Current Sense Resistors - SMD

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OARS Open Air Sense Resistors

IRC / TT Electronics OARS Open Air Sense Resistors are rated for 1W at 85°C (2W at 25°C) with resistance values from 0.002Ω to 0.05Ω with tolerances down to +1%. They feature TCRs as low as +20ppm/°C and inductance values in the single‐digit nanohenry range. Operating range is ‐40°C to +125°C. IRC / TT Electronics OARS Open Air Sense Resistors offer compliant terminations that allow them to expand and contract with the PC board's thermal cycling, enabling them to meet or exceed the 1000-2000 cycles required by most automotive manufacturers. This thermal cycling stresses the solder joints of conventional flat chip resistors, which can often cause failure. The unique lead form of the OARS resistors provides an inherent advantage in compliance to the mechanical stress caused by thermal cycling. The welded copper terminals in the OARS Open Air Sense Resistors also provide a low resistance terminal to enhance reliable performance for demanding applications.

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Part #

Current Sense Resistors - SMD 2W 1%

OARS1R010FLF
BI Technologies / TT Electronics
1: $2.64
3,800Expected 12/2/2027

Mfr. Part No.
OARS1R010FLF

Mouser Part No
66-OARS1R010FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 1%

Learn More

Datasheet

3,800Expected 12/2/2027

Cut Tape

$2.64

$1.52

$1.24

$0.929

Reel

$0.66

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .025 OHM 1W 1%

OARS1R025FTR-LF
BI Technologies / TT Electronics
1: $2.65
3,755Expected 29/3/2027

Mfr. Part No.
OARS1R025FTR-LF

Mouser Part No
66-OARS1R025FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .025 OHM 1W 1%

Learn More

Datasheet

3,755Expected 29/3/2027

Cut Tape

$2.65

$1.54

$1.24

$0.93

View

Reel

$0.653

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

25 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 30 mOhms '1%

OARS1R030FLF
BI Technologies / TT Electronics
1: $1.94
3,648Expected 11/12/2026

Mfr. Part No.
OARS1R030FLF

Mouser Part No
66-OARS1R030FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 30 mOhms '1%

Datasheet

3,648Expected 11/12/2026

Cut Tape

$1.94

$1.32

$1.16

$1.06

$0.653

Reel

$0.653

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

30 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 0.05 OHM 1%

OARS1R050FLF
BI Technologies / TT Electronics
1: $1.93
17,713On Order

Mfr. Part No.
OARS1R050FLF

Mouser Part No
66-OARS1R050FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.05 OHM 1%

Learn More

Datasheet

17,713On Order

Cut Tape

$1.93

$1.19

$0.974

$0.84

View

Reel

$0.522

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

50 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 3W 0.004 ohm 1%

OARS3R004FLF
BI Technologies / TT Electronics
1: $3.32
2,800Expected 2/10/2026

Mfr. Part No.
OARS3R004FLF

Mouser Part No
66-OARS3R004FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 3W 0.004 ohm 1%

Learn More

Datasheet

2,800Expected 2/10/2026

Cut Tape

$3.32

$2.03

$1.86

$1.47

View

Reel

$0.881

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

4 mOhms

3 W

1 %

40 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .0025 OHM 1%

OARSXPR0025FLF
BI Technologies / TT Electronics
1: $4.19
3,987On Order

Mfr. Part No.
OARSXPR0025FLF

Mouser Part No
66-OARSXPR0025FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .0025 OHM 1%

Learn More

Datasheet

3,987On Order

Cut Tape

$4.19

$2.46

$2.14

$1.99

View

Reel

$1.36

MouseReel Available

Min.: 1
Mult.: 1

: 1,200

Reel, Cut Tape, MouseReel

OARS

2.5 mOhms

5 W

1 %

40 PPM / C

12 mm (0.472 in)

6.35 mm (0.25 in)

4.57 mm (0.18 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .020 OHM 1%

OARSXPR020FLF
BI Technologies / TT Electronics
1: $3.40
2,400Expected 8/1/2027

Mfr. Part No.
OARSXPR020FLF

Mouser Part No
66-OARSXPR020FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .020 OHM 1%

Learn More

Datasheet

2,400Expected 8/1/2027

Cut Tape

$3.40

Reel

$1.08

MouseReel Available

Min.: 1
Mult.: 1

: 1,200

Reel, Cut Tape, MouseReel

OARS

20 mOhms

5 W

1 %

40 PPM / C

12 mm (0.472 in)

6.35 mm (0.25 in)

4.57 mm (0.18 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 0.01 ohm 1% 2W Sense Resistor

OARS1-R010FI
BI Technologies / TT Electronics
1: $2.64
3,550Expected 11/12/2026

Mfr. Part No.
OARS1-R010FI

Mouser Part No
756-OARS1-R010FI

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.01 ohm 1% 2W Sense Resistor

Datasheet

3,550Expected 11/12/2026

Cut Tape

$2.64

$1.52

$1.24

$0.929

Reel

$0.66

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 55 C

+ 160 C

Metal Element

2 Terminal

SMD/SMT

Current Sense Resistors - SMD 0.02 ohm 1% 2W Sense Resistor

OARS1-R020FI
BI Technologies / TT Electronics
1: $2.65
3,773Expected 2/10/2026

Mfr. Part No.
OARS1-R020FI

Mouser Part No
756-OARS1-R020FI

BI Technologies / TT Electronics

Current Sense Resistors - SMD 0.02 ohm 1% 2W Sense Resistor

Datasheet

3,773Expected 2/10/2026

Cut Tape

$2.65

$1.52

$1.24

$0.932

View

Reel

$0.653

MouseReel Available

Min.: 1
Mult.: 1

: 3,800

Reel, Cut Tape, MouseReel

OARS

20 mOhms

2 W

1 %

20 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 55 C

+ 160 C

Metal Element

2 Terminal

SMD/SMT

Current Sense Resistors - SMD 3W 0.010 ohm 1%

OARS3R010FLF
BI Technologies / TT Electronics
1: $2.57
792Expected 25/9/2026

Mfr. Part No.
OARS3R010FLF

Mouser Part No
66-OARS3R010FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 3W 0.010 ohm 1%

Learn More

Datasheet

792Expected 25/9/2026

Cut Tape

$2.57

$1.85

$1.75

$1.62

$1.08

Reel

$1.08

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

10 mOhms

3 W

1 %

40 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 0.002 Ohms 1%

OARS1R002FLF
BI Technologies / TT Electronics
3,800: $0.699
Non-Stocked

Mfr. Part No.
OARS1R002FLF

Mouser Part No
66-OARS1R002FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 0.002 Ohms 1%

Datasheet

Non-Stocked

Cut Tape

$0.699

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 mOhms

2 W

1 %

240 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 2 mOhms '5%

OARS1R002JLF
BI Technologies / TT Electronics
3,800: $0.718
Non-Stocked

Mfr. Part No.
OARS1R002JLF

Mouser Part No
66-OARS1R002JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 2 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$0.718

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 mOhms

2 W

5 %

240 PPM / C

11.56 mm (0.455 in)

3.56 mm (0.14 in)

3.51 mm (0.138 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 1W 0.004 1%

OARS1R004FLF
BI Technologies / TT Electronics
3,800: $0.609
Non-Stocked

Mfr. Part No.
OARS1R004FLF

Mouser Part No
66-OARS1R004FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 1W 0.004 1%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.609

$0.601

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

4 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 4 mOhms '5%

OARS1R004JLF
BI Technologies / TT Electronics
3,800: $0.578
Non-Stocked

Mfr. Part No.
OARS1R004JLF

Mouser Part No
66-OARS1R004JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 4 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$0.578

$0.571

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .005 OHM 1W 5%

OARS1R005JTR-LF
BI Technologies / TT Electronics
3,800: $0.471
Non-Stocked

Mfr. Part No.
OARS1R005JTR-LF

Mouser Part No
66-OARS1R005JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .005 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.471

$0.445

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

5 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .01 OHM 1W 5%

OARS1R010JTR-LF
BI Technologies / TT Electronics
3,800: $0.404
Non-Stocked

Mfr. Part No.
OARS1R010JTR-LF

Mouser Part No
66-OARS1R010JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .01 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.404

$0.378

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

10 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 1W 0.015 5%

OARS1R015JLF
BI Technologies / TT Electronics
3,800: $0.491
Non-Stocked

Mfr. Part No.
OARS1R015JLF

Mouser Part No
66-OARS1R015JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 1W 0.015 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.491

$0.476

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

15 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .015 OHM 1W 5%

OARS1R015JTR-LF
BI Technologies / TT Electronics
3,800: $0.404
Non-Stocked

Mfr. Part No.
OARS1R015JTR-LF

Mouser Part No
66-OARS1R015JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .015 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.404

$0.378

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

15 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 22 mOhms '1%

OARS1R022FLF
BI Technologies / TT Electronics
3,800: $0.56
Non-Stocked

Mfr. Part No.
OARS1R022FLF

Mouser Part No
66-OARS1R022FLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 22 mOhms '1%

Datasheet

Non-Stocked

Cut Tape

$0.56

$0.544

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .022 OHM 1W 1%

OARS1R022FTR-LF
BI Technologies / TT Electronics
3,800: $0.427
Non-Stocked

Mfr. Part No.
OARS1R022FTR-LF

Mouser Part No
66-OARS1R022FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .022 OHM 1W 1%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.427

$0.401

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

22 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 22 mOhms '5%

OARS1R022JLF
BI Technologies / TT Electronics
3,800: $0.525
Non-Stocked

Mfr. Part No.
OARS1R022JLF

Mouser Part No
66-OARS1R022JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 22 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$0.525

$0.51

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 W

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD 2W 25 mOhms '5%

OARS1R025JLF
BI Technologies / TT Electronics
3,800: $0.525
Non-Stocked

Mfr. Part No.
OARS1R025JLF

Mouser Part No
66-OARS1R025JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD 2W 25 mOhms '5%

Datasheet

Non-Stocked

Cut Tape

$0.525

$0.51

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

2 W

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .03 OHM 1W 1%

OARS1R030FTR-LF
BI Technologies / TT Electronics
1: $2.53
Non-Stocked Lead-Time 38 Weeks

Mfr. Part No.
OARS1R030FTR-LF

Mouser Part No
66-OARS1R030FTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .03 OHM 1W 1%

Learn More

Datasheet

Non-Stocked Lead-Time 38 Weeks

Cut Tape

$2.53

$1.46

$1.06

$0.781

View

Reel

$0.601

MouseReel Available

Min.: 1
Mult.: 1

: 1,900

Reel, Cut Tape, MouseReel

OARS

30 mOhms

2 W

1 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .030 OHM 5%

OARS1R030JLF
BI Technologies / TT Electronics
3,800: $0.491
Non-Stocked

Mfr. Part No.
OARS1R030JLF

Mouser Part No
66-OARS1R030JLF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .030 OHM 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.491

$0.483

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

30 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

Current Sense Resistors - SMD .03 OHM 1W 5%

OARS1R030JTR-LF
BI Technologies / TT Electronics
3,800: $0.404
Non-Stocked

Mfr. Part No.
OARS1R030JTR-LF

Mouser Part No
66-OARS1R030JTR-LF

BI Technologies / TT Electronics

Current Sense Resistors - SMD .03 OHM 1W 5%

Learn More

Datasheet

Non-Stocked

Cut Tape

$0.404

$0.378

Min.: 3,800
Mult.: 1,900

: 1,900

Reel

OARS

30 mOhms

2 W

5 %

40 PPM / C

11.18 mm (0.44 in)

3.18 mm (0.125 in)

3.05 mm (0.12 in)

- 40 C

+ 125 C

Metal Element

2 Terminal

SMD/SMT

AEC-Q200

OARS Open Air Sense Resistors

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