 0.125
2920L200/24 LF200-24 2.00 4.00 24 40 1.50 8.00 5.00 0.050 0.090 0.125
2920L250 LF250 2.50 5.00 15 40 1.50 8.00 10.00 0.035 0.060 0.085
2920L260 LF260 2.60 5.00 6 40 1.50 8.00 10.00 0.025 0.050 0.075
2920L300 LF300 3.00 5.00 6 40 1.50 8.00 20.00 0.015 0.033 0.048
2920L300/15 LF300-15 3.00 5.00 15 40 1.50 8.00 20.00 0.015 0.033 0.048
2920L500/16 LF500-16 5.00 10.00 16 40 2.0 20.00 5.00 0.005 - 0.025
I
= Hold current: maximum current device will pass without tripping in 20°C still air.
hold
= Trip current: minimum current at which the device will trip in 20°C still air.
I
trip
= Maximum voltage device can withstand without damage at rated current (I max)
V
max
= Maximum fault current device can withstand without damage at rated voltage (V
I
max
= Power dissipated from device when in the tripped state at 20°C still air.
P
d
= Minimum resistance of device in initial (un-soldered) state.
R
min
= Typical resistance of device in initial (un-soldered) state.
R
typ
= Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec.
R
1max
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
)
max
R
min
(Ω)
Resistance
R
typ
(Ω)
Agency
Approvals
R
1max
(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
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 11/12/13
POLY-FUSE® Resettable PTCs
250S
0.10
1
10
100
1000
0.1 110 100
Current in Amperes
Time in Seconds
0.13A
Surface Mount > 2920L Series
Temperature Rerating
Ambient Operation Temperature
-40°C -20°C 0°C 20°C 40°C 50°C 60°C 70°C 85°C
Part Number
2920L030 0.45 0.40 0.35 0.30 0.25 0.23 0.20 0.17 0.14
2920L050 0.76 0.67 0.59 0.50 0.42 0.38 0.33 0.29 0.23
2920L075 1. 1 3 1. 01 0.88 0.75 0.62 0.56 0.50 0.44 0.34
2920L075/60 1. 1 3 1. 01 0.88 0.75 0.62 0.56 0.50 0.44 0.34
2920L100 1.66 1.47 1.29 1. 10 0.91 0.83 0.73 0.64 0.50
2920L125 1.89 1.68 1.46 1.25 1.04 0.94 0.83 0.73 0.56
2920L150 2.27 2.01 1. 76 1.50 1.25 1. 13 1. 00 0.87 0.74
2920L185 2.80 2.47 2.17 1.85 1.54 1.39 1.22 1.07 0.85
2920L200 3.02 2.68 2.34 2.00 1.66 1.50 1.32 1. 1 6 0.90
2920L200/24 3.14 2.77 2.42 2.00 1.73 1.56 1.38 1.20 0.98
2920L250 3.78 3.35 2.93 2.50 2.08 1.88 1.65 1.45 1. 13
2920L260 3.64 3.25 2.91 2.60 2.26 2.08 1.95 1. 74 1.48
2920L300 4.53 4.02 3.51 3.00 2.52 2.26 1.99 1.75 1.34
2920L300/15 4.20 3.85 3.44 3.00 2.69 2.50 2.31 2.12 1.83
2920L500/16 6.85 6.25 5.65 5.00 4.25 3.88 3.50 2.80 2.25
Notes: The temperature rerating data is only for reference, please contact Littelfuse technical support for detail temperature rerating information.
Hold Current (A)
2920L Series
Average Time Current Curves
0.30A
0.50A
0.75A & 0.75A/60
1.00A
1.25A
1.50A
1000
100
10
Time in Seconds
1
Temperature Rerating Curve
170%
150%
130%
1.85A
2.00A/24V
2.50A
2.60A
3.00A/15V
2920L
110%
90%
70%
50%
Percentage of Rated Current
30%
10%
-40 -30 -20 -10010 20 30 40 50 60 70 80 85
Temperature (°C)
0.10
0.1 110 100
Current in Amperes
The average time current curves and Temperature Rerating curve performance is affected
by a number or variables, and these curves provided as guidance only. Customer must
verify the performance in their application.
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/12/13
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