ASMD1812 Series Surface Mount PTC Devices
PRODUCT DATASHEET
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ASMD1812 Series Surface Mount PTC Devices
Description
The ASMD1812 series provides surface mount resettable overcurrent protection with holding current from 0.1A to 3.5A. This series offers complete portfolio in terms of holding current and working voltage, and is suitable for wide range of applications.
Features
● ● ●●●●
RoHS compliant and lead-freeLow profileHalogen-freeFast response to fault currentCompact design saves board spaceCompatible with high temperature solders
USB hubs, ports and peripheralsMotherboard USB & IEEE 1394 protectionSet-top-box and HDMIOptical disk drivesGame console port protectionGeneral electronics
Applications
● ● ● ●●
Agency Approvals
Agency File Number
pending
pending
Regulation Standard
2002/95/EC
EN14582
JDT FUSE Industrial Corp.
www.jdtfuse.com
Environmental Specifications
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I hold = Hold Current. Maximum current device will not trip in 25°C still air.I trip = Trip Current. Minimum current at which the device will always trip in 25°C still air.V max = Maximum operating voltage device can withstand without damage at rated current (Imax).I max = Maximum fault current device can withstand without damage at rated voltage (V max).Pd = Power dissipation when device is in the tripped state in 25°C still air environment at rated voltage.Ri min/max = Minimum/Maximum device resistance prior to tripping at 25°C.R1max = Maximum device resistance is measured one hour post reflow.CAUTION : Operation beyond the specified ratings may result in damage and possible arcing and flame.
Test
Conditions Resistance change
ASMD1812 Series Surface Mount PTC Devices
Passive agingHumidity agingThermal shockResistance to solvent Vibration Ambient operating conditions : - 40 °C to +85 °CMaximum surface temperature of the device in the tripped state is 125 °C
+85°C, 1000 hrs.+85°C, 85% R.H. , 168 hours+85°C to -40°C, 20 timesMIL-STD-202,Method 215MIL-STD-202,Method 201
±5% typical±5% typical±33% typicalNo changeNo change
Performance Specification
Model V max(V dc)
I max(A)
I hold@25°C
(A)
I trip@25°C
(A)
P dTyp.(W)
MaximumTime To Trip Resistance
Current(A)
Time(Sec)
R i min(Ω)
R1max(Ω)
ASMD1812-010ASMD1812-014ASMD1812-020ASMD1812-030ASMD1812-050
ASMD1812-050-30ASMD1812-050-60
ASMD1812-075ASMD1812-110
ASMD1812-110-16ASMD1812-125ASMD1812-150
ASMD1812-150-16ASMD1812-160ASMD1812-200ASMD1812-260ASMD1812-300ASMD1812-350
30.060.030.030.015.030.060.013.28.016.016.08.016.08.08.08.08.06.0
100100100100100100100100100100100100100100100100100100
0.100.140.200.300.500.500.500.751.101.101.251.501.501.602.002.603.003.50
0.300.340.400.601.001.001.001.502.202.202.503.003.002.804.005.005.006.00
0.80.80.80.80.80.80.80.80.80.80.80.80.80.80.80.80.82.0
0.51.58.08.08.08.08.08.08.08.08.08.08.08.08.08.08.010.0
1.500.150.020.100.150.150.150.200.300.300.400.500.501.002.002.504.004.00
0.7500.6500.3500.2500.1500.1500.1500.0900.0500.0500.0500.0400.0400.0300.0200.0150.0120.008
15.0006.0005.0003.0001.0001.0001.4000.4500.2500.2500.1400.1600.1600.1300.1000.0500.0400.030
JDT FUSE Industrial Corp.
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Thermal Derating Curve
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ASMD1812 Series Surface Mount PTC Devices
Average Time-Current Curve
CURRENT IN AMPERES
TIM
E IN
SE
CO
ND
Derating Curves for ASMD1812 Series
Temperature (°C )
Per
cent
age
of D
erat
ed C
urre
nt
020406080
100120140160
-40 -20 0 20 40 60 80
0.01
0.1
1
10
100
0.1 1 10 100
0.30A
0.50A
0.75A
1.00A
1.25A
1.50A
1.85A
2.0A
2.50A
2.60A
3.00A
3.50A
JDT FUSE Industrial Corp.
www.jdtfuse.com
Page 4/7
ASMD1812 Series Surface Mount PTC Devices
Soldering Parameters
Profile Feature Pb-Free Assembly
Average Ramp-Up Rate(Ts max to T p)Preheat -Temperature Min(Ts min) -Temperature Max(Ts max) -Time(Ts min to Ts max)Time maintained above: -Temperature(TL) -Time(tL)Peak Temperature(Tp)Ramp-Down RateTime 25℃ to Peak TemperatureStorage Condition
3℃/second mac.
150℃200℃60~180 seconds
217℃60~150 seconds260℃6℃/second max.8 minutes max0℃~35℃,≤70%RH
Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment for lead-freeRecommended maximum paste thickness is 0.25mmDevices can be cleaned using standard industry methods and solvents.Note 1:All temperature refer to topside of the package, measured on the package body surface.Note 2: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements.
t L 60~150 s
tsPreheat 60~180 s
t 25°C to peak
Time
TL 217
TP 260
25
TP 20~40 S
Ramp-up Critical Zone TL to TP
Ramp-down
Tsmax
Tsmin
150
200
Tem
pera
ture
(°C
)
Thermal Derading Chart
Model- 40°C - 20°C 0°C 25°C 40°C 50°C
Maximum ambient operating temperature (Tmao) vs. hold current (Ihold)
60°C 70°C 85°C
0.160.230.290.440.591.101.601.592.002.302.282.102.883.904.154.84
ASMD1812-010ASMD1812-014ASMD1812-020ASMD1812-030ASMD1812-050ASMD1812-075ASMD1812-110
ASMD1812-110-16VASMD1812-125ASMD1812-150
ASMD1812-150-16VASMD1812-160ASMD1812-200ASMD1812-260ASMD1812-300ASMD1812-350
0.140.190.260.390.570.991.451.441.752.052.031.962.613.423.764.39
0.120.170.230.350.550.871.281.271.521.771.751.882.252.963.464.04
0.100.140.200.300.500.751.101.101.251.501.501.602.002.603.003.50
0.080.120.170.260.450.630.920.921.001.231.211.261.802.332.552.98
0.050.080.120.180.300.450.660.640.750.820.790.841.091.351.611.88
0.070.100.150.230.430.570.830.820.951.091.071.121.662.072.282.66
0.060.090.140.210.350.490.710.700.900.950.930.981.451.942.012.35
0.030.060.100.150.230.350.520.500.530.610.580.630.801.001.331.55
JDT FUSE Industrial Corp.
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ASMD1812 Series Surface Mount PTC Devices
Physical Dimensions(mm.)
Termination Pad CharacteristicsTerminal pad materials:Tin-plated Nickel-CopperTerminal pad solder ability:Meets EIA specification RS186-9E and ANSI/J-STD-002 Category 3.
ModelMin. Max. Min. Max. Min.
A B C D E
Max. Min. Min.
ASMD1812-010ASMD1812-014ASMD1812-020ASMD1812-030ASMD1812-050
ASMD1812-050-30VASMD1812-050-60V
ASMD1812-075ASMD1812-110
ASMD1812-110-16VASMD1812-125ASMD1812-150
ASMD1812-150-16VASMD1812-160ASMD1812-200ASMD1812-260ASMD1812-300ASMD1812-350
4.374.374.374.374.374.374.374.374.374.374.374.374.374.374.374.374.374.37
4.734.734.734.734.734.734.734.734.734.734.734.734.734.734.734.734.734.73
3.073.073.073.073.073.073.073.073.073.073.073.073.073.073.073.073.073.07
3.413.413.413.413.413.413.413.413.413.413.413.413.413.413.413.413.413.41
0.300.300.300.300.300.300.300.300.300.300.300.300.300.300.300.300.300.30
0.500.500.500.500.400.701.100.400.400.600.600.400.400.400.500.500.500.50
1.001.001.301.000.901.301.800.900.901.301.301.201.201.201.301.501.501.50
0.250.250.250.250.250.250.250.250.250.250.250.250.250.250.250.250.250.25
Packaging Quantity and Marking
Part Number Quantity
SMD812 SeriesTape & reel packaging per EIA481-1
1,500 pcs/reel3.2±0.1
3.2±0.1
1.78±0.11.78±0.1
JDT FUSE Industrial Corp.
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ASMD1812 Series Surface Mount PTC Devices
Governing Specifications EIA 481-1
WP0P1P2A0B0B1max.D0FE1E2min.TT1max.K0Leader min.Trailer min.Reel DimensionsA max.N min.W1W2
12 ± 0.34.0 ± 0.108.0 ± 0.102.0 ± 0.053.5 ± 0.105.1 ± 0.105.91.50 + 0.1, -05.5 ± 0.051.75 ± 0.1010.250.60.10.9 ± 0.1390160
1786012.4 ± 0.518.4
Tape And Reel Specifications (mm)
Storage And Handling ● Storage conditions:40°C max, 70% R.H.● Devices may not meet specified performance if storage conditions are exceeded.Technology Corp.
D2
K0 B0A0
T
F
W
E1
P2D0P0
P1
W4
W2
W3
W1
F
H1
W
CD
H
JDT FUSE Industrial Corp.
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ASMD1812 Series Surface Mount PTC Devices
Special Voltage Rating(Optional)
Holding Current Rating
Device Dimensions: Length/width(Unit:1/100 inch) Size 4532 mm / 1812 inch
Surface Mount Device
Part Number System
Cross Reference
ASMD 1812 - -
“PolySwitch” is a registered trademark of Tyco Electronics.“POLY-FUSE” is a registered trademark of Littelfuse,Inc.“EVERFUSE” is a registered trademark of Polytronics Technology Corp.
ModelTyco / PolySwitch® Littelfuse / POLY-FUSE® Polytronics / EVERFUSE®
Cross Reference
ASMD1812-010ASMD1812-014ASMD1812-020ASMD1812-030ASMD1812-050
ASMD1812-050-30VASMD1812-050-60V
ASMD1812-075ASMD1812-110
ASMD1812-110-16VASMD1812-125ASMD1812-150
ASMD1812-150-16VASMD1812-160ASMD1812-200ASMD1812-260ASMD1812-300ASMD1812-350
miniSMDC010F-miniSMDC014FminiSMDC020F
-miniSMDC050FminiSMDC050F
-miniSMDC750FminiSMDC110F
miniSMDC110F/16miniSMDC125FminiSMDC150F
miniSMDC150F/12miniSMDC160FminiSMDC200FminiSMDC260FminiSMDC300F
-
1812L0101812L0141812L0201812L0351812L050
1812L050/30-
1812L0751812L110
1812L110/161812L1251812L150
1812L150/121812L1601812L2001812L2601812L300
-
SMD1812P010TFSMD1812P014TFSMD1812P020TFSMD1812P030TFSMD1812P050TF
SMD1812P050TF/30-
SMD1812P075TFSMD1812P110TF
SMD1812P110TF/16SMD1812P125TFSMD1812P150TF
SMD1812P150TF/12SMD1812P160TFSMD1812P200TFSMD1812P260TFSMD1812P300TF
-
JDT FUSE Industrial Corp.
www.jdtfuse.com