Series 73M1A, 73M2A, 73M3x & 73M5 Current Sensing Resistors – Up To 5W Power FEATURES 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