www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
2920L Series
Specifications are subject to change without notice.
1
Electronics Designers Guide
2920L Series
The 2920L series device provides surface mount
overcurrent protection for medium voltage (≤60V)
applications where resettable protection is desired.
Electrical Characteristics
Part Number Marking I hold
(A)
I trip
(A)
V max
(Vdc)
I max
(A)
P d
max.
(W)
Maximum Time
To Trip Resistance Agency
Approvals
Current
(A)
Time
(Sec.)
R min
(Ω)
R typ
(Ω)
R 1max
(Ω)
2920L030 LF030 0.30 0.60 60 10 1.50 1.50 3.00 1.200 3.000 4.800 X X
2920L050 LF050 0.50 1.00 60 10 1.50 2.50 4.00 0.350 0.870 1.400 X X
2920L075 LF075 0.75 1.50 30 40 1.50 8.00 0.30 0.350 0.670 1.000 X X
2920L100 LF100 1.10 2.20 33 40 1.50 8.00 0.50 0.120 0.270 0.410 X X
2920L125 LF125 1.25 2.50 15 40 1.50 8.00 2.00 0.070 0.160 0.250 X X
2920L150 LF150 1.50 3.00 33 40 1.50 8.00 2.00 0.080 0.150 0.230 X X
2920L185 LF185 1.85 3.70 33 40 1.50 8.00 2.50 0.065 0.110 0.150 X X
2920L200 LF200 2.00 4.00 15 40 1.50 8.00 5.00 0.050 0.090 0.125 X X
2920L200/24 LF200-24 2.00 4.00 24 40 1.50 8.00 5.00 0.050 0.090 0.125 X X
2920L250 LF250 2.50 5.00 15 40 1.50 8.00 10.00 0.035 0.060 0.085 X X
2920L260 LF260 2.60 5.00 6 40 1.50 8.00 10.00 0.025 0.050 0.075 X X
2920L300 LF300 3.00 5.00 6 40 1.50 8.00 20.00 0.015 0.033 0.048 X X
2920L300/15 LF300-15 3.00 5.00 15 40 1.50 8.00 20.00 0.015 0.033 0.048 X X
Description
I hold = Hold current: maximum current device will pass without tripping in 20°C still air.
I trip = Trip current: minimum current at which the device will trip in 20°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 (Vmax)
P d = Power dissipated from device when in the tripped state at 20°C still air.
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 20°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.
Agency Approvals
AGENCY AGENCY FILE NUMBER
E183209
R50082521
Features
Applications
• RoHS compliant and
lead-free
• Fast response to fault
currents
• High voltage
• Low-profile
• IEE1394 port protection
• Powered ethernet port
protection (IEEE 802.3 af)
• Automotive electronic
control module protection
• Low voltage telecom
equipment protection
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
2920L Series
Specifications are subject to change without notice.
2
Electronics Designers Guide
Ambient Operation Temperature
-40°C -20°C 0°C 23°C 40°C 50°C 60°C 70°C 85°C
Part Number Hold Current (A)
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 1.13 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 1.16 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
Temperature Rerating
Temperature Rerating CurveAverage Time Current Curves
CURRENT IN AMPERES
TIME IN SECONDS
0.001
0.010
0.100
1
10
100
1000
10000
100000
0.100 1 10 1000.02
0.100A
0.300A
0.500A
0.750A
1.25A
1.50A
1.85A
2.00A/24V
2.00A
2.50A
2.60A
3.00A/15V
3.00A
2920L Series
Specifications are subject to change without notice.
Note: 1.00 means the number one with two decimal places. AKL V3.9 06.05.10
1.00A
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.
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
2920L Series
Specifications are subject to change without notice.
3
Electronics Designers Guide
Environmental Specifications
Soldering Parameters
Condition Reflow
Peak Temp/ Duration Time 260°C / 10 Sec
Time above liquids (TAL) 220°C 60 Sec ~ 100 Sec
Preheat 120°C~ 180°C 50 Sec ~ 150 Sec
Storage Condition 0°C~35°C, <
=70%RH
• Recommended reflow methods: IR, vapor phase oven, hot air
oven, N2 environment for lead-free
• Devices are not designed to be wave soldered to the bottom side
of the board.
• Recommended maximum paste thickness is 0.25mm (0.010 inch)
• 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.
Operating/Storage
Temperature -40°C to +85°C
Maximum Device Surface
Temperature in Tripped State 125°C
Passive Aging +85°C, 1000 hours
±5% typical resistance change
Humidity Aging +85°C, 85%R.H. 1000 hours
±5% typical resistance change
Thermal Shock
MIL-STD-202 Method 107G
+85°C/-40°C 20 times
-30% typical resistance change
Solvent Resistance MIL-STD-202, Method 215
Vibration MIL-STD-883C, Method
2007.1, Condition A
Physical Specifications
Terminal Material Solder-Plated Copper (Solder Material:
Matte Tin(Sn))
Lead Solderability Meets EIA Specification RS186-9E, ANSI/
J-STD-002 Category 3.
Preheating
120
180
220
260
060 to 100
Temperature (°C)
Soldering Cooling
120
50 to 150
Time(s)
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©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
2920L Series
Specifications are subject to change without notice.
4
Electronics Designers Guide
Dimensions (mm)
C
Top
View
Pad
Layout
Side
View
Bottom
View
5.30 mm
(.209”)
4.60 mm
(.181”)
2.0mm
(.079”)
D
MARKING CODE VARIES
WITH AMPERAGE AND VOLTAGE RATING
(SEE CHART)
SHOWN ARE:
- 1.5A/33V RATING (LEFT)
- 2.0A/24V RATING (RIGHT)
E
A
B
150
150
200
-24
Part Number
A B C D E
Inches mm Inches mm Inches mm Inches mm Inches mm
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min Max. Min. Max.
2920L030 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L050 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L075 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L100 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.02 0.04 0.55 1 0.01 0.3 0.01 0.08 0.25 2
2920L125 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.02 0.04 0.55 1 0.01 0.3 0.01 0.08 0.25 2
2920L150 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L185 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L200 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L200/24 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L250 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L260 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.02 0.04 0.55 1 0.01 0.3 0.01 0.08 0.25 2
2920L300 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
2920L300/15 0.26 0.31 6.73 7.98 0.19 0.21 4.8 5.44 0.03 0.05 0.75 1.25 0.01 0.3 0.01 0.08 0.25 2
Part Numbering System
PACKAGING STYLE
SIZE
L: LITTELFUSE SURFACE MOUNT PPTC
I
HOLD
CURRENT CODE (SEE TABLE BELOW)
/XX: SPECIAL VOLTAGE RATING (NOT APPLICABLE TO ALL PARTS)
QUANTITY CODE: D=1500 P=2000
R: Tape & Reel
2920 L 200 /24 D R
SERIES
www.littelfuse.com
©2006 Littelfuse
POLYFUSE® Resettable PTCs
Surface Mount
2920L Series
Specifications are subject to change without notice.
5
Electronics Designers Guide
Packaging
I hold (A) I hold Code Voltage
Option
Packaging
Option Quantity Quantity &
Packaging Codes
0.30 030 Tape and Reel 1500 DR
0.50 050 Tape and Reel 1500 DR
0.75 075 Tape and Reel 1500 DR
1.10 100 Tape and Reel 2000 PR
1.25 125 Tape and Reel 2000 PR
1.50 150 Tape and Reel 1500 DR
1.85 185 Tape and Reel 1500 DR
2.00 200 Tape and Reel 1500 DR
/24 Tape and Reel 1500 DR
2.50 250 Tape and Reel 1500 DR
2.60 260 Tape and Reel 2000 PR
3.00 300 Tape and Reel 1500 DR
/15 Tape and Reel 1500 DR
