Ceramic packaged current sensing resistor CTS 73WE7R039F with thick film construction and matte tin finish

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Product Description

Product Overview

The CTS 73WLx & 73WEx Series Current Sensing Resistors are ceramic packaged devices designed for accurate current detection and limiting. They offer excellent electrical and thermal characteristics, making them suitable for a wide range of industrial and electronic applications.

Product Attributes

Brand: CTS
Construction: Thick Film
Terminal Finish: Matte Tin (e3)
Reflow Capable: per JEDEC J-STD-020, +260C maximum
Packaging: Tape and Reel
73WEx: Lead Free Design
73WLX: RoHS Compliant in Accordance with EU Directive 2011/65/EU and 2015/863 - Lead-Free Termination Finish - Exemption 7(c)-I, Electrical and electronic components containing lead [Pb] in glass

Technical Specifications

Model Type	Package Size [Inch [mm]]	Rated Power [Watts] @ +70C	Resistance Range [m]	Resistor Tolerance [%]	Temperature Coefficient	Operating Temperature Range	Working Voltage [max V]	Overload Voltage [max V]
73WL4 / 73WE4	1206 [3216]	0.75	5 - 910	1, 5	200ppm/C (for 100-910m), 500ppm/C (for 10-33m), 350ppm/C (for 36-91m)	-55C to +155C	200	400
73WL6 / 73WE6	2010 [5025]	1.0	5 - 910	1, 5	200ppm/C (for 100-910m), 500ppm/C (for 10-33m), 350ppm/C (for 36-91m)	-55C to +155C	200	400
73WL7 / 73WE7	2512 [6432]	2.0	5 - 910	1, 5	200ppm/C (for 100-910m), 500ppm/C (for 10-33m), 350ppm/C (for 36-91m)	-55C to +155C	200	400

Applications

Current Detection
Current Limiting
Regulated Battery Circuits
Motor Control
Power Supply
Hard Disk Drives
Inverter/Converter
Industrial Equipment
Infotainment Systems

Environmental Parameters

Test	Test Description	Maximum Delta R [%]
Temperature Coefficient	Measured temperature at -55C to 155C	200ppm/C (Note 1)
Short-Time Overload	Apply 2.5 times the rated voltage, 5 seconds, maximum 100V	2.0
Insulation Resistance	Over 10⁹ ohm Measured at terminals and center of resistor by D.C. 100V 15V in 1 minute [JIS C 5202]	-
Dielectric Withstanding Voltage	No Breakdown Applied at terminals and center of resistor on A.C. 400V, 1 minute [JIS C 5201-1 4.7]	-
Resistance to Solder Heat	No Damage Immerse in solder, +260C 5C, 10 1 seconds	1.0
Solderability	Over 95% Coverage Immerse terminal in solder [Sn3Ag0.5Cu], +245C 0.5C, 3 0.5 seconds [JIS C 5201-1 4.17]	-
High Temperature Exposure	1,000 hours @ +155C 2C, bias load 0% power [JIS C 5201-1 4.23.2]	3.0
Change of Temperature	30 minutes @ -55C, 10 minutes @ +25C, 30 minutes @ +155C, 10 minutes @ +25C; 1,000 cycles	1.0
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, 90% - 95% relative humidity, bias load 10%, on time 90 minutes/off time 30 minutes	3.0
Endurance [Rated Load]	1,000 hours @ +70C 3C, bias load, on time 90 minutes/off time 30 minutes	3.0
Resistance to Solvent	No Damage Immerse in Isopropyl alcohol, +20C to +25C, 60 5 seconds	-
Terminal Strength [Bending]	3mm bending, 1mm/second, hold 5 seconds	0.1