Metal Plate Current Sensing Resistor CTS 73M1AR0025F with Accurate Detection and Thermal Stability

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Product Description

Product Overview

The 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 utilize a special metallic resistor material, providing good electrical and thermal characteristics for reliable performance in various industrial and electronic systems.

Product Attributes

Brand: CTS Corporation
Construction: Metal Plate
Terminal Finish: Matte Tin [e3]
Reflow Capable: per JEDEC J-STD-020, +260C Maximum
Packaging: Tape and Reel
Certifications: JEDEC J-STD-020, JIS C 5201-1, MIL-STD-202

Technical Specifications

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

Test	Maximum Delta R [%]	Notes
Short-Time Overload	0.5 (73M1A, 73M2A, 73M3x) 2.0 (73M5)	Applied electric power equal to 3 times rated power in 5s [JIS C 5201-1 4.13]
Resistance to Solder Heat	0.5	Place on copper sheet [t = 0.2mm] heated by solder, +260C 5C, 5 0.5 seconds
Solderability	Over 95% Coverage	Immerse terminal in solder [Sn3Ag0.5Cu], +245C 0.5C, 3 0.5 seconds [JIS C 5201-1 4.17]
Vibration	0.5	Frequency 10Hz to 55Hz, Pk-Pk amplitude 15mm, sweeping rate 1 minute, 3 directions each 2 hours [JIS C 5201-1 4.22]
High Temperature Exposure	2.0	1,000 hours @ +155C 2C, bias load 0% power [JIS C 5201-1 4.23.2]
Change of Temperature	0.5	30 minutes @ -55C, 3 minutes @ +25C, 30 minutes @ +155C, 3 minutes @ +25C; 5 cycles
Moisture Resistance	1.0	MIL-STD-202, Method 106, 0% power 7a and 7b not required, 1 cycle = 24 hours, 10 cycles
Bias Humidity	1.0	1,000 hours @ +85C 2C, 85% relative humidity, bias load 10%, on time 90 minutes/off time 30 minutes
Endurance [Rated Load]	2.0	1,000 hours @ +70C 3C, bias load, on time 90 minutes/off time 30 minutes

Model Type	Dimensions [mm] L	Dimensions [mm] W	Dimensions [mm] t	Dimensions [mm] c
73M1A	3.2 0.3	1.6 0.3	0.6 0.3	0.5 0.3
73M2A	6.3 0.3	3.2 0.3	1.0 -	1.0 -
73M3A	6.8 0.3	6.5 0.3	1.2 Max.	2.2 0.3
73M3B	7.2 0.3	6.7 0.3	1.3 Max.	1.1 0.3
73M5	11.4 0.3	6.9 0.3	1.8 Max.	1.2 Max.