Current Sense Resistors - SMD

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CFN-A Metal Foil Current Sensing Resistors

Bourns CFN-A resistors are metal foil resistors used primarily for current sensing applications. These resistors come in packages ranging from 0402 to 1206, and feature resistance ratings from 5mΩ to 40mΩ. Bourns CFN-A metal foil resistors come in both 5% and 1% tolerances. Applications for these current sensing resistors include power supplies, stepper motor drivers, and input amplifiers.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Packaging	Series	Resistance	Power Rating	Tolerance	Temperature Coefficient	Case Code - in	Case Code - mm	Length	Width	Height	Minimum Operating Temperature	Maximum Operating Temperature	Technology	Termination	Termination Style
Current Sense Resistors - SMD .02 OHM 1% 1W 100PPM CFN1206AFX-R020ELF Bourns 1: $0.43 6,233In Stock	Mfr. Part # CFN1206AFX-R020ELF Mouser Part # 652-CFN1206AFX-R020E	Bourns	Current Sense Resistors - SMD .02 OHM 1% 1W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	6,233In Stock	Cut Tape $0.43 $0.273 $0.206 $0.184 Reel $0.109 View $0.159 $0.144 $0.131 $0.099 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	20 mOhms	1 W	1 %	100 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .04 OHM 1% 1W 100PPM CFN1206AFX-R040ELF Bourns 1: $0.46 179In Stock	Mfr. Part # CFN1206AFX-R040ELF Mouser Part # 652-CFN1206AFX-R040E	Bourns	Current Sense Resistors - SMD .04 OHM 1% 1W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	179In Stock	Cut Tape $0.46 $0.295 $0.222 $0.194 View Reel $0.11 $0.168 $0.145 $0.133 $0.11 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	40 mOhms	1 W	1 %	100 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 1206 R020 5% 1W TCR100 CFN1206AJX-R020ELF Bourns 1: $0.60 1,613In Stock	Mfr. Part # CFN1206AJX-R020ELF Mouser Part # 652-CFN1206AJX-R020E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 1206 R020 5% 1W TCR100 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	1,613In Stock	Cut Tape $0.60 $0.446 $0.348 $0.243 Reel $0.127 View $0.207 $0.188 $0.172 $0.118 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	20 mOhms	1 W	5 %	100 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 1206 R040 5% 1W TCR100 CFN1206AJX-R040ELF Bourns 1: $0.49 4,000In Stock	Mfr. Part # CFN1206AJX-R040ELF Mouser Part # 652-CFN1206AJX-R040E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 1206 R040 5% 1W TCR100 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	4,000In Stock	Cut Tape $0.49 $0.315 $0.238 $0.207 Reel $0.13 View $0.18 $0.163 $0.149 $0.118 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	40 mOhms	1 W	5 %	100 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 1206 R005 5% 1W TCR50 CFN1206AJZ-R005ELF Bourns 1: $0.65 3,842In Stock	Mfr. Part # CFN1206AJZ-R005ELF Mouser Part # 652-CFN1206AJZ-R005E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 1206 R005 5% 1W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	3,842In Stock	Cut Tape $0.65 $0.468 $0.318 $0.225 Reel $0.134 View $0.188 $0.172 $0.149 $0.124 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	5 mOhms	1 W	5 %	50 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 1206 R020 5% 1W TCR50 CFN1206AJZ-R020ELF Bourns 1: $0.50 3,789In Stock	Mfr. Part # CFN1206AJZ-R020ELF Mouser Part # 652-CFN1206AJZ-R020E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 1206 R020 5% 1W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	3,789In Stock	Cut Tape $0.50 $0.322 $0.243 $0.214 Reel $0.131 View $0.186 $0.17 $0.153 $0.121 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	20 mOhms	1 W	5 %	50 PPM / C	1206	3216	3.2 mm (0.126 in)	1.6 mm (0.063 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .005 OHM 1% 1/2W 100PPM CFN0603AFX-R005ELF Bourns 1: $0.47 233In Stock	Mfr. Part # CFN0603AFX-R005ELF Mouser Part # 652-FN0603AFXR005ELF	Bourns	Current Sense Resistors - SMD .005 OHM 1% 1/2W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	233In Stock	Cut Tape $0.47 $0.302 $0.228 $0.191 Reel $0.109 View $0.163 $0.145 $0.13 $0.101	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape	CFN-A	5 mOhms	500 mW (1/2 W)	1 %	100 PPM / C	0603	1608				- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .02 OHM 1% 1/2W 50PPM CFN0603AFZ-R020ELF Bourns 1: $0.44 582In Stock	Mfr. Part # CFN0603AFZ-R020ELF Mouser Part # 652-FN0603AFZR020ELF	Bourns	Current Sense Resistors - SMD .02 OHM 1% 1/2W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	582In Stock	Cut Tape $0.44 $0.279 $0.21 $0.188 Reel $0.109 View $0.163 $0.146 $0.132 $0.101	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape	CFN-A					0603	1608							2 Terminal
Current Sense Resistors - SMD .005 OHM 1% 3/4W 100PPM CFN0805AFX-R005ELF Bourns 1: $0.55 3,629In Stock	Mfr. Part # CFN0805AFX-R005ELF Mouser Part # 652-FN0805AFXR005ELF	Bourns	Current Sense Resistors - SMD .005 OHM 1% 3/4W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	3,629In Stock	Cut Tape $0.55 $0.408 $0.322 $0.226 Reel $0.118 View $0.195 $0.176 $0.15 $0.109	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape	CFN-A					0805	2012							2 Terminal
Current Sense Resistors - SMD .01 OHM 1% 3/4W 50PPM CFN0805AFZ-R010ELF Bourns 1: $0.42 665In Stock 8,000Expected 1/13/2027	Mfr. Part # CFN0805AFZ-R010ELF Mouser Part # 652-FN0805AFZR010ELF	Bourns	Current Sense Resistors - SMD .01 OHM 1% 3/4W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	665In Stock 8,000Expected 1/13/2027	Cut Tape $0.42 $0.267 $0.201 $0.179 Reel $0.107 View $0.154 $0.137 $0.123 $0.097 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A					0805	2012							2 Terminal
Current Sense Resistors - SMD .02 OHM 1% 3/4W 50PPM CFN0805AFZ-R020ELF Bourns 1: $0.43 3,821In Stock	Mfr. Part # CFN0805AFZ-R020ELF Mouser Part # 652-FN0805AFZR020ELF	Bourns	Current Sense Resistors - SMD .02 OHM 1% 3/4W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	3,821In Stock	Cut Tape $0.43 $0.272 $0.205 $0.183 Reel $0.107 View $0.155 $0.137 $0.125 $0.097	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape	CFN-A					0805	2012							2 Terminal
Current Sense Resistors - SMD .03 OHM 1% 3/4W 50PPM CFN0805AFZ-R030ELF Bourns 1: $0.43 4,734In Stock	Mfr. Part # CFN0805AFZ-R030ELF Mouser Part # 652-FN0805AFZR030ELF	Bourns	Current Sense Resistors - SMD .03 OHM 1% 3/4W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	4,734In Stock	Cut Tape $0.43 $0.278 $0.209 $0.171 Reel $0.111 View $0.148 $0.132 $0.121 $0.097	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape	CFN-A					0805	2012							2 Terminal
Current Sense Resistors - SMD .005 OHM 1% 1W 100PPM CFN1206AFX-R005ELF Bourns 1: $0.43 3,441In Stock	Mfr. Part # CFN1206AFX-R005ELF Mouser Part # 652-FN1206AFXR005ELF	Bourns	Current Sense Resistors - SMD .005 OHM 1% 1W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	3,441In Stock	Cut Tape $0.43 $0.274 $0.206 $0.176 Reel $0.114 View $0.149 $0.137 $0.125 $0.099	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape	CFN-A	5 mOhms	1 W	1 %	100 PPM / C	1206	3216				- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .02 OHM 1% 1W 50PPM CFN1206AFZ-R020ELF Bourns 1: $0.48 7,434In Stock	Mfr. Part # CFN1206AFZ-R020ELF Mouser Part # 652-FN1206AFZR020ELF	Bourns	Current Sense Resistors - SMD .02 OHM 1% 1W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	7,434In Stock	Cut Tape $0.48 $0.385 $0.306 $0.201 Reel $0.114 View $0.173 $0.151 $0.129 $0.099 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A					1206	3115							2 Terminal
Current Sense Resistors - SMD .04 OHM 1% 1W 50PPM CFN1206AFZ-R040ELF Bourns 1: $0.43 5,232In Stock	Mfr. Part # CFN1206AFZ-R040ELF Mouser Part # 652-FN1206AFZR040ELF	Bourns	Current Sense Resistors - SMD .04 OHM 1% 1W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	5,232In Stock	Cut Tape $0.43 $0.273 $0.206 $0.177 Reel $0.114 View $0.153 $0.142 $0.129 $0.099	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape	CFN-A	40 mOhms	1 W	1 %	50 PPM / C	1206	3216				- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .01 OHM 1% 1/2W 50PPM CFN0603AFZ-R010ELF Bourns 1: $0.47 8,657Expected 10/21/2026	Mfr. Part # CFN0603AFZ-R010ELF Mouser Part # 652-FN0603AFZR010ELF	Bourns	Current Sense Resistors - SMD .01 OHM 1% 1/2W 50PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	8,657Expected 10/21/2026	Cut Tape $0.47 $0.302 $0.228 $0.199 Reel $0.111 View $0.172 $0.149 $0.136 $0.104 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape, MouseReel	CFN-A	10 mOhms	500 mW (1/2 W)	1 %	50 PPM / C	0603	1608				- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD .02 OHM 1% 1/4W 100PPM CFN0402AFX-R020ELF Bourns 10,000: $0.192 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0402AFX-R020ELF Mouser Part # 652-CFN0402AFX-R020E	Bourns	Current Sense Resistors - SMD .02 OHM 1% 1/4W 100PPM Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Reel $0.192	Min.: 10,000 Mult.: 10,000 : 10,000	Reel	CFN-A	20 mOhms	200 mW (1/5 W)	1 %	100 PPM / C	0402	1005	1.1 mm (0.043 in)	0.55 mm (0.022 in)	0.45 mm (0.018 in)	- 55 C	+ 125 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0402 R01 5% 0.25W TCR100 CFN0402AJX-R010ELF Bourns 10,000: $0.191 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0402AJX-R010ELF Mouser Part # 652-CFN0402AJX-R010E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0402 R01 5% 0.25W TCR100 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Reel $0.191	Min.: 10,000 Mult.: 10,000 : 10,000	Reel	CFN-A	10 mOhms	200 mW (1/5 W)	5 %	100 PPM / C	0402	1005	1.1 mm (0.043 in)	0.55 mm (0.022 in)	0.45 mm (0.018 in)	- 55 C	+ 125 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0402 R02 5% 0.25W TCR100 CFN0402AJX-R020ELF Bourns 10,000: $0.191 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0402AJX-R020ELF Mouser Part # 652-CFN0402AJX-R020E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0402 R02 5% 0.25W TCR100 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Reel $0.191	Min.: 10,000 Mult.: 10,000 : 10,000	Reel	CFN-A	20 mOhms	200 mW (1/5 W)	5 %	100 PPM / C	0402	1005	1.1 mm (0.043 in)	0.55 mm (0.022 in)	0.45 mm (0.018 in)	- 55 C	+ 125 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0603 R010 5% 0.5W TCR100 CFN0603AJX-R010ELF Bourns 1: $0.42 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0603AJX-R010ELF Mouser Part # 652-CFN0603AJX-R010E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0603 R010 5% 0.5W TCR100 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.42 $0.266 $0.20 $0.179 Reel $0.104 View $0.155 $0.139 $0.127 $0.096 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape, MouseReel	CFN-A	10 mOhms	500 mW (1/2 W)	5 %	100 PPM / C	0603	1508	1.6 mm (0.063 in)	0.8 mm (0.031 in)	0.6 mm (0.024 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0603 R005 5% 0.5W TCR50 CFN0603AJZ-R005ELF Bourns 1: $0.54 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0603AJZ-R005ELF Mouser Part # 652-CFN0603AJZ-R005E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0603 R005 5% 0.5W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.54 $0.446 $0.357 $0.243 Reel $0.114 View $0.205 $0.175 $0.143 $0.103 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape, MouseReel	CFN-A	5 mOhms	500 mW (1/2 W)	5 %	50 PPM / C	0603	1508	1.6 mm (0.063 in)	0.8 mm (0.031 in)	0.6 mm (0.024 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0603 R020 5% 0.5W TCR50 CFN0603AJZ-R020ELF Bourns 1: $0.59 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0603AJZ-R020ELF Mouser Part # 652-CFN0603AJZ-R020E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0603 R020 5% 0.5W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.59 $0.499 $0.332 $0.197 Reel $0.112 View $0.167 $0.145 $0.126 $0.103 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	Reel, Cut Tape, MouseReel	CFN-A	20 mOhms	500 mW (1/2 W)	5 %	50 PPM / C	0603	1508	1.6 mm (0.063 in)	0.8 mm (0.031 in)	0.6 mm (0.024 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0805 R005 5% 0.75W TCR10 CFN0805AJX-R005ELF Bourns 1: $0.51 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0805AJX-R005ELF Mouser Part # 652-CFN0805AJX-R005E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0805 R005 5% 0.75W TCR10 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.51 $0.418 $0.341 $0.235 Reel $0.097 View $0.19 $0.162 $0.132 $0.09 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	5 mOhms	750 mW (3/4 W)	5 %	100 PPM / C	0805	2012	2 mm (0.079 in)	1.25 mm (0.049 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0805 R005 5% 0.75W TCR50 CFN0805AJZ-R005ELF Bourns 1: $0.56 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0805AJZ-R005ELF Mouser Part # 652-CFN0805AJZ-R005E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0805 R005 5% 0.75W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.56 $0.468 $0.311 $0.185 Reel $0.105 View $0.156 $0.137 $0.119 $0.095 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	5 mOhms	750 mW (3/4 W)	5 %	50 PPM / C	0805	2012	2 mm (0.079 in)	1.25 mm (0.049 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT
Current Sense Resistors - SMD ResMetalFoil A 0805 R010 5% 0.75W TCR50 CFN0805AJZ-R010ELF Bourns 1: $0.41 Non-Stocked Lead-Time 14 Weeks	Mfr. Part # CFN0805AJZ-R010ELF Mouser Part # 652-CFN0805AJZ-R010E	Bourns	Current Sense Resistors - SMD ResMetalFoil A 0805 R010 5% 0.75W TCR50 Learn More about Bourns cfn a current sensing chip resistors	Datasheet	Non-Stocked Lead-Time 14 Weeks	Cut Tape $0.41 $0.263 $0.198 $0.176 Reel $0.105 View $0.152 $0.134 $0.121 $0.095 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	Reel, Cut Tape, MouseReel	CFN-A	10 mOhms	750 mW (3/4 W)	5 %	50 PPM / C	0805	2012	2 mm (0.079 in)	1.25 mm (0.049 in)	0.7 mm (0.028 in)	- 55 C	+ 155 C	Metal Foil	2 Terminal	SMD/SMT

CFN-A Metal Foil Current Sensing Resistors

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