Current Sensing Resistor CTS 73M3BR033F with Copper Alloy Material and Matte Tin Terminal Finish

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Product Description

CTS 73M Series Current Sensing Resistors

The CTS 73M1A, 73M2A, 73M3x, and 73M5 Series Current Sensing Resistors are metal plate packaged devices designed for excellent accuracy in current detection and limiting applications. These resistors offer good electrical and thermal characteristics due to their special metallic resistor material and are suitable for a wide range of applications including regulated battery circuits, motor control, power supplies, and industrial equipment.

Product Attributes

Brand: CTS
Construction: Metal Plate
Material: Copper Alloy
Terminal Finish: Matte Tin [e3]
Reflow Capable: per JEDEC J-STD-020, +260C Maximum
Packaging: Tape and Reel

Technical Specifications

Model Type	Power Rating [Watts]	Resistance Range [m]	Resistor Tolerance [%]	Rated Ambient Temperature	Operating Temperature Range	Temperature Coefficient (Typical)
73M1A	1.0	0.25 - 50	1	+70C	-55C to +155C	R 0.010: 50ppm/C R
73M2A	2.0	1 - 75	1	+70C	-55C to +155C	R R 0.010: 50ppm/C
73M3A	3.0	0.25 - 3	1	+70C	-55C to +155C	R 0.001: 200ppm/C R > 0.001: 100ppm/C
73M3B	3.0	4 - 100	1	+70C	-55C to +155C	50ppm/C
73M5	5.0	1 - 120	1	+70C	-55C to +155C	R R 0.010: 50ppm/C

Environmental Specifications

Test	Test Description	Maximum Delta R [%]
Short-Time Overload	Applied electric power equal to 3 times rated power in 5s [JIS C 5201-1 4.13]	0.5 [73M1A, 73M2A, 73M3x] 2.0 [73M5]
Insulation Resistance	Over 10⁹ ohm. Measured at terminals and center of resistor by D.C. 100V 15V in 1 minute [JIS C 5201-1 4.6]	-
Dielectric Withstanding Voltage	No Breakdown. Applied at terminals and center of resistor on A.C. 500V, 1 minute [JIS C 5201-1 4.7]	-
Resistance to Solder Heat	No Damage. Place on copper sheet [t = 0.2mm] heated by solder, +260C 5C, 5 0.5 seconds	0.5
Solderability	Over 95% Coverage. Immerse terminal in solder [Sn3Ag0.5Cu], +245C 0.5C, 3 0.5 seconds [JIS C 5201-1 4.17]	-
Vibration	No Damage. Frequency 10Hz to 55Hz, Pk-Pk amplitude 15mm, sweeping rate 1 minute, 3 directions each 2 hours [JIS C 5201-1 4.22]	0.5
Resistance to Solvent	No Damage. Immerse in Isopropyl alcohol, +20C to +25C, 60 5 seconds	-
High Temperature Exposure	1,000 hours @ +155C 2C, bias load 0% power [JIS C 5201-1 4.23.2]	2.0
Change of Temperature	30 minutes @ -55C, 3 minutes @ +25C, 30 minutes @ +155C, 3 minutes @ +25C; 5 cycles	0.5
Moisture Resistance	MIL-STD-202, Method 106, 0% power 7a and 7b not required, 1 cycle = 24 hours, 10 cycles	1.0
Bias Humidity	1,000 hours @ +85C 2C, 85% relative humidity, bias load 10%, on time 90 minutes/off time 30 minutes	1.0
Endurance [Rated Load]	1,000 hours @ +70C 3C, bias load, on time 90 minutes/off time 30 minutes	2.0