73M Metal Plate Current Sense Resistors Up to 5W Power

Series 73M1A, 73M2A,
73M3x & 73M5
Current Sensing Resistors – Up To 5W Power
FEATURES

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Metal Plate Construction – Copper Alloy
Power Rating @ +70°C, Options 1 – 5 Watts
Resistance Range, 0.25 – 120 milliohms
Operating Temperature to +155°C
EIA Standard Package Sizes
Terminal Finish – Tin (e3)
Reflow capable per JEDEC J-STD-020, 260°C maximum
Tape and Reel Packaging
RoHS/Green Compliant [6/6]
APPLICATIONS
Ideal for applications such as current detection and limiting, regulated battery circuits,
motor control, power supply, hard disk drives, inverter/converter, industrial equipment and automotive.
ORDERING INFORMATION
73M
R
TYPE
TOLERANCE
1A = 1 Watt Rating
2A = 2 Watt Rating
3A = 3 Watt Rating
3B = 3 Watt Rating
5 = 5 Watt Rating
F = ±1%
Notes:
1. No dashes or spaces to appear in part number.
RESISTOR CODE
2. Example Part Numbers:
4, 5 or 6-Character Resistor Code
"R" indicates decimal point.
73M2AR0015F [1.5m Ohms, ±1%]
Ex.
R100 = 100m Ohms
R0015 = 1.5m Ohms
R00025 = 0.25m Ohms
73M3BR050F [50m Ohms, ±1%]
73M3AR00025F [0.25m Ohms, ±1%]
73M5R120F [120m Ohms, ±1%]
Not all performance combinations and resistor values may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
STANDARD RESISTOR VALUES
Standard Resistance Values
4, 5, 6-Digit Codes
Resistor
Resistor
Value
Code
0.00025Ω
R00025
0.00050Ω
R0005
0.0010Ω
R001
0.0015Ω
R0015
0.0020Ω
R002
0.0025Ω
R0025
0.0030Ω
R003
0.0040Ω
R004
0.0050Ω
R005
0.0060Ω
R006
0.0070Ω
R007
0.0080Ω
R008
[Based on EIA E-24 Sequence]
Resistor
Value
0.0090Ω
0.0100Ω
0.0110Ω
0.0120Ω
0.0130Ω
0.0150Ω
0.0160Ω
0.0180Ω
0.0200Ω
0.0220Ω
0.0240Ω
0.0270Ω
Document No. 008-0542-0
Resistor
Code
R009
R010
R011
R012
R013
R015
R016
R018
R020
R022
R024
R027
Resistor
Value
0.0300Ω
0.0330Ω
0.0360Ω
0.0390Ω
0.0430Ω
0.0470Ω
0.0500Ω
0.0510Ω
0.0560Ω
0.0620Ω
0.0680Ω
0.0750Ω
Resistor
Code
R030
R033
R036
R039
R043
R047
R050
R051
R056
R062
R068
R075
Resistor
Value
0.0820Ω
0.0910Ω
0.1000Ω
0.1100Ω
0.1200Ω
Page 1 - 3
www.ctscorp.com
Resistor
Code
R082
R091
R100
R110
R120
Rev. A
Series 73M1A, 73M2A, 73M3x & 73M5
Current Sense Resistor – up to 5W Power
ELECTRICAL CHARACTERISTICS
Type
Rated
Wattage
[Watts]
Resistance
[mΩ]
Tolerance
[%]
73M1A
1
1 - 50
±1
73M2A
2
1 - 75
±1
73M3A
3
0.25 - 3
±1
73M3B
3
4 - 100
±1
73M5
5
1 - 120
±1
Rated Ambient
Temperature
Operating
Temperature
Range
+70°C
-55°C to +155°C
+70°C
-55°C to +155°C
+70°C
-55°C to +155°C
±50
+70°C
-55°C to +155°C
R < 0.010Ω: ±100
R ≥ 0.010Ω: ±50
+70°C
-55°C to +155°C
T.C.R
[ppm/°C]
R ≥ 0.010Ω:
R < 0.010Ω:
R < 0.010Ω:
R ≥ 0.010Ω:
R ≤ 0.001Ω:
R > 0.001Ω:
±50
±100
±100
±50
±200
±100
DERATING CURVE
Rated wattage is the maximum continuous power applicable at ambient temperature from -55°C to +70°C [73M5: -55°C to +105°C].
For ambient temperature above +70°C [+105°C], power rating is in accordance with Derating Curves below.
73M5 Only
MECHANICAL
SPECIFICATION
PACKAGE DRAWING
Dimensions
[mm]
L
W
73M1A
3.2 ±0.3
1.6 ±0.3
73M2A
6.3 ±0.3
3.2 ±0.3
73M3A
6.8 ±0.3
6.5 ±0.3
RECOMMENDED LAND PATTERN
c
Resistance
[mΩ]
±0.3
±0.3
±0.3
Max.
0.5 ±0.3
1.9 ±0.3
1.1 ±0.3
--1.0 - 4.0
4.1 - 75
1.4 Max.
2.2 ±0.3
t
0.6
0.8
0.6
1.3
0.25, 0.50
1.3 Max.
1.2 Max.
73M3B
6.7 ±0.3
7.2 ±0.3
1.3 Max.
73M5
11.4 ±0.3
6.9 ±0.3
1.8 Max.
Type
Dimensions
[mm]
73M1A
A
2.1
73M2A
3.7
73M3A
7.1
73M3B
7.8
73M5
7.5
1.0
1.5
1.8 ±0.3
2.0
1.6 ±0.3
2.5
1.3 ±0.3
3.0
1.1 ±0.3
3.2 ±0.3
1.8 ±0.3
--1.0 - 5.0
5.1 - 120
B
1.4
2.8
2.0
3.8
3.4
3.2
2.9
2.7
4.8
3.4
C
1.6
1.9
3.5
1.4
2.2
2.6
3.2
3.5
4.0
6.8
Resistance
[mΩ]
--1.0 - 4.0
4.1 - 75
0.25 - 1.5
2.0
2.5
3.0
--1.0 - 5.0
5.1 - 120
NOTES
1. Terminal:
Base Metal - Copper [Cu].
Barrier Plating - Nickel [Ni].
Finish Plating – Matte Tin [Sn].
Document No. 008-0542-0
Page 2 - 3
Rev. A
Series 73M1A, 73M2A, 73M3x & 73M5
Current Sense Resistor – up to 5W Power
PACKAGING INFORMATION
MARKING
Part Marking
Type
Rxxx = "R" is the decimal point and 3 digits [E24] are
significant values. See resistor tables for codes.
73M1A
Rxxx = "R" is the decimal point and 3 digits [E24] are
significant values. See resistor tables for codes.
73M5
Rxxx = "R" is the decimal point and 3 digits [E24] are
significant values. See resistor tables for codes.
73M2A
Rxxx = "R" is the decimal point and 3 digits [E24] are
significant values. See resistor tables for codes.
73M3x
Nominal resistances that includes a decimal point;
marking is denoted by "m" expressing a decimal point
in milliohms and three digits. Ex. 1m50 [1.5m Ohms]
Nominal resistances that includes a decimal point;
marking is denoted by "m" expressing a decimal point
in milliohms and three digits. Ex. 0m25 [0.25m Ohms]
EMBOSSED TAPE
Type
W
P1
E
F
Do
73M1A
8.00 ±0.15
4.00 ±0.10
3.50 ±0.10
73M2A
12.00 ±0.15
4.00 ±0.10
5.50 ±0.10
1.75 ±0.10
73M3A
12.00 ±0.15
8.00 ±0.10
73M3B
12.00 ±0.15
12.00 ±0.10
5.50 ±0.10
73M5
24.00 ±0.30
12.00 ±0.10
11.50 ±0.10
P0
P2
1.55 ±0.05
5.50 ±0.10
1.50 ±0.05
4.00 ±0.10
2.00 ±0.10
1.55 ±0.05
Ao
Bo
Ko
t
1.83 ±0.10
3.48 ±0.10
0.90 ±0.10
0.20 ±0.05
3.50 ±0.10
6.74 ±0.10
1.10 ±0.10
0.20 ±0.05
6.75 ±0.10
7.15 ±0.10
1.70 ±0.10
0.25 ±0.05
7.70 ±0.10
7.15 ±0.10
1.20 ±0.10
0.25 ±0.05
7.20 ±0.10
11.80 ±0.10
1.70 ±0.10
0.30 ±0.10
REEL
[mm]
Quantity
Per Reel
W
73M1A
4,000
12.0 ±0.5
73M2A
4,000
16.2 ±0.5
73M3A
1,000
16.2 ±0.5
73M3B
1,000
16.2 ±0.5
73M5
500
Type
24.4
M
178 ±1.0
A
B
C
2.0 ±0.5
13.2 ±0.5
21.7 ±0.5
2.5 ±0.6
13.5 ±0.6
21.9 ±0.6
D
60.0 ±0.5
+2.0
-0.0
Document No. 008-0542-0
Page 3 - 3
Rev. A
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