Low Resistance Metal Alloy
Power Resistors
LRMAP3920
Resistancerange0.2mΩto3mΩ
Excellentlong-termstability
Standardpowerrangupto5W
Thermalsubstratepowerrangupto10W
Currentsensingforpowerelectronics
AEC-Q200qualied
Dimensions in mm and weight in mg
Type L
±0.3
L1
+0.2
-0.3
H
+0.3
-0.2
A
max
D
±0.5
B
±0.1
T
nom
Wt.
nom
LRMAP3920A-R0002
10.0
4.0
5.2 0.6 2.0 0.5
1.50 694
LRMAP3920B-R0003
5.0
1.43 608
LRMAP3920B-R0005 0.85 380
LRMAP3920B-R0007 0.62 271
LRMAP3920B-R001 0.43 188
LRMAP3920C-R001 1.36 542
LRMAP3920C-R0015 0.90 361
LRMAP3920C-R002 0.67 277
LRMAP3920C-R003 0.45 180
LRMAP3920
Alloytype A B C
Resistancevalue mΩ 0.2 0.3 0.5 0.7 1 1 1.5 2 3
Powerrang(standard),Pr1201W5 4 5 4.5 4 3
Powerrang(thermalsubstrate),Prts70 2W10 7 5
Overloadrang(5s)1W25 20 25 23 20 15
Connuouspulseenergy J11 13 8 6 4 12 9 6 4
Internalthermalimpedance,Rthi °C/W 2.5 4 6 9 12 7 11 14 17
Resistancetolerance %1
TCR(20to60°C) ppm/°C ±200 ±150 ±50
Thermal EMF µV/°C <2
Inductance nH <3
Ambienttemperature °C -55 to 170
Marking
The component is laser marked with “3920”, alloy type, ohmic value and tolerance.
Solvent Resistance
The component is resistant to all normal industrial cleaning solvents suitable for printed circuits.
Construcon
The component is formed from a connuous band of E-beam welded precision resisve strip. Various alloys are used based on the
resistance value.
Electrical Data
Physical Data
Note 1: Mounted on FR4 board. See Thermal Data and Mounng secon for details.
Note 2: Mounted on thermal substrate. See Thermal Data and Mounng secon for details.
Resistors
06.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
AllpartsarePb-freeandcomplywithEUDirecve2011/65/EUamendedby(EU)2015/863(RoHS3)AllpartsarePb-freeandcomplywithEUDirecve2011/65/EUamendedby(EU)2015/863(RoHS3)
Test Method ±ΔR%
Typical Maximum
LoadLife 1000 hours, cyclic load at Pr120 0.5 1.0
ShortTermOverload 5 seconds, 5 x Pr120 0.1 0.5
HighTemperatureExposure 1000 hours, 170°C 0.3 1.0
TemperatureCycle 1000 cycles, -55 to +125°C, 15 minute dwell 0.1 0.5
LowTemperatureStorage 1000 hours, -55°C 0.1 0.2
BiasedHumidity 1000 hours, 85°C, 85%RH 0.2 1.0
MoistureResistance MIL-STD-202 method 106 0.1 0.2
Vibraon MIL-STD-202 Method 204 0.1 0.2
MechanicalShock MIL-STD-202 Method 213 0.1 0.5
BoardFlex AEC Q200-005 No damage
Terminal Strength AEC Q200-006 No damage
ResistancetoSolderHeat MIL-STD-202 Method 210 0.3 0.5
Solderability J-STD-002 95% coverage
ResistancetoSolvents MIL-STD-202 Method 215 No damage
Nominal Reference Mounng Pad Dimensions (mm)
a b L
6.2 2.7 5.6
Low Resistance Metal Alloy
Power Resistors
LRMAP3920
Performance Data
Thermal Data & Mounng
FR4 board details: 102x51mm, high Tg FR4 board with 70µm (2 ounce) inner and outer Cu planes or similar substrate, such that terminal
temperature is maintained at ≤120°C.
Thermal substrate details: DBC or similar thermal substrate, such that terminal temperature is maintained at ≤70°C.
Hotspot
Range Hotspot
Range
Terminal
Range
Terminal
Range
06.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
Pulse and Overload Performance
Low Resistance Metal Alloy
Power Resistors
LRMAP3920
06.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
C-R003
A-R0002
E=1J
E=10J
E=100J
E=1KJ
Measurement
Resistance tesng for the LRMAP3920 is performed on the underside of the copper contacts using the following method.
Measurement current ≥1.5mΩ: 1A
<1.5mΩ: 3A
Probe spacing along component length 8.80mm
Probe spacing across component width 2.44mm
Probe p diameter ≤0.5mm
Processing
LRMAP3920 series resistors are suitable for IR reow soldering. The recommended reow prole for Pb-free soldering, for example using SAC387 alloy (Sn
95.5%, Ag 3.8%, Cu 0.7%), is as follows:
Pre-heat: 30s to 45s at 180°C
Soldering: 20s to 40s at 250°C
Peak: 260°C
All dimensions in mm
LRMAP3920
Type
L
±1.00
M
±1.00
N
+0.30/
-0.10
W
+0.30/
-0.05
E
±0.10
F
+0.10
D0
+0.10/
-0.0
D1
+0.10/
-0.0
P0
±0.10
P1
±0.10
P2
±0.10
P0x10
±0.20
t
+0.15/
-0.10
A0
+0.15/
-0.10
B0
±0.13
K0
±0.10
(B)-R001
(B)-R0007
(C)-R002
(C)-R003 330 21.4 2.0 16.00 1.75 7.50 1.50 1.50 4.00 8.00 2.00 40.00 0.30 5.55 10.47
1.25
All remaining
values 2.20
B’
D0
P2 P0
EF
W
BP1
5°
5°
A0
SECTION A - A’
D1
SECTION B - B’
K0
B0
AA’
Packaging
Low Resistance Metal Alloy
Power Resistors
LRMAP3920
LRMAP3920 resistors are packed in 16mm plasc tape, 3000 pieces per reel.
M
N
L
t
06.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
Ordering Procedure
Example: LRMAP3920C-R0015FT (1.5 milliohms ±1%, Pb-free)
LRMAP3920 Series
www.electronicsresistors.com
Ordering Procedure
Example: LRMAP3920C-R0015FT (1.5 milliohms ±1%, Pb-free)
L
R
M
A
P
3
9
2
0
C
-
R
0
0
1
5
F
T
1
2
3
4
5
1
2
3
4
5
Type Alloy Value Tolerance
Packing
LRMAP3920
A
4 / 5 characters
T = Plastic tape
3000/reel
B
R = ohms
C
F = ±1%