Low Resistance/Current Sense Shunt Resistors

Available for various current sensing applications with wide line up

Application examples

TLR：Motors, batteries, DC/DC converter circuits

UR73V／ WU73：Power supply circuits, car electronics like ECUs

Structural Differences between of Thick Film/Metal Plate Low Resistance Resistors

Thick film(UR73V etc.)

Metal plate(TLR2B to 3A)

■After screen printing on the Alumia board, the compound[Metal, Metallic oxide(glass)] is fired at high temp.
■Easy to achieve higher ohmic values through adjusting the value by laser trimming.
■±75×10⁻⁶/K achieved with lower resistive materials

■Clad joining (Cold pressure welding) of Cu electrode on the plate bulk resistive alloy
■Easy to achieve lower ohmic values due to large CSA of the resistive element
■Higher precision （±50×10⁻⁶/K～）achieved with lower T.C.R. alloy （Less than 100×10⁻⁶/K）for Resistive element

Thick Film Low Resistance Resistors achieve high precision

KOA's UR73V & WU73series of Thick film low resistance resistors achieve TCR of ±75×10⁻⁶/K. T.C.R. precision has been significantly improved from the convetional product series.

Product Lineup

General Catalog(12.7MB)

Metal Plate Type Resistor

＊Click checkmark in the table below to access the download page where you can get the following data.
3D Model／Equivalent Circuit／Temperature Rise／Thermal Resistance／One Pulse Limiting Power

Features	Product Series	Resistance Range(Ω)	Power Rating(W)	Size mm (inch)	Tolerance (±%)	T.C.R.(×10^-6/K)
current sensing Small type, Low resistance	TLR(Small)	2m to 10m	1	2012 (0805)	1	±100
current sensing Ultra low resistance	TLR	0.5m to 20m	0.5 to 2	3216 to 6432 (1206 to 2512)	1	±50 to ±150
Large current sensing Ultra low resistance	TLR(High Power)	0.5m to 20m	1 to 5	3216 to 6432 (1206 to 2512)	1	±50 to ±75
Metal Plate Chip Jumper	TLRZ	0.2mΩ max. (0.5mΩ max: 1E)	(Current Rating) 10A to 50A	1005 to 3216 (0402 to 1206)	-	-
Current sensing Low resistance	TLRH	6m to 270m	0.25 to 5	2012 to 6432 (0805 to 2512)	1	±50 to ±75
Current sensing (Low resistance), molded	TSL	5m to 100m	1	6432 (2512)	0.5, 1, 5	±100 to ±180
Current sensing (Low resistance/TCR), molded	SLN	5m to 200m	2	11.5x7 (4527)	0.5, 1, 5	±75 to ±110
Current sensing (Low resistance/TCR), molded	SL(High Power)	3m to 200m	1 to 7	5025 to 11.5x7 (2010 to 4527)	0.5, 1, 5	±50 to ±180, 0 to +200
Metal Plate Chip Jumper, Molded	SLZ	0.5mΩ max.	(Current Rating) 44A	6432 (2512)	-	-
Current sensing (4 terminal), molded	CSR	5m to 50m	1, 2	10.8x6.2 to 12.8x8.2	0.5, 1	±50

Metal Plate Terminal Surface Mount Type Resistor

＊Click checkmark in the table below to access the download page where you can get the following data.
3D Model／Equivalent Circuit／Temperature Rise／Thermal Resistance／One Pulse Limiting Power

Features	Product Series	Image	Catalog	Design Support Data	Resistance (Ω)	Power Rating (W)	Size mm (inch)	Tolerance (±%)	T.C.R.(×10^-6/K)
Current sensing (Low resistance), Low TCR, Molded	SL(Metal)				3m to 360m	0.75 to 2	5025 to 11.5x7 (2010 to 4527)	0.5, 1, 2, 5	±50 to ±180, 0 to +200

Metal Plate Type Resistor

＊Click checkmark in the table below to access the download page where you can get the following data.
3D Model／Equivalent Circuit／Temperature Rise／Thermal Resistance／One Pulse Limiting Power

Features	Product Series	Resistance Range(Ω)	Power Rating(W)	Size(mm)	Tolerance (±%)	T.C.R.(×10^-6/K)
Large current sensing Ultra low resistance	HS	50μ to 200μ	18 to 50	40×15 to 80×22	5	50±25 to 75±50
Large current sensing Ultra low resistance	PSL	0.2m, 0.3m, 0.5m	8, 9	6432 (2512)	1	±115 to ±175 250±100
Large current sensing Ultra low resistance, 4-terminal, low TCR	PSF	0.5m, 1m	3, 5	3.0×3.8 (1216)	1	±50

Thick Film Surface Mount Type Resistor

＊Click checkmark in the table below to access the download page where you can get the following data.
3D Model／Equivalent Circuit／Temperature Rise／Thermal Resistance／One Pulse Limiting Power

Features	Product Series	Resistance Range(Ω)	Power Rating(W)	Size mm (inch)	olerance (±%)	T.C.R.(×10^-6/K)
Low resistance, wide terminal	WK73S	10m to 9.76	0.75 to 2	1220 to 3264 (0508 to 1225)	0.5, 1, 5	0 to +300, ±100 to ±800
Low resistance, wide terminal	WK73S (High power)	10m to 9.76	1.5 to 3	1632 to 3264 (0612 to1225)	0.5, 1, 5	±100 to ±800
Low resistance, wide terminal	WU73	10m to 100m	1, 1.5	1632 (0612)	1	±75 to ±100
Low resistance	SR73	24m to 10	0.1 to 2	0603 to 6432 (0201 to 2512)	0.5, 1, 2, 5	0 to +500, ±100 to ±1000
Low resistance, Low TCR	UR73	10m to 100m	0.125 to 1	1005 to 6432 (0402 to 2512)	1	±100 to ±500
Low resistance, Low TCR, High heat	UR73V	10m to 1	0.5 to 1	2012 to 3216 (0805 to 1206)	1	0 to ＋250, ±75 to ±100